Product manual

Troubleshooting Tools
Product Manual 21
2.9 Analog I/O, DSQC 355
Designation Colour Description/Remedy
NS/MS Green/red See section 2.14.
RS232 Rx Green Indicates the state of the RS232 Rx line.
LED is active when receiving data.
If no light, check communication line and con-
nections.
RS232 Tx Green Indicates the state of the RS232 Tx line.
LED is active when tranceiving data.
If no light when transmission is expected, check
error messages and check also system boards in
rack.
+5VDC / +12VDC /
-12VDC Green Indicates that supply voltage is present and at
correct level.
Check that voltage is present on power unit.
Check 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 the unit.
DSQC 355
ABB flexible Automation
N.U
MS
RS232 Rx
+5V
Bus status LED’s
CAN Rx
+12V
RS232 Tx
N.U
CAN Tx
-12V
NS
Bus staus LED’s
Analog I/O
X8
S3
S2
X3
X5
X2
X7