Installation and Operations

Guide
®
BACtalk Integrator
(BTI)
Document ID: LTBT-TM-BTI

Terminating cable ......................................................................11

Initial configuration and setup..................................................11
Requirements and guidelines..............................................11
HyperTerminal settings .......................................................12
Connecting to the BTI for the first time................................13
Using data on the opening screen of the Configuration
and Diagnostic Utility .......................................................14
Working in the Configuration and Diagnostic Utility
environment.....................................................................15
Setting the Device Instance ................................................16
Setting the current date and time ........................................16
Setting network parameters ................................................16
Saving changes and closing HyperTerminal.......................16
Network connections and configuration .................................17
MS/TP .................................................................................17
Overview ....................................................................17
Terminating cable.......................................................18
MS/TP configuration parameters................................18
Ethernet...............................................................................18
Overview ....................................................................18
Connection .................................................................18
Contents Configuring Ethernet network parameters..................19
BACnet/IP over Ethernet.....................................................19
Quick-start—BTI setup ............................................................... 6 Configuring BACnet/IP parameters ............................20
Point-to-point (PTP) ............................................................23
About this guide and related publications ............................... 7
Connecting a BACtalk operator terminal and downloading
Version and compatibility information...................................... 7 real-time operating code........................................................24
BTI features and operation......................................................... 8 Troubleshooting and maintenance ..........................................24
Technical data ...................................................................... 8 Using diagnostic LEDs ........................................................25
System boot code and real-time operating code.................. 9
Replacement parts and accessories ...................................25
System boot code........................................................ 9 Coin-cell battery replacement .............................................25
Real-time operating code ............................................ 9 Gel-cell battery replacement ...............................................26
Mounting and power................................................................. 10 Testing the gel-cell battery .........................................26
Mounting guidelines ........................................................... 10 Using DIP switches to clear data ........................................26
Power requirements ........................................................... 10 Clearing DDC, objects, and automation setups .........26
Grounding........................................................................... 10 Clearing real-time operating code ..............................27

6670 185th AVE NE Redmond, WA 98052 USA Voice:425.869.8400 Fax:425.869.8445 e-mail:info@alerton.com www.alerton.com
 BA C t alk I nt egr a t or (BTI)—I nst a llat io n an d O pe r at io ns G u ide

Important safety information and

installation precautions
Read all instructions Failure to follow all instructions may result in equipment damage or a hazardous
condition. Read all instructions carefully before installing equipment.

Local codes and practices Always install equipment in accordance with the National Electric Code and in a
manner acceptable to the local authority having jurisdiction.

Electrostatic sensitivity This product and its components may be susceptible to electrostatic discharge
(ESD). Use appropriate ESD grounding techniques while handling the product. When possible, always handle the
product by its non-electrical components.

High voltage safety test Experienced electricians, at first contact, always assume that hazardous voltages
may exist in any wiring system. A safety check using a known, reliable voltage measurement or detection device should
be made immediately before starting work and when work resumes.

Lightning and high-voltage danger Most electrical injuries involving low-voltage wiring result from sudden,

!
unexpected high voltages on normally low-voltage wiring. Low-voltage wiring can carry hazardous high voltages under
unsafe conditions. Never install or connect wiring or equipment during electrical storms. Improperly protected wiring can
carry a fatal lightning surge for many miles. All outdoor wiring must be equipped with properly grounded and listed
signal circuit protectors, which must be installed in compliance with local, applicable codes. Never install wiring or
equipment while standing in water.

Wiring and equipment separations All wiring and controllers must be installed to minimize the possibility of
accidental contact with other, potentially hazardous and disruptive power and lighting wiring. Never place 24VAC or
communications wiring near other bare power wires, lightning rods, antennas, transformers, or steam or hot water
pipes. Never place wire in any conduit, box, channel, duct or other enclosure containing power or lighting circuits of any
type. Always provide adequate separation of communications wiring and other electrical wiring according to code. Keep
wiring and controllers at least six feet from large inductive loads (power distribution panels, lighting ballasts, motors,
etc.). Failure to follow these guidelines can introduce electrical interference and cause the system to operate erratically.

Warning This equipment has been tested and found to comply with the limits for a class A digital device, pursuant to part 15 of
the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference, in which case the user will be required to correct the
interference at his own expense.

© 2001 Alerton Technologies, Inc. All Rights Reserved.

6670 185th AVE NE
Redmond, WA 98052 USA
Phone: (425)869-8400 FAX: (425)869-8445
Web Site: www.alerton.com E-mail: info@alerton.com
0003

All information in this document is provided as is without warranty of any kind. Alerton Technologies, Inc. reserves the right to change any information herein without prior notice.
No guarantees are given as to the accuracy of information. Trademarks and trade names may be used in this document to refer to either the entities claiming the marks and
names or their products. Alerton, BACtalk, and their logos are registered trademarks and VisualLogic is a trademark of Alerton Technologies, Inc. Alerton Technologies, Inc.
disclaims any proprietary interest in trademarks and trade names other than its own.

Questions, corrections, comments?

To improve our information products and better serve our readers, your feedback is vital. If you have any questions, corrections, or comments about this publication or any other
Alerton information products, please send e-mail to techcomm@alerton.com.

2 LTBT-TM-BTI
 Diagnostic LEDs indicate Power diagnostic LEDs
operational status. See “Using indicate 24 VAC and gel-cell Ground lug. Connect
diagnostic LEDs” on p. 25. battery status. See “Using to known earth ground.
RJ-45 jack for 10Base-T/
100Base-TX connections to diagnostic LEDs” on p. 25
Ethernet.
Terminals for 24 VAC
from dedicated, UL listed
Class 2 transformer
(removable). Do not
ground either leg of
transformer secondary.
Ethernet status LEDs. Speed ON = 100
See “Power requirements”
Mbps. Link ON = Indicates Ethernet link
on p. 10.
established, ready to transmit and
receive. TX ON (flashing) = Transmitting
data. RX ON (flashing) = Receiving data. 1 Amp fuse protects
board from power supply.
See Table 9 on p. 25 for
type and part number.
Removable terminal strip for
MS/TP LANs provide easy Keyed connector for 12V
cabling terminations. Four LANs gel-cell battery
identified as A–D. See “MS/TP”
on page 17.

6-position analog phone

jack for optional 33.6 Kbps
XMT and REC LEDs for onboard modem. Functional
each MS/TP LAN indicate only on BTI-MDM (BTI with
communications status. modem option).
XMT solid ON/REC OFF
indicates an unconnected
MS/TP LAN. Flashing XMT 12V gel-cell battery, with
and REC LEDs indicate connection harness and
normal operation. Note: mounting bracket. Provided with
LEDs may appear to be unit. See Table 9 on p. 25 for
steady ON if MS/TP traffic is type and part number. Provides
exceptionally heavy. power through brownouts and
Male DB-9 connector
power failures, enabling orderly
for EIA-232 BACnet PTP
shut down and back up of all
connections. Use to AC-2650 jack to
operational data, including DDC,
direct connect a BACtalk connect PC for initial
objects, and automation setups.
operator terminal. See configuration with a
“Point-to-point (PTP)” on terminal emulation
program. See “Initial Reset button. Press to cycle BTI power. Use in
p. 23.
configuration and conjunction with DIP switches 3 and 4 to clear
setup” on p. 11. Can objects and BIN from the BTI. See “Using DIP
also be used for switches to clear data” on p. 26.
operator terminal PTP
DIP switch bank SW1. Switches 3 and 4 can be used
connections.
to clear real-time operating code and objects from
BTI. See “Using DIP switches to clear data” on p. 26.

Fig. 1 The BACtalk Integrator (BTI).

LTBT-TM-BTI 3
 BA C t alk I nt egr a t or (BTI)—I nst a llat io n an d O pe r at io ns G u ide

NEMA enclosure
consistent with
Shield drain To known earth ground. application 6 AWG ground
(ground at one requirements. cable.
end only).

CAT 5 or better
patch cord/drop
cable to hub or
switch (100 m.
max).

ETHERNET
R
10/100 BASE-T AC POWER GND
(RJ-45)

BATTERY POWER
OPERATION

{ 24VAC
24VAC

FUSE:
1 AMP FAST Dedicated, UL listed
5x20mm, 250V

MS/TP A +
FOR INDOOR USE ONLY
CLASS 2 WIRING DEVICE
Class 2 transformer.
Communications MS/TP A -

MS/TP B +
POWER: MAX LOAD - 10VA
USE COPPER CONDUCTORS ONLY
Warning! Do not
MS/TP B -
pathway. MS/TP C +
ground either leg of
MS/TP C -

transformer
R

MS/TP D +
C UL
R US
MS/TP D -
OPEN ENERGY MANAGEMENT
EQUIPMENT LISTED 5K05
secondary.
CPU FLASHING = NORMAL OPERATION

ON = NORMAL / READY
SYS
OFF = SERVICE REQUIRED

PTP ON = OMF LOADED / OPERATIONAL

12V BATTERY - + Optional fuse
Shielded 22 AWG EIA-232
(DB-9)
OMF
OFF = OMF DOWNLOAD REQUIRED
(1 Amp time-delay)
MS/TP cable DDC FLASHING = DDC LOADED / OPERATIONAL MODEM
(OPTIONAL)
installed on either leg
AC-2650

(ConnectAir of 24 VAC secondary

#W221P-2554 or for additional
#W221P-1504 protection.
recommended).
Maintain polarity. 2.75" (96 mm)
min.
Gel-cell battery and bracket,
R

mounted with min. distance

REPLACE WITH ALERTON BATTERY
PART #: BTI-BAT-12V
as shown for access.
REFER TO USERS MANUAL BEFORE SERVICING

Precision resistor
(120 Ohm 1/4 W +/- 5%
recommended)
matched to resistor at
other end of segment.

Fig. 2 Typical BTI installation, showing one MS/TP termination and ground.

4 LTBT-TM-BTI
Fig. 3 BTI dimensions.

LTBT-TM-BTI 5
 BA C t alk I nt egr a t or (BTI)—I nst a llat io n an d O pe r at io ns G u ide

Quick-start—BTI setup
Use Table 1 to determine the order of tasks to perform when you set up the BTI. The table also lists references in
this document and elsewhere where you can get more information.

Table 1 Installation tasks for the BTI, with cross-references to more information.

For more information, please see…

Task In this guide In other documentation

Make sure you have a PC with a free K PC documentation

COM port that is setup correctly for
communications.

Determine the network and device N/A N/A

instance numbering for the BTI and
the devices on its MS/TP LAN.

Mount the BTI. K “Mounting guidelines” on p. 10

Mount the external gel-cell battery K Fig. 2 on p. 4

and connect to BTI.

Connect the BTI to power. K “Power requirements” on p. 10

Connect to the BTI using an Alerton K “Initial configuration and setup” on p. 11

AC-2650 connected to a COM port on
your PC.

Start HyperTerminal or another K “Requirements and guidelines” on p. 11

terminal emulation program to K “HyperTerminal settings” on p. 12
configure the BTI and set session
details.

Set the correct date and time at the K “Setting the current date and time” on p. 16
BTI.

Enable networks and set network K “Network connections and configuration” on p. 17 K BACtalk Network Installation and Design
parameters (network number, speed, Guide (LTBT-TM-NETWRK)
MAC addresses). Important! For
unused networks or stand-alone
applications, set unique network
parameters nonetheless to ensure
correct operation.

Save configuration settings. K “Saving changes and closing HyperTerminal” on

p. 16

Connect the BTI to Ethernet and MS/ K “Network connections and configuration” on p. 17
TP networks.

Use a BACtalk for Windows operator K “Connecting a BACtalk operator terminal and K BACtalk for Windows online help
terminal to scan the network, downloading real-time operating code” on p. 24 K BACtalk Operator’s Manual (LTBT-MAN-
confirming that the BTI is online. OP)

6 LTBT-TM-BTI
 A bo ut t his gu ide and r ela te d p ubl ica ti ons

Table 1 Installation tasks for the BTI, with cross-references to more information. (Continued)

For more information, please see…

Task In this guide In other documentation

Add a record for the BTI to Device K “Connecting a BACtalk operator terminal and K BACtalk for Windows online help
Manager (Unit Type is Global downloading real-time operating code” on p. 24 K BACtalk Operator’s Manual (LTBT-MAN-
Controller). OP)

Optional. Send real-time operating K “Connecting a BACtalk operator terminal and K BACtalk for Windows online help
code to the BTI. Necessary only if a downloading real-time operating code” on p. 24 K BACtalk Operator’s Manual (LTBT-MAN-
more recent version is available. OP)

Use BACtalk to program DDC, set up K BACtalk for Windows online help
trendlogs, schedules, alarms, and K BACtalk Operator’s Manual (LTBT-MAN-
other control features. OP)

About this guide and DDC programming and advanced automation setup
See the
BACtalk Programmer’s Guide and Reference (LTBT-

related publications
TM-PRGRMR).

Using a BACtalk operator terminal See the BACtalk for

Windows Operator’s Manual (LTBT-MAN-OP) for
In addition to technical data and general information instructions on setting up and using schedules,
about the BTI, this guide provides instructions and trendlogs, alarms, and other automated features.
guidelines for: Installing and configuring BACtalk for Windows
See the
K Mounting BACtalk for Windows Installation and
Administration Guide (LTBT-TM-ADMIN).
K Connecting power and communications cabling
K Initial configuration and setup
K Downloading operating code from a BACtalk
operator terminal Version and
compatibility
K Using diagnostic and troubleshooting tools
For the following information, see the resources listed.

Network architecture, installation, and addressing

See the
BACtalk Network Installation and Design Guide
(LTBT-TM-NETWRK), which describes BACnet network
information
architectures with BACtalk products. Covers all
K BACtalk for Windows Version 3.11 or later is
BACnet LAN types—Ethernet, ARCNET, MS/TP, and required.
PTP—and provides rules and guidelines for
K VisualLogic Controllers (VLCs) The BTI is only
installation and configuration.
compatible with VLCs with firmware v1.03 and
later.

LTBT-TM-BTI 7
 BA C t alk I nt egr a t or (BTI)—I nst a llat io n an d O pe r at io ns G u ide

BTI features and Building automation features

The BTI supervises
automated control features such as schedules,

operation
trendlogs, energy logs, and alarms. These features
are set up and downloaded using BACtalk version
3.11 or later.

Stand-alone operation The BTI has full functionality in a

The Alerton® BACtalk® Integrator (BTI) is a high-
stand-alone capacity, without permanent connection
performance, programmable network controller and
to a BACtalk operator terminal.
multi-port BACnet-compliant router. Its
communications design and messaging structure Data backup and orderly shutdownOn loss of power or
comply with ANSI/ASHRAE Standard 135-1995, brownout, the BTI uses its gel-cell battery to back up
BACnet. all operational data. All configuration data, DDC,
object and property values, and building automation
BACnet networks and connection options The BTI supports
setups are saved to persistent memory.
the following connection options:

K One 10Base-T or 100Base-TX Ethernet connection

to support BACnet or BACnet/IP messaging
K “Annex J” BACnet/IP messaging—functions as a
Technical data
BACnet broadcast management device (BBMD)
Table 2 BTI technical data.
K Four BACnet MS/TP LAN connections
K BACnet point-to-point (PTP) connection over serial AC power 24 VAC, 50-60 Hz @ 10 VA max. Utilizes a full-
cable wave rectifier. Requires a dedicated, UL listed
24 VAC transformer. Warning! Do not ground
K BACnet PTP connection over modem (optional either leg of transformer secondary.
accessory)
Gel-cell battery External gel-cell battery assembly (included)
Initial configuration connection For initial network provides power conditioning and noise filtering
configuration and setup, connect a PC running for ongoing operational data integrity. Provides
up to five minutes of powerless operation for
HyperTerminal with an Alerton AC-2650 cable. See
orderly shutdown and data backup.
“Initial configuration and setup” on page 11.
Battery Replaceable 3.0V lithium battery provides up to
BACtalk operator terminal connection
To program and 1.5 years cumulative real-time clock without AC
download DDC or set up building automation or battery power. Standby battery life is 10
years. Coin-cell type CR1225 or equivalent.
features, connect a BACtalk operator terminal over
Requires unit disassembly to replace (see
the BACnet internetwork or one of the PTP connection “Coin-cell battery replacement” on p. 25).
methods: modem or serial cable (null modem cable
Memory and CPU 128K SRAM. 32MB DRAM for program
or AC-2650). execution. 16MB CompactFlash and 64 K flash
RAM. 32-bit high-integration Motorola CPU
Controllers Supported
250 controllers max., equally running at 50MHz.
loaded among four MS/TP LANs.
Real-time clock Onboard, battery-backed, real-time quartz clock
Direct Digital Control (DDC) programming
DDC is stored and supports schedule operations, trendlogs, and
timed DDC functions.
executes locally in the BTI. Program and download
DDC using VisualLogic in BACtalk version 3.11 or BACnet Ethernet Integrated Ethernet adapter circuitry with RJ-45
later. The BTI provides 6 MB RAM for DDC execution jack for connection to 10Base-T (10 Mbps) or
100Base-TX (100 Mbps) networks.
and object storage.

8 LTBT-TM-BTI
 BTI f ea tu r es and ope r at io n

Table 2 BTI technical data. (Continued)

System boot code
BACnet/IP IP support for interoperability on wide area
networks (WANs) and campus area network
System boot code is required for all operations. It is
(CANs). Functions as a BACnet Broadcast
Management Device (BBMD) in accordance factory loaded and cannot be modified in the field.
with “Annex J” BACnet/IP. The SYS LED (see “Using diagnostic LEDs” on p. 25)
BACnet MS/TP Support for 4 BACnet MS/TP LANs. indicates system boot code status. Instances of lost or
Removable, header-style screw terminals. Each corrupt system boot code are rare but may occur
MS/TP LAN individually configurable from 9.6 to under catastrophic circumstances. If the SYS LED is
76.8 Kbps.
off, factory service is required. Contact your Alerton
Direct access port Female DB-9 connector supports BACnet representative.
temporary PTP connection of portable BACtalk
operator terminal at 9.6 to 115.2 Kbps over EIA-
232 null modem cable and connection of
external modem. Real-time operating code
Dimensions 7.10"(181mm)H X 7.00"(178mm)W X 1.62"(
42mm)D. See Fig. 3 on p. 5. ROC is the foundation of controller operations and is
Environmental 32–131°F(0-55°C). 0–95% RH, non- required for the BTI to host DDC and building
condensing. automation features. To operate, the ROC requires
BACnet conformance Conformance Class 3. operational system boot code.

Ratings • Listed Underwriters Laboratory for Open The OMF LED indicates the operational status of
Energy Management Equipment (PAZX) ROC. See “Using diagnostic LEDs” on p. 25.
under the UL Standard for Safety 916.
Listing includes both U.S. and Canadian An initial ROC is loaded at the factory. Periodic
certification. updates to the ROC may be required (for example,
• EMC Directive 89/336/EEC (European CE
when a new version of BACtalk software is available).
Mark).
• FCC Part 15, Subpart J, Class A. Pending.
ROC files for controller must be saved in the <bactalk
root>\system directory to be downloaded to a
controller. ROC files typically have OMF or BIN
System boot code and real-
real- extensions. The ROC is field-upgradable using
BACtalk for Windows. See BACtalk online help or the

time operating code BACtalk Operator’s Manual (LTBT-MAN-OP) for

information about downloading OMF and BIN files.
The BTI ships from the factory with system boot code ROC file for the BTI: <bactalk root>\system\app10.bin
and a real-time operating code (ROC) file pre-loaded
at the factory.
Important! You must configure the BTI for network
Unique to application, operations before you can connect a BACtalk operator
user interactive
DDC Automation
terminal and load a BIN (see “Initial configuration and
Real-time Operating
Operator upgradable
Code (Application) setup” on p. 11).
System Boot Code
Factory loaded (Loader)

Fig. 4 BTI system boot code, ROC, and application execution.

LTBT-TM-BTI 9
 BA C t alk I nt egr a t or (BTI)—I nst a llat io n an d O pe r at io ns G u ide

Mounting and power Recommended cable 18 AWG (max. 4 ft.) for power
connections. Mount the transformer inside the
enclosure with the BTI.

See Fig. 2 on p. 4 for typical mounting. See Table 2 on Additional protection For optimum protection, install a 1
p. 8 for environmental requirements. Amp time-delay fuse in series with either leg of the 24
VAC secondary.

Mounting guidelines
See Fig. 2 on p. 4 for an example installation diagram.

Enclosure Mount the BTI and the gel-cell battery

assembly in an approved NEMA enclosure consistent Grounding
with your installation requirements. Leave a minimum
Connect the ground lug (GND) on the upper right side
clearance of 2" between the BTI vent openings and
of the BTI to panel ground using 6 AWG ground cable.
panel sides or any other equipment.
Ensure that panel ground connects to a known earth
Location The BTI is intended for indoor applications. ground.
Mount in a clean, dry location away from direct
sunlight. Warning! Ensure that you secure the ground cable
Orientation The BTI can be mounted in any orientation. correctly between the ground screw and the termination
platform as shown in Fig. 5.
Gel-cell battery and base unit separation Ensure that the gel-
cell battery and bracket assembly is mounted such
that the battery can be extracted from the bracket for Use the panel ground to terminate all MS/TP cable
service. If mounting the battery below the unit, leave shields. Ensure that only one end of the MS/TP shield
2.75" (69.85mm) for access. See Fig. 2 on p. 4. is grounded.

Adequate separation of power and communications cabling

Run See Fig. 2 on p. 4 for an example installation diagram.
power cabling through the right side of the enclosure
BTI Ground Lug: Side View
and communications cabling through the left side of Ground screw

the enclosure. Insert ground cable here and

tighten screw to secure

Power requirements Warning! Do not insert

ground cable here.
Termination platform

The BTI requires a 24VAC, 50/60Hz @ 10VA min. Circuit board

power supply. Use a UL listed Class 2 transformer.

Warning! Do not ground either leg of transformer

secondary! This will damage the BTI. Do not power any
Fig. 5 Proper ground cable termination to BTI ground lug.
other devices from the same transformer. Use a dedicated
transformer for the BTI.

10 LTBT-TM-BTI
 Te r mi nat in g ca ble

Terminating cable Initial configuration

The BTI uses removable, header-style termination
blocks to simplify termination of power and
and setup
communications cabling. If desired, you can remove
To configure device and network parameters in the
the terminal blocks from the circuit board, terminate
BTI, use a PC running a terminal emulation program,
cable, and re-seat the block when you finish.
such as HyperTerminal. The PC physically connects to
Adjustment screw
the BTI using an Alerton AC-2650 cable, which runs
from the computer’s COM port to connector J3 on the
lower left of the BTI. An AC-2650 cable is required for
configuration.
Wire slot
Terminal block
When connected to the BTI with the terminal emulation
program running, you are in the “BTI Configuration
and Diagnostics Utility.”

This topic provides:

VLC header pins

K General requirements and guidelines for making

the connection and configuring the BTI.
K Instructions for configuring HyperTerminal after
the physical connection is made.
Fig. 6 Terminal block detail.
K Step-by-step instructions for setting up network
and other device parameters using the BTI
k To terminate cable: Configuration and Diagnostics Utility.

1 Strip approximately 1/8" of the cable jacket from the

2
end of the cable.
Use a small screwdriver (1/8” max) to turn the
Requirements and guidelines
adjustment screw fully counter-clockwise. K The BTI must be connected to power during
The clamps in the wire slot separate as you turn the configuration. See “Power requirements” on p. 10.
screw. K You must have an Alerton AC-2650 cable and a
computer with a free 9-pin COM port and
3 When the clamps in the wire slot are fully open, insert terminal emulation program (HyperTerminal) to
the stripped end of the cable (try to get the jacket flush configure the BTI. Initial configuration cannot be
with the terminal block) into it. If using stranded cable, performed over Ethernet networks or a PTP
be sure to insert all strands into the wire slot. connection.
K Connection issues are often attributed to a
4 Hold the cable in place and turn the adjustment screw
disabled PC COM port or a non-standard COM
clockwise to tighten it until the clamps in the wire slot port configuration. Use your Windows Device
secure the cable. Manager or your computer’s BIOS setup if your
5 Tug gently on the cable to ensure that it’s securely COM port doesn’t appear to be working.
terminated. K Configuration testing was performed with
HyperTerminal in a Windows environment. Use
HyperTerminal for best results.

LTBT-TM-BTI 11
 BA C t alk I nt egr a t or (BTI)—I nst a llat io n an d O pe r at io ns G u ide

K It is highly recommended that you connect to the

device and configure it before physically
connecting to networks to minimize the potential
for network conflicts.
K Configuration parameters are stored in persistent
memory. You can perform configuration tasks off-
site, if necessary, remove power, and the BTI will
retain settings.

HyperTe
HyperTerminal
Terminal settings
Confirm settings in Table 3 for your HyperTerminal
connection to the BTI. These settings apply to other
terminal emulation programs as well.

Table 3 HyperTerminal settings for connection to the BTI.

Property Setting

Bits per second 57,600

Data bits 8

Parity None

Stop bits 1

Flow control None

For HyperTerminal, default advanced settings should

be appropriate. However, if advanced settings are
changed, use the defaults shown in Fig. 7 as a
reference.

Fig. 7 Advanced configuration defaults for HyperTerminal connection to

BTI.

12 LTBT-TM-BTI
 In it ial con fi gur a ti on a nd s et u p

Connecting to the BTI for The setup window closes and the HyperTerminal
window is blank with a blinking cursor.

the first time 7 Press ENTER on your computer keyboard to initiate

the session with the BTI.
This topic provides step-by-step instructions for The opening screen of the BTI Configuration and
starting a HyperTerminal session with the BTI and Diagnostics Utility appears (see Fig. 8 on p. 14 for
introduces information on the opening screen of the detail).
BTI Configuration and Diagnostic Utility. It then
provides instructions for saving the BTI connection
profile for later use.

k To connect to a BTI for the first time and open the BTI
Configuration and Diagnostic Utility:

1 Connect the BTI to power (see “Power requirements”

on p. 10) and start the PC.
2 Connect the PC COM port to Terminal J3 on the lower
left of the BTI with the AC-2650 cable. Make a note of
the PC COM port you use. You’ll need it when you
start HyperTerminal.
8 Type the case-sensitive configuration password
3 Start HyperTerminal (typically found under Programs/
(pass) and then press ENTER to view the Main
Accessories on the Start Menu).
Menu.
HyperTerminal prompts you to create a connection
profile in the Connection Description dialog box.

4 Type a name for the new connection, select a different

icon if desired, and then click OK.
k To save the BTI connection profile:
5 In the Connect To dialog box, from the Connect Using
. From the File menu in HyperTerminal, choose Save.
list, choose the COM port from step 2 and then click
OK. The connection is saved with the name you created in
HyperTerminal prompts you to provide connection the Connection Description dialog box.
properties.
6 In the connection properties dialog box, choose
settings according to Table 3 on p. 12 and then click
OK.

LTBT-TM-BTI 13
 BA C t alk I nt egr a t or (BTI)—I nst a llat io n an d O pe r at io ns G u ide

Using data on the opening configuration parameters. Operator’s can view this
screen without having to enter a password. To change

screen of the Configuration

any settings or configuration parameters, a password
is required. See Fig. 8 for item detail.

and Diagnostic Utility

The opening screen of the Configuration and
Diagnostic Utility provides critical information about
the version of BTI running and key network

Ethernet Network Number Indicates the

BACnet network number of the Ethernet
network. Must be unique throughout the
BACnet internetwork.

MAC Indicates the MAC address of the

unit on the Ethernet network. The MAC
address is hard-coded in the BTI Ethernet
NIC. The MAC may be helpful while
troubleshooting if you use a sniffer or other
network monitoring device.

MS/TP Settings For each of the four MS/TP LANs (A–D), the BTI shows an at-a-glance view of
critical MS/TP network parameters: the BACnet network number (which must be unique throughout
the internetwork), the MAC address of the BTI on that network (which must be unique on the
MS/TP LAN), and the transmission speed in Kbps.

Device Instance Indicates the BACnet Device Instance currently assigned to this BTI.

DDC Indicates the DDC program loaded. If blank, no recognizable DDC file is loaded. The DDC program is identified by its
rep/job location on the BACtalk operator terminal and its file name.

Application Indicates the real-time operating code (ROC) version.

Firmware Revision Indicates the firmware version.

Loader Revision Indicates the system boot code version.

Fig. 8 Opening screen of the BTI Configuration and Diagnostic Utility.

14 LTBT-TM-BTI
 In it ial con fi gur a ti on a nd s et u p

Working in the Configuration If you make a mistake while entering a value in the
correct field, press the backspace key and then

and Diagnostic Utility

change it. If you choose to edit the wrong item, note
the current value of the item, type it again, and press
ENTER.
environment The topic “Setting the Device Instance” provides
detailed step-by-step instructions if you need them to
After you log in to the Configuration and Diagnostic
get started. Other topics assume you are comfortable
Utility with your password, you navigate and change
with the editing environment.
parameters using your PC keyboard.

Type the letter of the menu you want to display or the Important! After making any changes, make sure to exit
item you want to change and then press ENTER. When appropriately to save your changes. See “Saving changes
you type the letter of a configuration item, the BTI and closing HyperTerminal” on p. 16.
prompts you for a value. Type the value and then
press ENTER to set it.

Type a selection letter and enter data on this line.

Set the Date and Time See “Setting the current date and time” on p. 16.

Link to IP Configuration Screen See “Configuring BACnet/IP parameters” on p. 20.

Link to PTP Configuration Screen See “Point-to-point (PTP)” on p. 23.

Settings for each MS/TP network See “MS/TP configuration parameters” on p. 18.

Ethernet settings See “Configuring Ethernet network parameters” on p. 19.

Device Instance Use this item to change the Device Instance. See “Setting the Device Instance” on p. 16.

Fig. 9 The BTI Configuration screen.

LTBT-TM-BTI 15
 BA C t alk I nt egr a t or (BTI)—I nst a llat io n an d O pe r at io ns G u ide

Setting the Device Instance The BTI can receive BACnet Time Sync commands
from other BACnet devices. Problems with the date
and time are most often attributed to Time Sync
The Device Instance is a unique number throughout
conflicts or errors.
the BACnet internetwork that identifies the device for
BACnet communications. Valid range for the Device The date and time are persistent as long as the coin-
Instance is 0–4194303. cell battery is operational. If the coin-cell battery is
losing its charge, the date or time may become
See the BACtalk Network Installation and Design
inaccurate.
Guide (LTBT-TM-NETWRK) for more detailed
information.

k To set the BTI device instance:

Setting network parameters
1 Identify a Device Instance to use. This device instance
must be unique among all interconnected BACnet Appropriate network parameters are essential to BTI
devices. and BACnet internetwork operations. See “Network
connections and configuration” for more information
2 Connect to the BTI, start the Configuration and about networks and appropriate configuration
Diagnostic Utility (see “Connecting to the BTI for the parameters.
first time” on p. 13), type in your password, and then
press ENTER.

3
The Main Menu appears.
Type A and then press ENTER to select "Change
Saving changes and closing
Configuration."
HyperTerminal
4 Type A and then press ENTER to select "Device
Instance." After you make changes in HyperTerminal, you want
to exit appropriately to save your changes to
5 Type a Device Instance and then press ENTER.
persistent memory in the BTI.
6 Save your settings now or after you configure other
parameters (see “Saving changes and closing
Caution! Ending the HyperTerminal session without
HyperTerminal” on p. 16).
saving will cause any configuration changes you made to
be lost.

Setting the current date and k To save your changes:

time 1 Return to the Main menu.

2 Press E.
Setting the correct date and time is essential for
proper operation of schedules, trendlogs, and alarms. The BTI Configuration and Diagnostic Utility prompts
you to save changes.
The Date and Time are items S and T on the Change
Configuration screen. The time is entered in 24-hour 3 Press Y and then press ENTER.
format. The utility informs you that the BTI is restarting and
then returns you to the opening screen.
4 Close HyperTerminal.

16 LTBT-TM-BTI
 N e tw or k c onn ec ti ons an d c onf ig ur at io n

Network connections K The BTI operates as a master device on each MS/

TP LAN.

and configuration
K The BTI exerts 1/4 unit load on each MS/TP LAN.
K Matched terminating resistors are required across
(+) and (–) conductors at the last node on each
end of the bus.
This topic provides general information about the
LANs that the BTI supports, with brief summaries of Table 4 MS/TP LAN technical data.
network configuration parameters.
Speed 9.6, 19.2, 38.4, or 76.8Kbps.
For more detailed information on BACnet network
architectures, requirements, and limitations see the Layout Bus (daisy-chain).
Network Installation and Design Guide (LTBT-TM-
Cabling BACnet specifies the following. Shielded, twisted-pair
NETWRK).
cabling with characteristic impedance between 100
For detailed instructions about connecting to the BTI and 130Ω. Distributed capacitance between
conductors must be less than 30 pF/foot (100 pF/m).
and setting device and network parameters, see Distributed capacitance between conductor and
“Initial configuration and setup” on p. 11. shield must be less than 60 pF/foot (200 pF/m). Foil
or braided shield acceptable.

Alerton recommends Connect Air # W221P-2554 or

MS/TP W221P1502, which Alerton has tested and found to
perform well.

This topic provides general information about BACnet Segment 4000 ft. (1071m) per segment using recommended
MS/TP LANs. It provides guidelines for identification, length cable.
termination, and device loading for the four MS/TP
Maximum Depends on classification of devices as master or
LANs that the BTI supports. devices slave. Maximum number of master devices is 128.
overall Maximum number of slave devices or devices overall
(mixed master and slave) is 255. All BACtalk devices
Note Before physically connecting the BTI to MS/TP are masters. See the BACtalk Network Installation and
LANs, use the BTI Configuration and Diagnostic Utility to Design Guide).
set networking parameters. This helps avoid potential LAN Depends on relative unit load of devices (see the
Maximum
conflicts. devices per BACtalk Network Installation and Design Guide).
segment

Repeaters Available from Alerton (MS/TP-REP). Required at

4000 ft. or once maximum nodes per segment is
Overview reached, whichever comes first. Maximum of 3
repeaters between any 2 devices.

MS/TP is a LAN standard designed specifically for Terminating Matched precision resistors required at each end of
BACnet applications. MS/TP uses the EIA–485 resistors segment bus wired across (+) and (-). Recommended
precision resistors rated 120 Ohm 1/4W ±5%.
signaling standard on twisted-pair cabling in a simple
bus (daisy-chain) configuration. MS/TP LANs typically Shield Ground shield drain at single point earth (panel)
support Alerton BACtalk VLCs or other manufacturers’ grounding ground, not VLC ground. Tape shield drain at other
end. Tie shield drain through at each VLC. See the
unitary controllers. Network and Installation Design Guide (LTBT-TM-
NETWRK) for more information.

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 BA C t alk I nt egr a t or (BTI)—I nst a llat io n an d O pe r at io ns G u ide

Terminating cable K Transmission speed. Individually configurable to

9.6, 19.2, 38.4, or 76.8 Kbps. If other devices with
configurable transmission speeds populate the
Terminals for MS/TP cable are on the left side of the MS/TP LAN (such as a Viewport), ensure that all
unit and identify MS/TP LANs A, B, C, and D. Each transmission speeds match.
LAN has + and – terminals. Use the alphabetic
designations to identify LANs when you set up
network parameters using the BTI Configuration and
Diagnostic Utility.
Ethernet
This topic provides general information about the BTI
Caution! Maintain polarity of MS/TP cabling throughout BACnet Ethernet LAN connection. If your installation
the LAN. uses Ethernet to support “Annex J” BACnet/IP
connections, see “BACnet/IP over Ethernet” on p. 19
BTI for configuration information.

Data +

Overview
Data -
MS/TP cable

Shield Drn.
Ethernet is a high-speed LAN widely installed in
Ground screw
commercial buildings.The BTI has an onboard
(enclosure or other) to Ethernet network interface card (NIC) that supports
known earth ground 10Base-T and 100Base-TX Ethernet connections.

Fig. 10 MS/TP cable terminations.

Connection
MS/TP configuration parameters
10Base-T and 100Base-TX Ethernet networks use four
conductors (two twisted-pair cables) to carry the
network signal. The first pair carries the transmit
Connect a personal computer and work within the BTI signal positive and negative; the second pair carries
Configuration and Diagnostic Utility to set the the receive signal positive and negative.
following parameters for each MS/TP LAN.
The pin assignments specified by the Ethernet
K BACnet Network Number. Sets the BACnet standard for an RJ-45 jack1 are shown in Fig. 11.
network number for the Ethernet LAN. Each
These are also the pin assignments for the NIC on the
interconnected BACnet network must have a
network number unique throughout the BTI.
internetwork. Choose a number in the range 1–
Use an approved Category 5 Ethernet drop cable to
65,534.
connect the BTI to an Ethernet hub or switch. The BTI
K MAC address. Each device on a given network
must have a unique MAC address so that all supports 100 Mbps transmission speeds.2
devices on a BACnet internetwork have a unique
MAC address/Network Number combination. 1. The designation of RJ-45 is widely misused. Instead, it is helpful to
refer to jacks by the number of positions and active conductors used.
The BTI jack shown in Fig. 11 is an 8-position, 4-conductor (8p-4c).
2. 100 Mbps transmission speeds are greatly dependent on sound end-
to-end network design practices. To take advantage of 100 Mbps
transmission, ensure that all components, cabling, and installation
practices are sufficient to support 100 Mbps.

18 LTBT-TM-BTI
 N e tw or k c onn ec ti ons an d c onf ig ur at io n

K Ethernet Enabled (YES | NO). Enables or disables

Note A jack is always the receptacle (female) for a Ethernet support. Set to NO for stand-alone
connector (male). Jack pin designations are always shown operations.
from the perspective of looking into the jack. K BACnet Over Ethernet Enabled (YES | NO).
Determines whether the BTI sends BACnet packets
over Ethernet. Set to NO only if the BTI uses IP
Pin Assignment communications only, which may be required if
network administrators disallow BACnet packets
1 Transmit + on enterprise networks. In this case, set this value
PR1 PR2
XMIT RCV to NO, ensure that IP Enabled is YES and that
2 Transmit –
each BTI, or other global controller to
_ _
+ + communicate locally, has IP parameters set up
3 Receive +
correctly. See “BACnet/IP over Ethernet” for IP
6 Receive – details.

1 2 3 4 5 6 7 8 K Network Number. Sets the BACnet network

number for the Ethernet LAN. Each interconnected
BACnet network must have a network number
unique throughout the internetwork. Selecting a
number in the range 1–65,534 is highly
Fig. 11 Pinouts for BTI’s onboard Ethernet jack (RJ-45).
recommended for flexibility and future
compliance, although true range is 0–65,535.
Table 5 Twisted-pair Ethernet facts.

10/100 Mbps at the BTI.

BACnet/IP over Ethernet
Transmission Speed

Layout Star, with hubs and/or switches connecting

devices.
Cabling Commonly 100Ω 24 AWG Category 5 UTP, The BTI supports “Annex J” BACnet/IP, which enables
which connects to devices using an 8– BACnet messages to run over Internet Protocol (IP)
position, 4-conductor jack (RJ-45).
Wide Area Networks (WAN). If your BACnet
Segment Length Varies depending on manufacturer of devices internetwork runs on an enterprise network connected
of interest. Maximum length of a drop cable
(cable segment from a hub/concentrator to a by IP routers, you can set up the BTI to exchange
device) is 328 ft. (100m.) unless explicitly BACnet data using this network. BACnet messages are
stated otherwise in the manufacturer’s transmitted and received within IP frames.
installation instructions.
Varies depending on the types of hubs used The BTI can function as a BACnet broadcast
Maximum Devices
and the configurations they support. management device (BBMD). BBMDs are key devices
Terminating Resistors None required, internal to device. in a BACnet/IP setup. The BBMD sits on a BACnet
subnet and is responsible for re-broadcasting
messages that it receives over IP to other BACnet

Configuring Ethernet network

devices on its subnet. Each BBMD keeps a table of the
IP addresses of other BBMDs so they can share data
over the IP WAN.
parameters Essentially, BBMDs make the IP WAN look like a
single BACnet internetwork to BACnet devices. Setting
Connect a personal computer and work within the BTI
IP Networking parameters in all internetworked
Configuration and Diagnostics Utility to set the
BBMDs correctly is critical to system success. Table 6
following parameters for Ethernet.
on p. 21 provides an explanation of IP settings in the
BTI.

LTBT-TM-BTI 19
 BA C t alk I nt egr a t or (BTI)—I nst a llat io n an d O pe r at io ns G u ide

project to help you determine IP networking parameters

Important! For more detailed information about BACnet/
that will work. Their expertise and insight during the
IP, including architecture diagrams and different setup
planning phase will save countless hours later in the
scenarios, see the BACtalk Network Installation and
project. If no such professional is available, you will need to
Design Guide (LTBT-TM-NETWRK).
set IP network parameters on your own. If this is the case,
research on IP internetworks and the BACnet/IP Annex J
With BACnet/IP enabled and correctly configured in implementation is recommended, but you can use
the BTI, BACnet data from throughout the BACnet IP/ “cookbook” settings if there is no chance of conflicting with
WAN is available. In addition, BACtalk operator other enterprise applications.
terminals connected anywhere on the WAN can
“register” with the BBMD to participate on the BACnet
network and receive BACnet messages. The operator
terminal only needs to know the IP address of the
BBMD to do this. For details about setting up IP
Configuring BACnet/IP
parameters in the BACtalk operator terminal, see
BACtalk online help and the BACtalk Installation and
parameters
Administration Guide (LTBT-TM-BTWADMN).
BACnet/IP settings rely first on correct Ethernet
network settings and connections. See “Ethernet” on
Caution! Setting up a BACnet system on an IP p. 18 for details about setting up Ethernet network
internetwork requires close coordination with IT and parameters. See Table 6 on p. 21 for details about
networking professionals who maintain the network. Seek each setting.
out contacts in this profession as early as possible in the

Fig. 12 IP Configuration screen in the BTI Configuration and Diagnostic Utility.

20 LTBT-TM-BTI
 N e tw or k c onn ec ti ons an d c onf ig ur at io n

Table 6 BACnet/IP settings in the BTI.

Field Values Remarks

Ethernet Enabled Y|N (Ethernet parameter appearing on Change Configuration Screen.) Must be set to YES. See “Ethernet” on
p. 18.

BACnet Over Ethernet Y|N (Ethernet parameter appearing on Change Configuration Screen.) Setting is inconsequential to IP
Enabled messaging. Can be set to N if IP messaging only is a requirement. See “Ethernet” on p. 18.

IP Enabled? Y|N K Y = Enables IP support.

K N = Disables IP support. Default.

If the BTI is on an Ethernet LAN but does not use IP, ensure that IP Enabled = N (or that IP Address =
000.000.000.000). This prevents the BTI from sending any IP messages over the LAN. Default is ON, but IP
Address defaults to 000.000.000.000. IP won't run until IP Address is set.

IP Frame Type? DIX | 802.2 The Ethernet frame type used for incoming and outbound IP transmissions. The primary difference between
frame types is the LLC header.

K DIX = The BTI generates and routes DIX (Ethernet II) frames. Default.
K 802.2 = The BTI generates and routes 802.2 (also known as 802.3/802.2-not RAW Ethernet) frames.

Reassembly Timeout 1-300 The fragment reassembly time-out, in seconds. Default is 120.

Maximum MTU 90-1500 The Maximum Transmission Unit (MTU) in bytes. Default is 1500 (typical for Ethernet networks).

Time to Live 001-255 Sets the initial Time to Live (TTL) value for IP packets sent from this device. TTL enumerates the number of
hops (the number of forwarding routers) the packet is allowed to pass between source and destination. This
prevents looping packets from crashing routers and saturating entire links or networks. Default is 64.

Type of Service 0,1,2,4,8,15 Sets the 4-bit type of service (TOS) value in the IP packet header. Some applications may use TOS to
provide precedence levels and determine optimum routing methods for packets. Default is 0

Value TOS bits Description

0 0000 Default

1 0001 Minimize monetary cost

2 0010 Maximize reliability

4 0100 Maximize throughput

8 1000 Minimize delay

15 1111 Maximize security

Virtual Net Number 1-65,534 The BACnet Network Number that is assigned to the "virtual network" created by the IP WAN. All BBMDs
participating on the IP WAN (in other words, all BBMDs in the broadcast distribution table) must have this
Virtual Net set to the same number. This Network Number must also be unique with respect to
internetworked BACnet LANs. It cannot match other BACnet Network Numbers (Ethernet LANs, MS/TP
LANs, ARCNET LANs, etc.) Default is 1.

IP Address nnn.nnn.nnn.nnn The IP address assigned to this device in dotted-decimal format. nnn is a number from 0-255. Follow IP
addressing conventions and rules for your network. Default is 000.000.000.000, which prevents IP operation
event when IP Enabled? = Y.

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Table 6 BACnet/IP settings in the BTI. (Continued)

Field Values Remarks

UDP Port 47808-47823 The UDP port of this controller, which is used to establish connectionless transmission over IP with other
recommended BACnet/IP-enabled controllers. This UDP port must be the same as other BACnet/IP-enabled controllers
on the same subnet, especially if the controllers exchange messages only using BACnet/IP (BACnet/Eth =
NO).

There are notable exceptions to this rule:

K When another BBMD is on the same subnet, the UDP ports of the BBMDs must be different.
K Any device on the same subnet that registers with the BBMD as a foreign device (such as a BACtalk
operator terminal) must have a different local UDP port from the BBMD.

Only those controllers with same UDP port on a subnet will exchange BACnet/IP messages. For best
results, always ensure that controllers on an internetwork use the same UDP ports."

Subnet Mask nnn.nnn.nnn.nnn The netmask value for transmission on this network in dotted-decimal. Follow IP netmasking conventions
and rules. Default is 255.255.255.000, which is typical.

Gateway 1 Address nnn.nnn.nnn.nnn The IP address, in dotted-decimal, of the primary IP router the BTI uses to connect to the IP internetwork.
nnn is a number from 0-255. Default is 000.000.000.000, indicating no device.

Gateway 2 Address nnn.nnn.nnn.nnn Optional. The IP address, in dotted-decimal, of the secondary IP router the BTI uses to connect to the IP
internetwork. nnn is a number from 0-255. Default is 000.000.000.000, indicating no device.

Server IP Address nnn.nnn.nnn.nnn Optional. The IP address, in dotted-decimal, of the device that functions as the broadcast distribution table
(BDT) server to this device. This BBMD can retrieve its routing table from the BDT Server if its own BDT is
lost for any reason. If left to 000.000.000.000, the BDT must be re-entered manually. For this reason, the IP
address of the BDT Server should appear in its own routing table.

Server UDP Port 47808-47823 The UDP port of the broadcast distribution table (BDT) server defined under Server IP Address.
recommended

Broadcast Distribution Table (BDT) entries

The broadcast distribution table (BDT) contains three associated entries for each BBMD on the IP Virtual Net being defined. A maximum of 32 devices is
supported. Each BBMD should have an entry for itself in its BDT. The three entries must be assigned for each BBMD on the Virtual Network. For each BBMD,
the first entry identifies the IP address, the second the UDP port associated with the BBMD, and the third the netmask used on the BBMD's subnet. Usually,
BBMDs have identical BDTs because one is set up as the BDT server (see “Server IP Address” and “Server UDP Port” herein).

BBMD n IP Address nnn.nnn.nnn.nnn Each entry is the IP address of a BBMD on the IP virtual network.

BBMD n UDP Port 47808-47823 Each entry is the UDP port of the BBMD of interest. This is the same value set up as the “UDP Port” in the
recommended BBMD of interest.

BBMD n Subnet Mask nnn.nnn.nnn.nnn Each entry is used as a mask on the network of the BBMD of interest. Typically set to 255.255.255.255 (the
default), which indicates that BACnet/IP messages go only to the BBMD of interest and to no other devices
on the subnet. Caution! Changing this setting (most commonly to 255.255.255.0) is a common cause of IP
routing issues, since most IP routers will not allow messages to be forwarded to multiple devices as a
security precaution. In nearly all applications, leave this setting to the default 255.255.255.255.

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 N e tw or k c onn ec ti ons an d c onf ig ur at io n

Point-to-point (PTP) connection of a BACtalk operator terminal and

PTP interface to other BACnet-compliant systems.
K Optional onboard modem. V.32bis and V.42,
Point-to-point (PTP) connection is unique to BACnet allowing communications up to 56Kbps with
and is not a LAN. It is defined either as a dial-up or compression over normal voice grade telephone
direct connect network. lines. Direct connect implementation is through the
use of EIA–232 cabling and signals. PTP in
The BTI supports either of two PTP connection BACtalk enables remote communications for off-
methods, but not both simultaneously: site monitoring, alarm dialout, and direct connect
scenarios.
K Direct-connect using the EIA-232 port (male DB-9)
on the lower left of the BTI. Supports remote site

Fig. 13 PTP Configuration screen in the BTI Configuration and Diagnostic Utility.

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Table 7

Field
PTP settings.

Values Remarks
Connecting a BACtalk
Virtual Network
Number
1-65534 The virtual network number the
BTI uses for PTP. Must be
operator terminal and
unique. No other network can
have this network number on
any network that will
downloading rreal-time
eal-time
operating code
interconnect.

PTP Password 1-8 alpha- A case-sensitive PTP password

numeric restricting remote access to the
characters BTI. Set the password and make a
note of it. When you set up an A BACtalk operator terminal can connect to the BTI
outbound connection in the over the BACnet Ethernet connection or over a PTP
Connection Manager of BACtalk
serial or modem connection.
for Windows, you need to provide
this password. If no password is After you connect a BACtalk for Windows operator
entered here, access is
unrestricted. terminal, scan the network for the BTI and then
download the real-time operating code (ROC) to the
PTP direct-connect settings (EIA-232 Connector)
device.
Direct EIA-232 Y|N Enables/disables inbound
In Enabled connections through the EIA-232 A ROC download is only necessary if the OMF LED
port. indicates a trouble condition (see Table 8) or if a more
recent ROC than is listed in the opening screen (see
Direct EIA-232 9.6, 38.4, 57.6, Sets the transmission rate for EIA-
Kbps 115.2 232 communications. Ensure that Fig. 8 on p. 14) is available.
settings on the other end of the
connection match. See BACtalk Online Help and the BACtalk Operator’s
Manual (LTBT-MAN-OP) for details about scanning
Direct Bridge ON | OFF On enables the BTI to poll the
networks for devices and sending data and objects to
EIA–232 line for an existing PTP
connection, typically used when devices.
integrating with BACnet-compliant
equipment (chillers, boilers, etc.)

Troubleshooting and
over the PTP connection. OFF
disables the BTI from polling, but
doesn’t disable the port.

Direct Speaker ON | OFF Not used.

Modem Settings (BTI-MDM only)

maintenance
Modem In Y|N Enables/disables inbound
Enabled connections over modem. Set to Y This topic provides instructions for interpreting
to support dial-up connections of a diagnostic LEDs on the BTI, replacing components,
BACtalk operator terminal. Set to and using special procedures.
N for outbound alarm dial-out only.

Modem Y|N Enables/disables the modem

Speaker speaker.

Modem Kbps 38.4 Set to 38.4.

24 LTBT-TM-BTI
 Tr o uble sh oot in g a nd m ain t ena nce

Using diagnostic LEDs Replacement parts and

The BTI has four status LEDs for diagnostic purposes.
These LEDs are located on the lower left side of the
accessories
BTI. Power and Battery LEDs in the upper right corner Table 9 Replacement parts and accessories for the BTI.
indicate power status.
Alerton Part Number Description
In additon, when objects and real-time operating
code (ROC) are cleared using the DIP switches SW 1, AC-2650 Configuration cable
these LEDs indicate status. See “Using DIP switches to BTI-BAT-12V 12V gel-cell battery (battery and connection
clear data” on p. 26. harness only)

Table 8 LED description. BT-3.0V-1225 3.0 volt lithium coin-cell battery (CR1225 or
equivalent)
LED Description
BT-1.0A-5X20 Onboard 1 Amp GDB fast-acting fuse (5mm
X 20mm)
POWER Indicates status of 24 VAC power.

K ON = 24 VAC power is provided to the

Coin-cell battery
unit.
K OFF = 24 VAC power is disconnected.

replacement
BATTERY POWER Interpret this LED together with the POWER
LED.

K ON and POWER LED OFF = Unit is running

on gel-cell battery power. The onboard lithium coin-cell battery provides power
K ON and POWER LED ON = Unit is in for the real-time clock when 24 VAC power is
bootup routine. unavailable. See Table 9 for Alerton part number.
K OFF and POWER LED ON = Unit has 24
VAC power. For best results, replace every three years as a
K OFF and POWER LED OFF = Unit has no
guideline.
power.

CPU FLASHES when the CPU is operational. Note Standby battery life is approximately 10 years, with
that under heavy CPU activity, this LED may 1.5 years of cumulative backup capability. Battery life
flash rapidly enough to appear steady ON. OFF varies depending on application.
indicates a CPU fault—contact your Alerton
representative. k To replace the coin-cell battery:
SYS K ON = Normal. System boot code is loaded
1 Remove power and communications connections.
and operational.
K OFF = Fault condition. Contact your Alerton 2 Remove the unit from its mounting.
representative.
3 Remove the BTI cover to expose the battery.
OMF K ON = Normal. Real-time operating code is
loaded and operational. 4 Remove the battery from its retaining clip using a
K OFF = Real-time operating code not small, flat-tipped screwdriver.
loaded, BTI is operating in router-only
mode. Connect with BACtalk for Windows 5 Slide the new battery under the clip, with the positive
and download. side facing up.
DDC K ON = DDC loaded and executing. 6 Replace the BTI cover.
K OFF = No DDC loaded. Connect with
BACtalk for Windows and download DDC 7 Return power to the BTI.
file.

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8 Open the BTI Configuration and Diagnostic Utility to 3 Place the meter’s positive lead into the "D"-shaped
reset the date and time (see “Setting the current date connector shroud on the end of the gel-cell power plug
and time” on p. 16). and the negative meter lead into the square shroud.

9 Return communications to the BTI. 4 If the meter reads 12.5 volts or less, replace the
battery.

Gel-cell battery replacement Using DIP switches to clear

data
The gel-cell battery provides power to the BTI in the
event of extended brownouts or power outages. It
keeps the BTI fully operational for approximately five
minutes, allowing for data backup and an orderly DIP switches SW1 on the lower-left of the BTI can be
shutdown. See Table 9 for Alerton part number. used in conjunction with the Reset button to clear the
BTI of DDC, objects, and automation features, or to
clear real-time operating code (ROC) along with
Warning! Use only Alerton part number BTI-BAT-12V as
these items.
a replacement.

Important! Procedures here require that valid system

The battery is continuously charged by a charging
boot code is operational. These procedures are not
circuit internal to the BTI which maintains the battery
effective if the SYS LED indicates a problem (see Table 8).
at a floating charge level. The gel-cell’s cabling
In this case, contact your Alerton representative.
harness allows the charging circuit access to the
battery cells.

The gel-cell battery assembly should be tested

regularly and replaced approximately every two years Clearing DDC, objects, and
to maintain optimum backup capability. Battery life
varies depending on the appication environment.
automation setups
When would I clear DDC, objects, and automation setups? In
Testing the gel-cell battery rare circumstances, DDC, objects, or automation
setups may become corrupted and you are unable to
For reliable operation, periodically test the gel-cell delete the objects using normal methods (typically,
battery with a digital Volt-Ohm meter to ensure the from the BACtalk operator terminal). Indications of
gel-cell provides better than 12.5 volts. this:

k To test the gel-cell battery: K You are unable to delete or change objects
through normal methods to remedy the issue.
1 Disconnect the gel-cell battery from the BTI. The
K DDC and objects in the BTI are missing, erratic, or
power plug on the battery locks into the jack on the return inexplicable data.
BTI. Depress and hold the locking latch while
In these cases, clear DDC, objects, and automation
withdrawing the plug from the jack.
setups as a first step and then reload them. If this is
2 Set the digital Volt-Ohm meter to DC volts. unsuccessful, move on to clear the real-time operating
code (ROC) and then reload it.

26 LTBT-TM-BTI
 Tr o uble sh oot in g a nd m ain t ena nce

k To clear DDC, objects, and automation setups: When would I clear ROC? In rare circumstances, the ROC
may become corrupted and you are unable to delete
1 Set DIP switch 4 on SW1 ON.
or overwrite the ROC by downloading a ROC file
2 Press the Reset button. from a BACtalk operator terminal. Clearing ROC may
All four status LEDs show steady ON. also be advised if you cleared DDC, object, and
automation setups and are still experiencing trouble.
3 Within two seconds, while all four status LEDs are Indications of ROC issues:
steady ON, press Reset again.
K You are unable to delete or change objects
The CPU light shows steady ON, then flashes, and the through normal methods or by clearing DDC,
SYS and OMF LEDs should show steady ON. objects, and automation setups.
K BACnet devices (such as BACtalk for Windows)
are not able to recognize the presence of the BTI
Clearing real-time
real-time operating code on the network when all other network
parameters are set correctly and the connection is
sound.
In addition to clearing DDC, objects, and automation
k To clear ROC aalong
long with all DDC, objects, and automation
setups, this procedure also clears the real-time
operating code (ROC) from the BTI. After clearing the setups:
ROC, connect a BACtalk for Windows operator 1 Set DIP switch 3 on SW1 ON.
terminal to load a new ROC. See “System boot code
and real-time operating code” on p. 9 for details
2 Press the Reset button.
about ROC function. All four status LEDs show steady ON.
3 Within two seconds, while all four status LEDs are
steady ON, press Reset again.

LTBT-TM-BTI 27
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