Omega Products DRG-SC-TC Installation Manual

SPECIFICATIONSSPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONSSPECIFICATIONS

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Sensor Types: J, K, T, R, S, E, B
Input Ranges: see table 6.
Impedance: >1MΩ
Bias Current (burnout detection):

<1.5microamp
Overvoltage: ±10V differential
Common Mode (Input to Ground):

1800VDC, max.

Zero and Span AdjustabilityZero and Span Adjustability

Zero and Span Adjustability

Zero and Span AdjustabilityZero and Span Adjustability

50% of any selected range

OutputOutput

Output

OutputOutput

Voltage Output

Output: 0-5V, 0-10V

Source Impedance: <10Ω

Drive: 10mA, max.
Current Output

Output: 0-1mA, 0-20mA,

4-20mA
Source Impedance: >100KΩ
Compliance:

0-1mA; 7.5V, max.(7.5KΩ)

0-20mA; 12V, max.(600Ω)

4-20mA; 12V, max.(600Ω)

AccuracyAccuracy

Accuracy (Including Linearity,

AccuracyAccuracy

Hysteresis) see Table 5

StabilityStability

Stability

StabilityStability

+0.04% of the maximum full scale

range per ºC change in ambient
temperature, maximum.

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http://www.omega.com

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Terminations and WireTerminations and Wire

Terminations and Wire

Response Time (10 to 90%)Response Time (10 to 90%)

Response Time (10 to 90%)

Response Time (10 to 90%)Response Time (10 to 90%)

500mSec., typical.

Common Mode RejectionCommon Mode Rejection

Common Mode Rejection

Common Mode RejectionCommon Mode Rejection

DC to 60Hz: 120dB

IsolationIsolation

Isolation

IsolationIsolation

1800VDC between input, output
and power.

EMC ComplianceEMC Compliance

EMC Compliance

EMC ComplianceEMC Compliance

Emissions: EN50081-1
Immunity: EN50082-2
Safety: EN50178

LED IndicationLED Indication

LED Indication

LED IndicationLED Indication

TROUBLE LED:

Yellow, off during

normal device operation.

INPUT LED:

Green, continuously on
if input is within selected range,
flashes otherwise

CAL OK LED:

Yellow, continuously

on in normal device operation

Thermocouple Burnout DetectThermocouple Burnout Detect

Thermocouple Burnout Detect

Thermocouple Burnout DetectThermocouple Burnout Detect

Field configurable upscale,
downscale, or disabled

Humidity (Non-Condensing)Humidity (Non-Condensing)

Humidity (Non-Condensing)

Humidity (Non-Condensing)Humidity (Non-Condensing)

Operating: 15 to 95% (@ 45°C)
Soak: 90% for 24 hours (@ 65°C)

Temperature RangeTemperature Range

Temperature Range

Temperature RangeTemperature Range

Operating: 0 to 55°C (32 to 131°F)
Storage: -25 to 70°C (-13 to 158°F)

PowerPower

Power

PowerPower

Consumption: 1.5W typical,

2.5W max.

Range: 9 to 30VDC

OMEGA ENGINEERING, INC. warrants this unit to be free of manufacturing defects for the life of the product.
If the unit should malfunction, it must be returned to the factory for evaluation. OMEGA's Customer Service Department will issue an Authorized Return
(AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective it will be repaired or replaced at
no charge. OMEGA's WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper
interfacing, operation outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having
been tampered with or shows evidence of being damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specifica­tion; misapplication; misuse or other operating conditions outside of OMEGA's control. Components which wear are not warranted, including but not
limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes responsibility for any omissions
or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA,
either verbal or written. OMEGA warrants only that the parts manufactured by it will be as specified and free of defects. OMEGA MAKES NO
OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL
IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANT ABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DIS­CLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive and the total liability of OMEGA with respect to
this order, whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of
the component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or special damages.

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CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a "Basic Component" under 10 CFR 21 (NRC), used in
or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any nuclear
installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic WAR­RANTY/DISCLAIMER language, and additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever
arising out of the use of the Product(s) in such a manner.

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY PRODUCT(S) TO OMEGA,
PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA'S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO
AVOID PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.

FOR WARRANTY RETURNS, please have the following information
available BEFORE contacting OMEGA:

1. P.O. number under which the product was PURCHASED,

2. Model and serial number of the product under warranty, and

3. Repair instructions and/or specific problems relative to the
product

OMEGA's policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest in
technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
 Copyright 1996 OMEGA ENGINEERING, INC. All rights reserved. This documentation may not be copied, photocopied, reproduced, translated,
or reduced to any electronic medium or machine-readable form, in whole or in part, without prior written consent of OMEGA ENGINEERING, INC.

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing certification of its products to the European New Approach
Directives. OMEGA will add the CE mark to every appropriate device upon certification.
The information contained in this document is believed to be correct but OMEGA Engineering, Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications
without notice.
WARNING: These product are not designed for use in, and should not be used for, patient connected applications.

RETURN REQUEST/ INQUIRIES

Terminations and WireTerminations and Wire

Screw terminals for 12-22 AWG.
Use twisted pair for output and
power connections.

Agency ApprovalsAgency Approvals

Agency Approvals

Agency ApprovalsAgency Approvals

CSA CSA

CSA certified per standard C22.2,

CSA CSA

No. 0-M91 and 142-M1987 (File No.
LR42272).

ULUL

UL recognized per stan-

ULUL

dard UL508 (File No.E99775).

Conformance per EMC directive
89/336/EEC and low voltage 73/
23/EEC.

MountingMounting

Mounting

MountingMounting

32mm or 35mm DIN rail

PIN CONNECTIONSPIN CONNECTIONS

PIN CONNECTIONS

PIN CONNECTIONSPIN CONNECTIONS

11 DC Power(+)
12 DC Power (-)
13 No Connection
41 T/C Input(+)
42 T/C Input (-)
43 No Connection
21 DC Power (+)
22 DC Power(-)
23 No Connection
51 Output (+)
52 Output (-)
53 No Connection

WARRANTY/DISCLAIMER

FOR NON-WARRANTY REPAIRS, consult OMEGA for current repair
charges. Have the following information available BEFORE contacting
OMEGA:

1. P.O. number to cover the COST of the repair,

2. Model and serial number of product, and

3. Repair instructions and/or specific problems relative to the
product.

CECE

CE

CECE

721-0616-00B 8/97

DRG-SC-TC
Thermocouple Input, Field Configurable Isolator

Instruction Sheet M2397/0796

DESCRIPTIONDESCRIPTION

DESCRIPTION

DESCRIPTIONDESCRIPTION

The DRG-SC-TC is a DIN rail mount,
thermocouple input signal conditioner
with 1800VDC isolation between in­put, output and power. The field
configurable input and output offer
flexible, wide ranging capability for
J, K, T, R, S, E and B type thermo­couples.

The input of the DRG-SC-TC can be
configured for over 60 different ther­mocouple temperature ranges (see
Table 6). The output is linear to
temperature and can be set for either
0-5V, 0-10V, 0-1mA, 0-20mA or
4-20mA.

Wide ranging, precision zero and
span pots allow 50% adjustablity of
offset and span turn-down within each
of the ranges. For example, the 0­1000°C range could be offset and
turned down to provide a 4-20mA
signal representing 500-1000°C.
Similarly, adjustment can be refer­enced to the output range. The
example from above could be used
to provide a 12-20mA signal from a
750 to 1000°C temperature input.

APPLICATIONAPPLICATION

APPLICATION

APPLICATIONAPPLICATION

The DRG-SC-TC field configurable
thermocouple input isolator is useful
in eliminating ground loops and inter­facing thermocouple sensors to data
acquisition and control systems.

Three way isolation completely elimi­nates ground loops from any source.
Isolation protects expensive SCADA
systems from ground faults and al­lows the noise reduction benefits of
grounded thermocouples to be real­ized.

The DRG-SC-TC employs the latest
in advanced analog signal process­ing technology. In addition to its

multiple microprocessors, a special
ASIC* chip is used for high accuracy
and reliability. The DRG-SC-TC is
also equipped with cold junction com­pensation (CJC) circuitry to provide
ice-point reference. Upscale or
downscale thermocouple burnout
detection is switch selectable.

High density DIN rail mounting offers
an extremely compact solution to
save valuable panel space.

DIAGNOSTIC LEDSDIAGNOSTIC LEDS

DIAGNOSTIC LEDS

DIAGNOSTIC LEDSDIAGNOSTIC LEDS

The DRG-SC-TC is equipped with
front panel LEDs for INPUT (green),
TROUBLE (yellow) and CAL OK (yel­low). At start-up, both the INPUT
and the CAL OK LEDs flash alter­nately for 10 seconds while start-up
takes place.

INPUT LEDINPUT LED

INPUT LED

INPUT LEDINPUT LED

This green LED is lit continuously
when the input is within the specified
range. In the full temperature range
setting, for the over range condition
the LED flashes at 8Hz, whereas for
the under range condition it flashes
at 4Hz. In a sub-range temperature
setting, for the over range condition
the LED flashes at 1Hz, whereas for
the under range condition it flashes
at 0.5Hz.

CAL OK LEDCAL OK LED

CAL OK LED

CAL OK LEDCAL OK LED

This yellow LED is continuously on
when the device is calibrated.

TROUBLE LEDTROUBLE LED

TROUBLE LED

TROUBLE LEDTROUBLE LED

This yellow LED is off during the
normal operation of the device. Con­sult factory if this LED is on, indicat­ing a microprocessor malfunction.

* Application Specific Integrated Circuit

CONFIGURATIONCONFIGURATION

CONFIGURATION

CONFIGURATIONCONFIGURATION

An advantage of the DRG-SC-TC is
its wide ranging capabilities and ease
of configuration. The DRG-SC-TC
enables 50% input zero and span
adjustablity DRG-SC-TC within each
of the full-scale input ranges.

Unless otherwise specified, the
factory presets the Model
DRG-SC-TC as follows:

Input: J-type
Range: 0 to 500°C
Output: 4 to 20mA
Burn Out: Upscale

The DC power input accepts any DC
source between 9 and 30V; typically
a 12V or 24VDC source is used (see
Accessories).

For other I/O ranges refer to Tables
1 through 6 and reconfigure switches
SW1 and SW2 for the desired input
type range and output.

WARNING:WARNING:

WARNING:

WARNING:WARNING:

Do not attempt to change
any switch settings with power applied.
Severe damage will result!

1. Choose the desired temperature
range from table 6, then use table 1
and 2 to configure the switches, as
described in the following steps, for
thermocouple type and range.

2. With DC power off, position input
switches 1 and 2 on "SW2" for the
desired burnout detection mode.

3. Set positions 4 through 10 on
"SW2" for the desired thermocouple
range and type.

4. Set positions 1 through 8 of output
range switch "SW1" for the desired
output signal. (Table 4)

CALIBRATIONCALIBRATION

CALIBRATION

CALIBRATIONCALIBRATION

1. After configuring the dip switches,
connect the input to a calibrated ther­mocouple source. Connect the out­put to the actual device load (or a
load approximately equivalent to the
actual device load value) and apply
power.

NOTE: To maximize thermal stability,
final calibration should be performed in
the operation installation, allowing
approximately 1 to 2 hours for warm up
and thermal equilibrium of the system.

2. Set the calibrator to the desired
minimum input and adjust the zero
potentiometer for the desired mini­mum output.

3. Set the calibrator to the desired
maximum input and adjust the span
potentiometer for the desired maxi­mum output.

4. Repeat steps 2 and 3, if necessary
for best accuracy.

TABLE 1:

Thermocouple type
switch settings (SW2, positions 8,
9, 10)

TABLE 2

Range switch settings used in
conjunction with Table 6 (SW2,
positions 4, 5, 6, and 7)

TABLE 3

: :

: Thermocouple burnout

: :

detection switch settings
(SW2, position 1, 2)

Note: SW2 position 3 is not used.

TABLE 4
Output switch settings (SW1,
position 1-8)

TABLE 5:

Accuracy

Table 6: Thermocouple Range Settings

Figure 1: DRG-SC-TC Factory Calibration: J-Type, 0-500°C, 4-20mA, Upscale

Note1: All modules are designed and tested to operate in ambient
temperatures from 0 to 55°C, when mounted on a horizontal DIN rail.
When five or more modules are mounted on a vertical rail, circulating air
or model DRG-HS01 Heat Sink is recommended.

Figure 2: Mechanical dimensions for DRG-SC-TC

Figure 3: Wiring Diagram for DRG-SC-TC