DISOBOX A/D Converter Unit

• Local weighing electronics,

protected to IP 65

• One measuring channel /

load cell

• Monitoring of single load

cells

• Electronic corner adjustment

• Digital transmission of
measurement values

• Fieldbus connectivity

• All components exchange-

able without recalibration /
reverification

• Perfectly compatible with

Schenck weighing
electronics, legal-for-trade
PC programs and/or
standard PLC
Application Equipment

The Schenck DISOBOX is designed as These features make DISOBOX ideally DISOBOX is equipped with max. 8
multi-channel local analog-to-digital suitable as data acquisition and control measuring channels (as a function of
converter unit. unit for weighing systems combined with type). To every channel, a load cell can
Since the output signals of all connected Schenck weighing electronics of the be connected. Access to individual
load cells are digitalised individually, the DISOMAT family and/or PC-based signals enables every load point to be
measuring voltage of every cell can be weighing systems. calibrated individually (electronic corner
accessed at any time. Typical applications are road adjustment) with no need to open the
This is of particular benefit weighbridges and hopper scales. box.
- upon commissioning (dead load
distribution analysis, electronic The integrated weighing functions also Every channel has its own highly
corner adjustment) enable its use as complete multi-channel resolving A/D converter (no multiplexer).
- in operation (analysis of load scale, e.g. combined with a PLC system. Therefore, DISOBOX is also suitable for
distribution on scale, load cell measurement and control of fast
monitoring) processes, e.g. feed operations.
- and in case of fault (quick The integrated I/O signals enable time-
identification of affected component). critical signals, e.g. overload interrupt, to
The digital signal transmission via be controlled direct, bypassing the
standard fieldbus system can be planned connected control systems.
easily, quickly and reliably.

BV-D2207GB
The individual load cell signals are available at any Configuration / Calibration
time also during operation and can be used, e.g. for
sensor monitoring or prompt detection of error Combined with Schenck systems (DISOMAT, DISOVIEW E
source. PC program), system is configured and calibrated using the
connected Master. For more comprehensive configurations,
The measuring channels can be organised into e.g. for combination with external systems, the DISOPLAN
three independent groups, with every group configuration program is used. This program enables access
corresponding to a complete, legal-for-trade scale to all parameters and complete calibration and readies a
with weight display, if required.
- Filtering of weight values
- Status acquisition (no-motion, ...) Furthermore, the complete status of a DISOBOX can be
- Tare memory read out (backup) and reloaded into a same-type or
- Zero set replacement unit (restore).
- Multi-range/multi-divisional functions
(3 ranges) DISOPLAN DISOBOX runs under any commercial Windows
- Zero point tracking version ( from WIN 95 onward). Communication with
- ... DISOBOX unit(s) takes place
- point to point
Combined with DISOVIEW E, the legal-for-trade PC - via RS 485 bus
software, more scales can be realised (see below). - via Ethernet

Communication

All measurement values (channel values and scale

weights) can be transferred to host system via
serial interface.
The available option cards ensure flexible adaption
to any industrial communication system:
- Asynchronous interface card
RS 232/485, MODBUS protocol
- Profibus DP-V0. Process image
mechanism with 32-byte data width,
12 Mbaud max. data rate
- DeviceNet
- Ethernet. The Ethernet card supports http
(web browser) and Modbus-TCP protocols
which enables system-wide communica- Verification
tion using an existing Ethernet
infrastructure. Furthermore, configuration, DISOBOX is EU-approved as legal-for-trade weighing
monitoring and diagnosis can be accessed system, both as A/D converter module in combination with a
via Intranet / Internet without additional DISOMAT B plus or the Schenck PC software DISOVIEW E,
cabling, or modem, etc. and as standalone unit, e.g. combined with a suitable display
(Access from the outside, e.g. via Internet, and control unit.
can be limited, or disabled, by granting
respective privileges.) The approval allows the complete active electronics to be
replaced in case of fault, with no need for recalibration or
In addition to the communication interface, reverification. All setting and calibration parameters are
DISOBOX readies a second serial interface stored in a non-volatile memory in the passive system part.
(RS 232 / 485 / 422) that can be used, e.g. for Together with the DISOPLAN backup and restore functions,
- configuration downtimes can be avoided.
- serial I/O extension
- secondary or large-size display Since the system is sealed without jumpers, DISOBOX
- printer. normally remains closed. Parameterisation and calibration
are effected via serial interface, stamping uses a
Inputs/Outputs modification counter for relevant parameters, so that no dirt
or moisture can enter into the electronics upon maintenance
The DISOBOX inputs/outputs (4 In / 4 Out, 24 / calibration.
VDC) also enable direct, local process control, for
instance, in form of overload messages, feed DISOVIEW E
contacts or release signals.
Many data intensive weighing applications, e.g. road
weighbridges or group rate control systems, have taken to
employ a PC as powerful and economical platform for data
management and operator prompting – normally still
combined with a conventional weighing electronics for legal-
for-trade display and data storage.
The combination of DISOBOX and legal-for-trade
DISOVIEW E weighing program opens up new - This feature lets you repair systems whose load
possibilities: cells are no longer available. There is no need to
- DISOBOX sits on scale locally. equip the scale with new sensors, simply replace
- Data are digitally transferred to PC free the defective cell. (If your system is legal-for-trade,
from interferences. observe limitation of admissible load cell
- No additional devices near PC combinations, if any).
- DISOVIEW represents the legal-for-trade, - DISOBOX is used in place of the previous cable
convenient and flexible scale on PC summation box. More often than not, the old load
screen direct. cell cable can be used for serial transmission.
- The DISOVIEW application interface Inevitable repair thus becomes an attractive
allows easy access to data and scale upgrade.
functions from user programs.

DISOVIEW E lets you represent up to 8 legal-for- 260

trade scales.
For details on DISOVIEW E, see Spec Sheet
BV-D 2066.

160

Housing height: 90mm

Accessories Fixing screw spacing: 240 x 110 mm,
fastening material is supplied.
DISOBOX is supplied with nominal 24V DC
(admissible range 18 – 36 V). In many cases, this
voltage is available in system. Dimensioned drawing: Power Supply VNT 20410
Optionally, up to three DISOBOX units can be
supplied by additional power supply VNT 20410.
The latter also enables a serial RS 232 interface
( PC-COM) to be converted to RS 485, so that max.
300 m distance to DISOBOX can be bridged.

Designed for simulation of 8 load cells, scale

simulator VWZ 20410 lets you test hardware and
sequences.
46 mm height
Special Applications

Further to the applications described above,

DISOBOX lets you solve tasks that cannot be
realized using conventional weighing electronics:
- If you renounce on single load cell
monitoring, a group of load cells can be
connected to each measuring channel
(observe totals impedance). In this case,
one DISOBOX can acquire the weight of
up to 8 scales (e.g. surge hopper) and
transfer it to a control system.
- Through individual configuration of single
measuring channes, DISOBOX enables a
scale to be designed from load cells of
different rated capacities or sensitivities,
e.g. in case of systems with heavily varying
load on single mounts.
Technical Data

Processor SAB 161

RAM 1 MB Equipment Supplied Type Ordering No.
Flash 2 MB Base units
EEPROM 16 kB DISOBOX base unit, VME 20480 V021988.B01
Clock software, no buffer A/D converter unit with
Display none 8 measuring channels
Keyboard none DISOBOX base unit, VME 20440 V021988.B03
Housing Local plastic housing, A/D converter unit with
protected to IP65 4 measuring channels
Bus cards
No. of measuring channels 1 - 8, as a function of type DeviceNet option, V024870.B01
mounted and wired
Load cell supply 5 V AC Profibus option, V024871.B01
Load cell impedance / 44 – 4000 Ω mounted and wired
channel Ethernet option, V024872.B01
Totals impedance > 44 Ω mounted and wired
Input signal / channel 0 – 19 mV Modbus option, V024873.B01
Scan rate 132 / sec. / meas. channel mounted and wired
Wiring technique 4- or 6-wire Complete unit
VME 20480 with DeviceNet V021988.B11
No. of scales max. 3; assignment of VME 20480 with Profibus V021988.B21
measuring channels to scales VME 20480 with Ethernet V021988.B31
selected at will VME 20480 with Modbus V021988.B41
Minimum signal voltage 0,6µV/d ∗ √n VME 20440 with DeviceNet V021988.B13

BV-D2207GB 0406 We reserve the right to discontinue or change specifications or designs at any time without notice or obligation..
n: number of measuring VME 20440 with Profibus V021988.B23
channels / scale VME 20440 with Ethernet V021988.B33
No. of increments in N ≤ 8.000d VME 20440 with Modbus V021988.B43
certified applications
Accessories
Multi-range / multi- 3 ranges,
Power supply / serial VNT 410 V028209.B01
divisional scales N ≤ 8.000d each
adapter IP20
Emax/dmin ≤ 15,000d
Adapter cable RS 232 Ù V029499.B01
USB
Power supply 24 VDC (18 - 36 V)
Load cell simulator, VWZ 410 V024383.B01
Required power max. 5 Watt 8-channel
DISOPLAN DISOBOX VPL 20490 V029764.B01
Operating temperature, -10 - +40 °C
legal-for-trade
Storage temperature, -30 - +60 °C
non-legal-for-trade

Binary outputs 4 x 24 V galv. isolated

Inputs 4 x 24 V galv. isolated or
2 x 24 V galv. isolated + 2 x
NAMUR

Serial interface RS 232 / 485

9600 – 115.000 baud
Fieldbus interfaces Profibus
DeviceNet
Ethernet
MODBUS

Measuring and Process Systems

SCHENCK PROCESS GmbH
D-64273 Darmstadt
Telefon: +49 (0) 61 51-32 10 28
Fax: +49 (0) 61 51-32 11 72
E-mail: bvk.process@schenck.net
www.schenck-process.de