Fieldbus controller 750-842
•
91
LED Display
Modular I/O System
ETHERNET TCP/IP
3.2.8.5
Supply voltage status
There are two green LED’s in the controller supply section to display the sup-
ply voltage. The left LED (A) indicates the 24 V supply for the controller. The
right hand LED (C) signals the supply to the field side, i.e. the power jumper
contacts.
LED
Meaning
Trouble shooting
A
green
Operating voltage for the system exists.
OFF
No operating voltage for the system.
Check the supply voltage (24V and 0V).
C
green
Operating voltage for the power jumper contacts
exists.
OFF
No operating voltage for the the power jumper con-
tacts.
Check the supply voltage (24V and 0V).