—
6 Wiring
6.1 Grounding concept
NOTICE!
PLC damage due to missing grounding
–
Make sure to ground the devices.
–
The grounding (switch cabinet grounding) is supplied both by the mains
connection (or 24 V supply voltage) and via the DIN rail. The DIN rail
must be connected to ground before power is supplied to the device. The
grounding may be removed only if it is certain that no more power is being
supplied to the control system.
–
In case of screw mounting, grounding must be ensured by the screws.
Power
DC532/DI524
I/O Terminal Unit TU515/TU516
ZP
supply
DIN
rail
I/O-Bus
Digital
UP
CH-ERRx
0V
UP
+24V
Inputs/outputs
I/O-Bus
I/Os
I/O interface
1 M
1 M
ZP
ZP
Block diagram:
Digital I/O
modules
Wiring
Grounding concept
2023/03/03
3ADR011074, 1, en_US
58