LED displays

LED	Display
K-Bus run (green)	off	no data transfer on the K-bus
K-Bus run (green)	on	Data transmission on the K-bus is active
Sync (green)	off	Terminal is not synchronized with the mains*
Sync (green)	on	Terminal has synchronized itself with the mains*
ON (green)	off	Process data are zero
ON (green)	on	Process data are not zero
Error (red)	on	A load-side overcurrent was detected

*) Synchronization with the mains can only occur if a load is connected!

WARNING

Risk of electric shock!

With the Sync LED switched off mains voltage may still be present at the KL2791 output!
At this stage, the synchronization was not yet performed!