ABB AC500 V3 - 2.4.3 Earthing concept (Block diagrams)

2.4.3 Earthing concept (Block diagrams)
NOTICE!
PLC damage due to missing grounding
– Ensure to earth the devices.
– The grounding (switch cabinet grounding, PE) is supplied both by the mains
connection (or 24 V supply voltage) and via DIN rail. The DIN rail must be
connected to the ground before the device is subjected to any power. The
grounding may be removed only if it is certain that no more power is being
supplied to the control system.
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
System assembly, construction and connection
Overall information (valid for complete AC500 product family) > Earthing concept (Block diagrams)
2022/01/31 3ADR010278, 3, en_US 917