Omega Products DRG-SC-BG Installation Manual

SPECIFICATIONS

Input

Voltage Input
Full Scale Range: 10mV to
±200mV (Table 1).
Impedance: >1MΩ
Overvoltage: 400Vrms, max.

(intermittent); 264Vrms, max.

(continuous).
Common Mode (Input to Ground):
1800VDC, max.
Zero Turn-Up: 50% of full scale

range

Span Turn-Down: 50% of full

scale range

Operation: direct or reverse

acting

Output

Voltage Output

Output: 0-5V, 0-10V

Impedance: <10Ω

Drive: 10mA, max.

(1KΩ, min. @ 10V)

Current Output

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

4-20mA
Impedance: >100KΩ
Compliance:

0-1mA; 7.5V, max.(7.5KΩ, max.)

0-20mA; 12V, max. (600Ω, max.)

4-20mA; 12V, max. (600Ω max.)

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Bridge Excitation

1 to 10VDC, 120mA max.
Accuracy (Including Linearity, Hyster­esis)

±0.1% typical, ±0.2% maximum
of selected range at 25°C.

Stability

±0.025%/°C typical, 0.05%/°C

maximum, of selected full scale

range.

Output Noise (maximum)

0.1% of span, rms, or 10mV

whichever is greater.

Response Time (10 to 90%)

<200mSec., typical.

Common Mode Rejection

DC to 60Hz:³120dB

³100dB (0 -1mA, range)

Isolation

1800VDC between input, output

and power.

EMC Compliance

Emmissions: EN50081-1

Immunity: EN50082-2

Safety:EN50178

LED Indication (green)

Input Range (approx.)

>110% input: 8Hz flash

<0% input: 4Hz flash

Humidity ( Non-Condensing)

Operating: 15 to 95% (@ 45°C)

Soak: 90% for 24 hours (@ 65°C)

Temperature Range

Operating: 0 to 55°C (32 to

131°F)

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
REPRESENTA TIONS OF ANY KIND WHA TSOEVER, EXPRESSED OR IMPLIED, EXCEPT THA T OF TITLE, AND ALL IMPLIED W ARRANTIES INCLUD­ING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A P AR TICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITA TION 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.
ã 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.

Storage: -25 to 70°C

(-13 to 158°F)

Power

Consumption: 1.5W typical, 2.5W

max. (one 350Ω bridge), 4W max.
(four 350Ω bridges).

Range: 18 to 30VDC

Wire Terminations

Screw terminals for 12-22 AWG

Mounting:

32mm or 35mm DIN Rail

Agency Approvals

CSA certified per standard C22.2,

DRG-SC-BG
Bridge Input, Field Configurable Signal Conditioner

Instruction Sheet M2390/0796

No. 0-M91 and 142-M1987 (File No.
LR42272) UL recognized per standard
UL508 (File No.E99775). CE Con
formance per EMC directive 89/336/
EEC and low voltage 73/23/EEC.

PIN CONNECTIONS

11 DC Power (+)
12 DC Power (-)
13 No Internal Connection
21 DC Power (+)
22 DC Power (-)
23 No Internal Connection
41 Bridge Input (+)
42 Bridge Input (-)
43 Excitation (+)
51 Output (+)
52 Output (-)
53 Excitation (-)

1

DESCRIPTION

The DRG-SC-BG is a DIN rail mount,
bridge or strain-gage input signal
conditioner with 1800VDC isolation
between input, output and power. The
field configurable input and output
offers flexible, wide ranging capabil­ity for bridge or strain-gage input
applications from 0.5mV/V to over
50mV/V.

Wide ranging, precision zero and
span pots allow 50% adjustablity of
offset and gain within each of the 11
switch selectable input ranges. The
output can be set for either 0-5V,
0-10V, 0-1mA, 0-20mA or 4-20mA.

This flexibility, combined with an ad­justable (1 to 10VDC) bridge excita­tion source, provides the user a reli-

WARRANTY/DISCLAIMER

able, accurate instrument to isolate
and condition virtually any bridge or
strain-gage input.

APPLICATION

The DRG-SC-BG field configurable,
bridge input signal conditioner is use­ful in isolating ground loops and inter­facing bridge sensors to data acqui­sition and control systems.

Three way isolation completely elimi­nates ground loops from any source.
Isolation protects expensive SCADA

RETURN REQUEST/ INQUIRIES

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.

721-0611-00A 8/96

systems from ground faults and pro­vides filtering for noise reduction
which can be a significant problem
with small, millivolt, bridge signals.

Wide ranging flexibility allows the
user to easily zero out dead-loads in
weighing systems or configure bipo­lar input ranges for expansion-com­pression or vacuum-pressure bridge
applications.

High density DIN rail mounting offers
an extremely compact solution for
saving valuable panel space.

DIAGNOSTIC LEDS

The DRG-SC-BG is equipped with a
dual function LED signal monitor. The
green, front mounted LED indicates
both DC power and input signal sta­tus. Active DC power is indicated by
an illuminated LED. If the input signal
is more than 110% of the full-scale
range, the LED will flash at 8Hz. If this
continues to occur, you may wish to
change your full-scale input range
setting.

CONFIGURATION

A major advantage of the
DRG-SC-BG is its wide ranging capa­bilities and ease of configuration. The
DRG-SC-BG has 11 input range switch
settings.Trim potentiometers allow 50%
input zero and span adjustablity within
each of the 11 full-scale, input ranges.

For example, the 200mV switch set­ting in Table 1 configures the input for
a 0 to 200mV range. Since the span
can be contracted by 50%, this en­ables an input span as narrow as
100mV of the range, or 50%. This
span can be positioned anywhere
within the 0-200mV range with a zero
off-set as large as 50% of the full scale
range (e.g. 100 to 200mV input).

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

Input Setting: 0 to 50mV
Input Range: 0 to 30mV (3mV/V)
Excitation: 10V
Operation: Direct
Output: 4 to 20mA

The DC power input accepts any DC
source between 18 and 30V, typically
a 24VDC source is used .

For other I/O ranges refer to Tables 1
through 4 and reconfigure switches

SW1 and SW2 for the desired input
range, function, excitation and output
range.

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

CALIBRATION

1. After configuring the DIP switches,
connect the input to a calibrated milli­volt source. Connect the output to the
actual device load (or a load equivalent
to the actual device load value) and
apply power. (see Wiring Diagram,
Figure 2 or 3).

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

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

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

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

)

Table 1: Input Range
Selector-Switch Settings

Table 2: Direct or Reverse
Operation Setting

Table 3: Bridge Excitation
Selector-Switch Settings

Table 4: Output Range Selector-Switch Settings

Figure 2: Wiring Diagram for DRG-SC-BG

Figure 1: DRG-SC-BG Factory Calibration; 0 to 30mV (0 -50mV

switch settings) 10V excitation, direct operation, 4-20mA output

Note1: All DRG Series modues 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. Please refer to DRG-HS01 Technical Bulletin or contact factory for assistance.

Excitation (+

Bridge (+)

Excitation (-)

Bridge (-)

Figure 4: Mechanical Dimensions for DRG-SC-BGFigure 3: Bridge Reference Designations