Specifications
Specification
Value
Power Supply
24V DC Nominal ± 5%
Output Signal
Current Output Models: 4-20 mA
Voltage Output Models: 0-5V DC or 0-10V DC
Output Limit
Current Output Models: 25 mA
Voltage Output Models: 9V for 5V Output, 18V for 10V
Output
Response Time
EPRM: < 500 ms
EPRMR: < 1,000 ms
Accuracy
1.0% FS
Loading
Voltage Output Models: 10 Kilohm Min. Recommended
Isolation Voltage
5 kV
Frequency Range
Average Responding Models (Non-RMS): 20-6,000 Hz
(Sinusoidal)
True-RMS Models (EPRMR): 20-6,000 Hz (All Wave Forms)
Sensing Aperture
0.74 in. (19mm) dia.
Housing
UL94 V0 Flammability Rated Thermoplastic
Environmental
Operating Temperature: -4 to +122° F (-20 to +50° C)
Humidity: 0-95% RH, Non-Condensing
Approvals
UL 508 Industrial Control Equipment (Pending USA)
CE Certified
Output Wiring
Connect control or monitoring wires to the sensor using the sup-
plied female termination.
Model
Wiring Diagram
Current Output
(4-20 mA) Models
Voltage Output
(0-5/0-10V DC)
Models
Power
Supply
Load
(-)
(+)
OUT
+24V
Current Output
Loop-Powered
Power
Supply
Load
(-)
(+)
GND
OUT
+24V
Auxillary Powered
Load
Installation
Considerations for all EPRM Series sensors…
•
Place the wire in which current is to be monitored through the
cable guide and aperture of the sensor.
•
Insert a flat blade screwdriver into the gap next to the split core
sensor head, and gently turn the screwdriver to release the latch
•
Repeat for the opposite side of the sensor head, and the top will
come straight off the sensor body.
•
To clamp the sensor head, place it on the axis and press down
firmly until the latches clip in place.
•
Mount the EPRM unit directly onto a standard DIN rail.
Note:
N
This sensor is not directionally sensitive and can be mounted in any
position or hung directly on wiring with use of wire ties
Setpoint Adjustment
The CurrentWatch™ EPRM Series sensors feature field selectable
ranges. The ranges are factory calibrated, eliminating time consum-
ing and inaccurate field setting of zero or span.
Stltcoing Rangt
1. Determine the normal operating amperage of your monitored
circuit
2. Select the current range that is equal to or slightly higher than
the normal operating amperage
3. Place the Range Switch in the appropriate position
Troubleshooting
Problem
Solution for Current
Output (4-20 mA) Models
Solution for Voltage
Output (0-5/0-10V DC)
Models
Sensor has no
output
Power supply is not properly sized. Check power supply voltage
and current rating.
Monitored load is not AC or is not on. Check that the monitored
load is AC and that it is actually on.
Polarity is not properly matched. Check and correct wiring
polarity.
Output signal is
too low
The jumper may be set in a range that is too high for current
being monitored. Move jumper to the correct range.
The load current is not sinu-
soidal (EPRM Series only).
Select an EPRMR Series (True
RMS) sensor that works on
distorted waveforms.
Output load may be too low.
Check output load, making
sure it is at least 10 kilohm.
For loop-powered models, monitored current is below minimum
required. Loop the monitored wire several times through the
aperture until the “sensed” current rises above minimum.
(‘Sensed Amps’ is equal to ‘Actual Amps’ multiplied by the
‘Number of Loops.’)
Output signal is
always at maxi-
mum
The jumper may be set in a range that is too low for current
being sensed. Change the jumper position.
Output signal is
always at 4 mA
Monitored load is not AC or is
not on. Check that the moni-
tored load is AC and that it is
actually on.
—
EaoNn CNrpNraoiNn
Electrical Sector
1111 Superior Ave.
Cleveland, OH 44114
United States
877-ETN-CARE (877-386-2273)
Eaton.com
© 2014 Eaton Corporation
All Rights Reserved
Publication No. P51928 / 004
March 2014
Eaton is a registered trademark of Eaton
Corporation.
All other trademarks are property of their
respective owners.
Instructions Publication
P51928
Effective March 2014
CurrentWatch™ EPRM Series Current
Sensors Powered AC Current Sensors,
Up to 400A Input Range, Analog Outputs
