FUTEK CSG110 (JM-2A / JM-2AD)-Series - Manual (Page 21)

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To prevent damage, make sure all connections to the
CSG110 are completed before turning on the power to
the CSG110.
It is best to troubleshoot the CSG110 and the sensor
when both are completely removed from the application
and fixtures. Utilizing a voltmeter instead of an instrument
or PLC will help narrow down the challenge.
If another CSG110 or sensor is available, a swap may help
confirm where the challenge arises.
The CSG110 outputs a consistent high voltage
or current.
1. A high non-changing voltage (or current) output from
the CSG110 usually indicates an open on the sensor
side. Confirm the wiring in the sensor DB9. Also, a
resistance check can be done on the sensor connec-
tions (±Excitation and ±Signal) to confirm there is no
open or short in the sensor. The sensor spec sheet
or calibration certificate will list the sensor’s bridge
resistance.
2. Shorting the ±Signal connections on the CSG110
Sensor Side (pins 2 and 3) with the sensor discon-
nected should result in 0 VDC output from the
CSG110. This can be useful to confirm if the CSG110
is responding to a change in the load.
3. Confirm that the gain level is set appropriately. A
high gain may drive the output of the CSG110 to full
output.
4. Confirm the sensor has not been overloaded and
now has a constant high output. If possible, remove
the ±Signal wires from the sensor and confirm the
zero output, with a voltmeter, while utilizing the pow-
er from the CSG110 to the ±Excitation wires.
Troubleshooting Tips