Omega Products DRG-SC-AC Installation Manual

SPECIFICATIONS

Inputs

Voltage Input

Ranges: 100mV to 200VAC
Impedance: >100KΩ
Overvoltage: 300VAC

Current Input

Ranges:10mA to 100mAAC
Impedance: 20Ω, typical
Overcurrent: 200mAAC
Overvoltage: 60V peak

Frequency Range: 40 to 400Hz,

factory calibrated at 60Hz

Common Mode(Input to Ground):

1800VDC, max.

Zero and Span Range:

Zero Turn-Up: 50% of full
scale range
Span Turn-Down: 50% of full
scale range

Output

Voltage Output

Output: 0-5V, 0-10V
Source Impedance: <10Ω
Drive: 10mA, max.

(1KΩ, min. @ 10V)

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Current Output

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

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

0-1mA; 7.5V, max. (7.5KΩ, max.)

0-20mA; 12V, max. (600Ω, max.)

4-20mA; 12V, max. (600Ω, max.)

LED Indicator (green)

8Hz flash when input is 10%
above full scale range (FSR)

Accuracy (Including Linearity, Hyster­esis)

+0.1% of span, typical
+0.5% of span, maximum

Stability

+0.025%/°C of selected input
span, typical.

Response Time (10 to 90%)

250mSec., typical.

Common Mode Rejection

DC to 60Hz: 120dB

Isolation

1800VDC between input, output
and power.

EMC Compliance (CE Mark)

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

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.

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used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic W ARRANTY/DISCLAIMER language, and additionally, purchaser will
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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.

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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.

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)

Storage: -25 to 70°C

(-13 to 158°F)

Power

Consumption: 1.5W typical,

2.5W max.

Range: 9 to 30VDC

Wire Terminations

Screw terminals for 12-22 AWG

Agency Approvals

CSA certified per standard C22.2,

No. 0-M91 and 142-M1987 (File No.
LR42272). UL recognized per stan­dard UL508 (File No.E99775).CE

Compliance per EMC directive 89/

336/EEC and Low Voltage 73/23/EE.

Mounting

32mm and 35mm DIN Rail

PIN CONNECTIONS

11 DC Power (+)
12 DC Power (-)
21 DC Power (+)
22 DC Power (-)
41 AC Signal Input (Hot)
42 AC Signal Input (Neu)
51 Output (+)
52 Output (-)

WARRANTY/DISCLAIMER

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.

721-0610-00B 11/96

DRG-SC-AC
AC Input, Field Configurable Isolator

Instruction Sheet M2389/0796

DESCRIPTION

The field configurable DRG-SC-AC is
a DIN rail mount, AC input signal
conditioner with 1800VDC isolation
between input, output and power. The
field configurable input and output
offers flexible, wide ranging capability
for scaling, converting or buffering
AC inputs ranging from 5mA to
100mAAC or 50mV to 200VAC. The
DC output of the DRG-SC-AC is pro­portional to the average of the of the
fully-rectified AC input signal, and is
calibrated for sine waves between 40­400Hz.

For current inputs above 100mAAC, it
is recommended that an input shunt
resistor be used and the DRG-SC-AC
be configured for the proper input
range. For example, a 5AAC current
transformer output can use a 0.1Ω,
5W shunt resistor and set the input of
the DRG-SC-AC for 0-500mVAC.

APPLICATION

The DRG-SC-AC is useful in applica­tions requiring an isolated, conditioned
DC output from an AC signal. Typical
applications include energy manage­ment, load shedding, motor current/
load monitoring, locked rotor detec­tion, isolation and data acquisition.
The output of the DRG-SC-AC can
drive a digital meter for direct display
or can interface with alarming or con­trol devices including PLCs and com­puters.

DIAGNOSTIC LED

The DRG-SC-AC 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 quickly 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-AC is its wide ranging capa­bilities and ease of configuration. The
DRG-SC-AC has 15 input range switch
settings.

Trim potentiometers allow 50% input
zero and span adjustablity within each
of the 15 full-scale input ranges.

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

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.

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

Input Range: 0-500mVAC
Output: 4-20mA

WARNING:

change any switch settings with power
applied. Severe damage will result!

Do not attempt to

The DC power input accepts any DC
source between 9 and 30V, typically a
12V or 24VDC source is used

Refer to Tables 1 through 3 for the
proper switch settings. With power
disconnected, use the switches on
SW1 to select the input type (voltage or
current), on SW2 to select the HI or LO
input ranges, and on SW4 to select the
desired input range. Using the
switches on SW3, select the desired
type of output.

CALIBRATION

1. After configuring the DIP
switches, connect the input to a cali­brated AC source. Connect the
output of the actual device load (or a
load approximately equivalent to the
actual device load value) and apply
power. Refer to the Terminal Wiring
Diagram. (Figure 3)

NOTE: to maximize thermal stability, fi­nal calibration should be performed in the
operating installation, alllowing 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 minimum
output.

Figure 1: DRG-SC-AC Input Range Selector-Switch Settings

TYPICAL APPLICATION

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.

Figure 2: DRG-SC-AC Output Range Selector-Switch Settings

Figure 3: DRG-SC-AC Input Jumper Settings

Figure 2: Load monitoring using a current

transformer and the DRG-SC-AC

Figure 1: DRG-SC-AC Factory Calibration:

0-500mVAC, 4-20mA

Warning: Do not attempt to
change any switch settings
with power applied. Severe
damage may occur!

Figure 3: Wiring Diagram for DRG-SC-AC

Figure 5: Mechanical Dimensions for DRG-SC-AC