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DRSP-I
LifetimeTM
DRSP-I-DC
4-20 mA Isolated Signal Splitters
M-5244/0818
Model Module Power
DRSP-I
DRSP-I-DC
Description
The DRSP-I series accepts a 4-20 mA current input and provides two optically isolated 4-20 mA current outputs that are
linearly related to the input. Typical applications include isolation, output splitting, output device separation, and redundancy
(i.e. to prevent failure of the entire loop if one device fails), or a
combination of these.
Full 4-way isolation makes this module useful for ground loop
elimination, common mode signal rejection, or noise pickup
reduction.
Sink/Source I/O
Standard is a 15 VDC loop excitation supply for the input and
a 20 VDC loop excitation supply for each output. These power
supplies can be selectively wired for sinking or sourcing allowing
use with any combination of powered or unpowered milliamp
I/O devices.
I/O Status LEDs
A green input LED and two red output LEDs vary in intensity with
changes in the process input and output signals. These provide a
quick visual picture of your process loop at all times.
Output Test
An output test button provides a fixed output (independent of the
input) when held depressed. The test output level is potentiometer adjustable from 0 to 100% of output span.
Terminals are provided to operate the test functions remotely for
each channel. This also allows use as a remote manual override
to provide a temporary fixed output.
85-265 VAC, 50/60 Hz or 60-300 VDC
9-30 VDC or 10-32 VAC
User’s Guide
Shop online at
omega.com
e-mail: [email protected]
For latest product manuals:
www.omegamanual.info
DC Input Range
Factory ranged, please specify
Voltage: 0-10 mVDC to 0-100 VDC
Bipolar voltage: ±50 mVDC to ±10 VDC
Current: 0-1 mADC to 0-50 mADC, 4-20 mADC
Input Impedance and Burden
Voltage: 200 kΩ minimum
Current: 50 Ω typical
Voltage burden: 1.25 VDC max. at 20 mA current input
Input Loop Power Supply
15 VDC ±10%, regulated, 25 mADC
May be selectively wired for sinking or sourcing mA input
LoopTracker
Variable brightness LEDs indicate I/O loop level and status
One for input, one for each output
Channel 1 and Channel 2 DC Output Ranges
Factory configured, please specify for each output channel
Voltage: 0-1 VDC to 0-10 VDC, 10 mA max
up to 20 VDC with M19, M29, M39
Bipolar voltage: ±1 VDC to ±10 VDC
Current: 0-1 mADC to 0-20 mADC, 4-20 mADC
20 V compliance, 1000 Ω at 20 mA
Output Calibration
Multi-turn zero and span potentiometers for each output channel
±15% of span adjustment range typical
Output Loop Power Supplies
20 VDC nominal, regulated, 25 mADC for each output channel
May be selectively wired for sinking or sourcing mA output
Output Test/Override
Front momentary buttons or external contact closures for each
channel to set output test levels.
Each output test level potentiometer adjustable 0-100% of span
Output Ripple and Noise
Less than 10 mVRMS
Linearity
Better than ±0.1% of span
Ambient Temperature Range and Stability
–10°C to +60°C operating ambient
Better than ±0.04% of span per °C stability
Response Time
70 milliseconds typical
Fast response time option DF, 10 milliseconds typical
Isolation
Full 4-way, 1200 VRMS minimum
MADE IN
Housing and Connectors
IP 40, requires installation in panel or enclosure
For use in Pollution Degree 2 Environment
Mount vertically to a 35 mm DIN rail
Eight 4-terminal removable connectors, 14 AWG max wire size
Power
85-265 VAC, 50/60 Hz or 60-300 VDC, 6 W maximum
D versions: 9-30 VDC or 10-32 VAC 50/60 Hz, 6 W maximum
WARNING: This product can expose you to chemicals including nickel, which are known to the State of California to cause
cancer or birth defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov
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DRSP-I, DRSP-I-DC 4-20 mA Isolated Signal Splitters
Electrical Connections
WARNING! All wiring must be performed by a qualified electrician or instrumentation engineer. See wiring diagrams.
Avoid shock hazards! Turn signal input, output, and power off
before connecting or disconnecting wiring.
The DRSP-I is factory configured for one 4-20 mA input and two
4-20 mA outputs as indicated on the serial number label.
To maintain full isolation, avoid combining power supplies in
common with inputs, outputs, or unit power.
The power supplies are fuse protected and the unit may be
returned for fuse replacement.
Signal Input Terminals
Polarity must be observed when connecting the signal inputs.
The DRSP-I may be wired for a sinking or sourcing input.
Determine if your input device provides power to the current loop
or if the loop must be powered by the DRSP-I. Typical voltage
may be 9-24 VDC at your device’s terminals if it provides power
to the loop.
Type of Input Device – Terminal + Terminal
Transmitter with a mA (current)
output that provides power to the
current loop.
17 (–) 19 (+)
Typically a 3 or 4-wire device.
Transmitter with mA (current) output
that is unpowered.
Typically a 2-wire device.
19 (–) 18 (+15 V)
DRSP-I module provides loop power.
Signal Output Terminals
Polarity must be observed when connecting the signal outputs.
The two DRSP-I output channels may be individually wired for a
sinking or sourcing output as needed.
For each channel determine if your output device provides power
to the current loop or if the loop must be powered by the DRSP-I.
Typical voltage may be 9-24 VDC at your device’s terminals if it
provides power to the loop.
The wiring diagram illustrates typical wiring examples. Each
channel may be wired as needed.
If the output does not function, check wiring and polarity for both
inputs and outputs.
Type of Device for Output
Channel 1
– Terminal + Terminal
Measuring/recording device accepts
a mA (current) input and the input is
unpowered or passive. DRSP-I pro-
3 (–) 4 (+20 V)
vides the loop power.
Measuring or recording device
accepts a mA (current) input and
2 (–) 3 (+)
provides power to the current loop.
Type of Device for Output
Channel 2
– Terminal + Terminal
Measuring/recording device
accepts a mA (current) input and
the input is unpowered or passive.
7 (–) 8 (+20 V)
DRSP-I provides the loop power.
Measuring or recording device
accepts a mA (current) input and
6 (–) 7 (+)
provides power to the current loop.
Module Power Terminals
Check white model/serial number label for module operating
voltage to make sure it matches available power.
Connect power last. When using DC power, either polarity is
acceptable, but for consistency with similar products, positive
(+) can be wired to terminal 13 and negative (–) can be wired
to terminal 16.
Current Sinking Outputs
Typical of some PLCs that have current sourcing inputs.
Current Sinking Outputs with Separate Power Supplies
Typical of a system using loop powered displays with external
loop supplies.
Current Sourcing Outputs
DRSP-I provides power to each loop. Typical of a system or
PLC using current sinking inputs.
External Contacts For Test Function
Closing the contact provides the same function as pressing
the Test button for each channel. May be used as a manual
override.
Output LEDs: Variable brightness red LED indicates output level
for each channel
Test Cal.: Output test level adjustment
Test: Push to test output. Sets each output to level determined
by Test Cal. potentiometer.
Span: Output span calibration for each channel
Input LED: Variable brightness green LED indicates input level
Zero: Output zero calibration for each channel
Current Sourcing Input
DRSP-I provides power to input loop. Typical when using a
passive or unpowered transmitter or sensor.
Current Sinking Input
Typical of a system using a transmitter that is externally powered and provides power to the loop.
Current Sinking Input with Separate Power Supply
Typical of a system using a passive transmitter that uses a loop
power supply to power to the loop.
Module Power
DRSP-I: 685-265 VAC, 50/60 Hz or 60-300 VDC
DRSP-I-DC: 9-30 VDC or 10-32 VAC 50/60 Hz
Power wiring: Cu 60/75°C conductors 14 AWG max.
Power
Source
mA
Device 1
Ri
21 3 4 65 7 8
Output Ch. 1 Output Ch. 2
Passive
mA
Device 1
Ri
+ –
Loop
Power
Source 1
– +
21 3 4 65 7 8
Output Ch. 1 Output Ch. 2
Passive
mA
Device 1
– + 20V – + 20V
Output Ch. 1 Output Ch. 2
Channel 1 Channel 2
Output
Test Cal.
Test
Span
Zero
LED LED
OMEGA Engineering , Inc.
Input
LED
DRSP-I
DC to DC Isolated Signal Splitter
Transmitter
1817 19 20
+15V –
Ri
Passive
mA
Xmtr
1817 19 20
+
–
Ri
mA Xmtr
Power
Source
1817 19 20
+
–
+ –
Ri
Passive
mA Xmtr
Power
Source
mA
Device 2
– +– +
Passive
mA
Device 2
+ –
Loop
Power
Source 2
– +
Ri
65 7 821 3 4
1413 15 16109 11 12
Test Cal.
Test
Span
Zero
2221 23 24
To maintain
full isolation,
avoid combining
power supplies
in common with
inputs, outputs,
or unit power.
Loop
Power
Source 3
Do not connect to
unused terminals
3029 31 322625 27 28
28 Power AC or DC –
26 Earth Ground
25 Power AC or DC +
Ri
Ri
Passive
mA
Device 2
Output
Ri
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DRSP-I, DRSP-I-DC 4-20 mA Isolated Signal Splitters
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Mounting to a DIN Rail
Install module vertically on a 35 mm DIN rail in a protective
enclosure away from heat sources.
Do not block air flow. Allow 1" (25 mm) above and below housing vents for air circulation.
Avoid shock hazards! Turn signal input, output, and power off
before installing or removing module.
1. Tilt front of module downward and position the lower mounts
and spring clips against the bottom edge of DIN rail.
2. Push front of module upward until upper mount snaps into
place.
Removal
1. Push up on bottom back of module.
2. Tilt front of module downward to release upper mount from
top edge of DIN rail.
3. The module can now be removed from the DIN rail.
Upper Mount
Lower Mounts
Spring Clips
Calibration
Front-mounted Zero and Span potentiometers for each channel
can be used to compensate for load and lead variations.
1. Apply power to the module and allow a minimum 30 minute
warm up time.
2. Using an accurate calibration source, provide an input to the
module equal to the minimum input required for the application.
3. Using an accurate measurement device for the output,
adjust the Zero potentiometer for the exact minimum output
desired. The Zero control should only be adjusted when the
input signal is at its minimum. This will produce the corresponding minimum output signal. The Zero control will
provide adjustment for the 4 mA or low end of the signal.
4. Set the input at maximum, and then adjust the Span pot for
the exact maximum output desired. The Span control should
only be adjusted when the input signal is at its maximum.
This will produce the corresponding maximum output signal.
The Span control will provide adjustment for the 20 mA or
high end of the signal.
5. Repeat adjustments for maximum accuracy.
6. Repeat adjustments for second channel.
Output Test Function
When the Test button is depressed it will drive the output with a
known good signal that can be used as a diagnostic aid during
initial start-up or troubleshooting. When released, the output will
return to normal.
The Test Cal. potentiometer is factory set to approximately 50%
output. It can be adjusted to set the test output from 0 to 100%
of the output span.
Press and hold the Test button and adjust the Test Cal. potentiometer for the desired output level.
The output test function for each channel may be externally
wired for remote test operation or a manual override. See wiring diagram.
Operation
The DRSP-I accepts a 4-20 mA current input and provides two
optically isolated 4-20 mA current outputs that are linearly
related to the input.
The green input LED provides a visual indication that a signal
is being sensed by the input circuitry of the module. It also
indicates the input signal strength by changing in intensity as
the process changes from minimum to maximum.
If the LED fails to illuminate, or fails to change in intensity as
the process changes, check the module power or signal input
wiring.
The two red output LEDs provide a visual indication that the
output signals are functioning. They become brighter as the
input and each corresponding output change from minimum
to maximum.
The red LED will only light if the output loop current path is
complete. Failure to illuminate or a failure to change in intensity
as the process changes may indicate a problem with the module
power or signal output wiring.
Note that it may be difficult to see the LEDs under bright lighting
conditions and low I/O levels.
Output 1 Output 2
1 2 3 4
Output Test 1 Output Test 2
9 10 11 12
13 14 15 16
17 18 19 20
Input
Power
not used
25 26 27 28
Wire terminal
torque
0.5 to 0.6 Nm or
4.4 to 5.3 in-lbs
5 6 7 8
not used
Do not connect to
unused terminals
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WARRANTY/DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month
grace period to the normal one (1) year product warranty to cover handling and shipping time. This
ensures that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, 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 having been 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 in which wear is not warranted, include but are 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 the
company 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 MERCHANTABILITY
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.
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.
RETURN REQUESTS/INQUIRIES
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. Purchase Order 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 2017 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.
FOR NON-WARRANTY REPAIRS,
OMEGA for current repair charges. Have
the following information available BEFORE
contacting OMEGA:
1. Purchase Order number to cover the COST
of the repair,
2. Model and serial number of the product, and
3. Repair instructions and/or specific problems
relative to the product.
consult
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