External Power, I/O, And Modbus Subsystems - ADS TRITON+ Installation, Operation And Maintenance Manual

External Power, I/O, and Modbus Subsystems

The following tables contain general troubleshooting techniques for
the external power, I/O, and Modbus subsystems corresponding to
externally-powered TRITON+ monitors, external input/output units
(XIOs), and external Modbus interface units (XBUSs).
Problem
Possible
Causes
Possible
Solutions
Maintenance and Troubleshooting
Monitor is not receiving power from the external source.
Breaker may have tripped.
Station power may be off.
Wiring may not be properly connected.
Power supply may be faulty.
ExPAC may be faulty.
Communication cable running between the ExPAC,
XBUS, or XIO is disconnected or defective.
Reset breaker.
Have owner/operator restore main power source to
station, as applicable.
Verify that the wiring is properly connected inside the
XIO/XBUS or to the ExPAC and power supply.
Verify that "On" LED on the front of the power supply in
the XIO/XBUS is illuminated. If it is not, but AC power is
live, replace the power supply/XBUS/XIO.
Verify that the DC OUT LED (to the right of the DC OUT
terminal connector) on the ExPAC is illuminated. If it is
not, but the DC INPUT LED (to the right of the DC
INPUT terminal connector) is illuminated, test the power
at the DC OUT (P4 pins 1 & 2). If power is not available,
replace the ExPAC/XBUS/XIO.
Inspect the communication cable for proper connection
at the monitor and the ExPAC/XBUS/XIO.
Replace communication cable between monitor and
ExPAC/XBUS/XIO.
Contact your regional ADS representative.
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