ABB IRB 6600 - 175/2.55 User Manual page 330

5 Electrical connections
5.7.6 Encoder interface unit, DSQC 354 (optional)
Designation
DIGIN1
128
Color Description
Green Digital input. Lit when digital input is active. The input is used
for external start signal/conveyor synchronisation point.
If there is no light, there is an error due to one or more of the
following reasons:
• Faulty power supply for input circuit (internal or
external).
• Faulty limit switch, photocell etc.
• Short circuit or broken wire in external wiring or con-
nectors.
• Defective input circuit on board.
A 3HAC 16245-1