DTC231

selec Operating Instructions

SAFETY PRECAUTIONS
All safety related codifications, symbols and instructions
3. Since this is a built-in-type equipment (finds place in main
control panel), its output terminals get connected to host
equipment. Such equipment shall also comply with basic
For bigger loads, use interposing relay / contactor

L N
OP496-V01

that appear in this operating manual or on the equipment must TC

be strictly followed to ensure the safety of the operating EMI/EMC and other safety requirements like BSEN61326-1
and BSEN 61010 respectively. TC Contactor
personnel as well as the instrument.
If the equipment is not handled in a manner specified by 4. Thermal dissipation of equipment is met through C NO
the manufacturer it might impair the protection provided by the ventilation holes provided on chassis of equipment. Such R C

equipment. ventilation holes shall not be obstructed else it can lead to a MOV
Snubber
safety hazard. C
Read complete instructions prior to installation and 5. The output terminals shall be strictly loaded to the LOAD
operation of the unit. manufacturer specified values / range.

MECHANICAL INSTALLATION ELECTRICAL PRECAUTIONS DURING USE

WARNING : Risk of electric shock.
Electrical noise generated by switching of inductive
72 x 72 loads can create momentary disruption, erratic display,
WIRING GUIDELINES
latch up, data loss or permanent damage to the
PARAMETER SPECIFICATIONS WARNING : instrument.
Display 3 digit, 1. To prevent the risk of electric shock power supply to the To reduce noise :
B D F
7 segment digital display equipment must be kept OFF while doing the wiring a) Use of snubber circuits across loads as shown above,
arrangement. Do not touch the terminals while power is is recommended.
LED Indications R : Control output ON being supplied. b) Use separate shielded wires for inputs.
A G
2. To eliminate electromagnetic interference use short wire E C
Keys 3 keys for digital setting
with adequate ratings; twists of the same in equal size shall MODEL DIM A B C D E F G TERMINAL CONNECTIONS
INPUT SPECIFICATIONS be made. For the input and output signal lines, be sure to
DTC231 72 72 83.7 67 4.5 69 69 TC +
use shielded wires and keep them away from each other. L (+) 1 8
Input Signal Thermocouple (J, K) 3. Cable used for connection to power source, must have a 1. Prepare the panel cutout with proper dimensions as shown -
N( ) 2 9
cross section of 1mm2 or greater. These wires shall have above. TC
-
Sampling time 250 ms insulation capacity made of at least 1.5kV. 2. Fit the unit into the panel with the help of clamp given. 3 10
4. When extending the thermocouple lead wires, always use 3. The equipment in its installed state must not come in close 4 11
Input Filter (FTC) 0.2 to 10.0 sec thermocouple compensation wires for wiring. proximity to any heating sources, caustic vapors, oils,
5. A better anti-noise effect can be expected by using steam, or other unwanted process by-products. 5 12
NO
Resolution Fixed 1° resolution standard power supply cable for the instrument. 4. Use the specified size of crimp terminals (M3.5 screws) to 6 13
o
wire the terminal block. Tighten the screws on the terminal
Temperature Unit C / °F selectable MAINTENANCE 7 14
block using the tightening torque within the range of 1.2 COM
1. The equipment should be cleaned regularly to avoid N.m.
Indication Accuracy 0.25% of FS ±1°C
blockage of ventilating parts. 5. Do not connect anything to unused terminals. Use only the correct thermocouple wire or
(20 min of warm up time)
2. Clean the equipment with a clean soft cloth. Do not use compensating cable from the probe to instrument
Isopropyl alcohol or any other cleaning agent. terminals avoiding joints in the cable if possible.
FUNCTIONAL SPECIFICATIONS EMC GUIDELINES Failure to use the correct wire type will lead to
INSTALLATION GUIDELINES 1. Use proper input power cables with shortest connections inaccurate readings.
Control Method ON-OFF control and twisted type. Ensure that the input sensor connected at the
1. This equipment, being built-in-type, normally becomes a 2. Layout of connecting cables shall be away from any terminals and the input type set in the temperature
Hysteresis Width 0.1 to 99.9°C part of main control panel and in such case the terminals do controller configuration are the same.
internal EMI source.
not remain accessible to the end user after installation and
OUTPUT Internal wiring.
LOAD CONNECTIONS FRONT PANEL DESCRIPTION
CONTROL OUTPUT Relay contact (SPST) 2. Do not allow pieces of metal, wire clippings, or fine metallic
1. The service life of the output relays depends on the
Relay 10A@250V AC / 30V DC, fillings from installation to enter the product or else it may
switching capacity and switching conditions. Consider the DTC231

Resistive lead to a safety hazard that may in turn endanger life or

actual application conditions and use the product within the
cause electrical shock to the operator. R

POWER SUPPLY rated load and electrical service life. 2

3. Circuit breaker or mains switch must be installed between
power source and supply terminals to facilitate power 'ON' 2. Although the relay output is rated at 5/10 amps it is always
Supply Voltage 85 to 270V AC/DC necessary to use an interposing relay or contactor that will 3
or ‘OFF’ function. However this switch or breaker must be
(AC : 50 / 60 Hz ) switch the load. This avoids damage to the controller in the
installed in a convenient position normally accessible to the
operator. event of a fault short developing on the power output circuit.
Power Consumption 4 VA max 3. Always use a separate fused supply for the “power load
4. Use and store the temperature controller within the
Temperature Operating : 0 to 50°C specified ambient temperature and humidity ranges as circuit”and do not take this from the live and neutral
terminals supplying power to the controller. 1 Process-value (PV)/ 1) Displays a process value (PV).
Storage : -20 to 75°C mentioned in this manual. 2) Displays the parameter symbols
Parameter name
at parameter setting mode for
For load current less than 0.5A display
Humidity 95% RH (non-condensing) CAUTION 1 sec. and then parameter values.
3) Displays PV error conditions.
L N (refer Table 2)
Weight 170 g 1. When powering up for the first time, disconnect the
output connections. TC 4) Displays a set value (SV)
Set-value (SV)
TC when key pressed.
2. Fuse Protection : The unit is normally supplied without a
LOAD The LED is lit when the control
power switch and fuses. Make wiring so that the fuse is C NO 2
Control output
indication output is ON
placed between the mains power supply switch and the R C
controller. (2 pole breaker fuse - rating : 275V AC,1A for MOV 1) Auto tune : Blinking at faster speed.
3 Tune 2) Self tune : Blinking at slower speed.
electrical circuitry is highly recommended) Snubber
Doc. name : OP INST DTC231 OP496-V01(Page 1 of 2)
 USER GUIDE CONFIGURATION INSTRUCTIONS CALIBRATION CERTIFICATE
1. Display Bias : This function is used to adjust the PV KEY
value in cases where it is necessary for PV value to FUNCTIONS
ONLINE CONFIGURATION MENU Date :
agree with another recorder or indicator, or when the
sensor cannot be mounted in correct location. Ø
Press for 3s to enter configuration menu Ø
To view previous parameter Model No :

2. Filter Time Constant : The input filter is used to filter Ø

To view next parameter
out quick changes that occur to the process variable Ø
Press for 3s to exit configuration menu Claimed Accuracy : 0.25% of FS ±1°C
in a dynamic or quick responding application which (20 min of warm up time)
causes erratic control. Ø
To view SP (Set point)
The digital filter also aids in controlling processes
where the electrical noise affects the input signal. + Ø
To increment / decrement SP Ø
To increment / decrement Parameter value Sources calibrated against :
Larger the value of FTC entered, greater the filter
/
added and the slower the controller reacts to the Ø
process and vice versa. + Press for 3s to enter protection level

Multimeter calibration report no :

3. ON/OFF control action (For Reverse Mode) : OPERATIONAL MENU
The relay is ‘ON’ up to the set temperature and cuts
‘OFF' above the set temperature. As the temperature
POWER ON The calibration of this unit has been verified at the
of the system drops, the relay is switched ‘ON' at a
following values :
temperature slightly lower than the set point.
SENSOR VERIFICATION
HYSTERESIS : DTC231 SELECTION VALUE (°C)
The difference between the temperature at which ~25.0
relay switches ‘ON’ and at which the relay switches Press key for 3 sec. R
‘OFF’ is the hysteresis or dead band. K ~475.0
Temp. overshoot ~975.0
Hysteresis
set point The thermocouple curves are linearized in this
Reverse microprocessor based product; and hence the values
Level 1
interpolated across the input range are also equally
Display Default
Description Range accurate ; at every point in the curve.
(For 1sec) Value
Output ON OFF ON Time Input type J/K Unit is accepted as accuracy is within the specified
(Refer Table 1)
Temp. Hysteresis limit of claimed accuracy and certificate is valid upto
set point
Temperature unit °C/°F Press + keys for 3 sec. one year from the date of issue.

Set point low limit Min range of sensor

Forward CHECKED BY :
selected to SP.H
Set point SP.L to Max range Protection Level
Output OFF ON OFF Time high limit of sensor selected Display Default
Description Range
(For 1sec) Value
Filter time 0.2 to
constant Lock setpoint UNK/LCK
(Refer user 10.0 sec
guide) Lock UNK/LCK
configuration
Control action RE/FD menu
Hysteresis 0.1 to 99.9° NOTE
Display bias 1. Locking parameters (LV1 / SP) will not permit
(Refer -19.9 to
19.9° change in the value of respective level parameters.
user guide) 2. Continuous operation of / keys for SP or + /
Factory default for other parameters makes update speed faster in
(Reset all) NO/YES 3 stages after 3 seconds.

Table 1 : INPUT RANGE Table 2 : ERROR DISPLAY

When an error has occurred, the display indicates error
FOR THERMOCOUPLE (Specifications are subject to change, since development is
codes as given below.
Control Output a continuous process.)
INPUT TYPE RANGE Error Description
Status
Resolution : 1 UNIT Selec Controls Pvt. Ltd., India
Sensor break /
Over range condition OFF Factory Address :
J -199 to 750 °C
Sensor reverse / EL-27/1, Electronic Zone, TTC Industrial Area, MIDC, Mahape,
-199 to 999 °F OFF
Under range condition Navi Mumbai - 400 710, INDIA.
-199 to 999 °C Tel. No. : +91-22-41 418 419/430 | Fax No. : +91-22-28471733
K Toll free : 1800 227 353 (BSNL/MTNL Subscribers only)
-199 to 999 °F
Website : www.selec.com | Email : sales@selec.com
Doc. name : OP INST DTC231 OP496-V01(Page 2 of 2)