Troubleshooting Tools
22 Product Manual
2.10 Remote I/O DSQC 350, Allen Bradley
Designation Colour Description/Remedy
POWER-24 VDC Green Indicates that a supply voltage is
present, and has a level above 12 VDC.
If no light, check that voltage is present on
power unit. That power is present in power
connector. If not, check cables and connectors.
If power is applied to unit but unit does not
work, replace unit.
NS/MS Green/red See section 2.14.
CAN Tx/CAN Rx Yellow See section 2.14.
NAC STATUS Green Steady green indicates RIO link in
operation.
If no light, check network, cables and
connections.
Check that PLC is operational.
Flashing green, communication
established, but INIT_COMPLETE bit
not set in NA chip, or configuration or
rack size etc. not matching configuration
set in PLC.
If LED keeps flashing continuously, check
setup
Bus status LED’s
DSQC 350
ABB Flexible Atomation
POWER
NAC STATUS
CAN Tx
CAN Rx
NS
MS
X8
X9
X5
X3
CAN Rx
NAC STATUS
CAN Tx
MS
NS
POWER
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