ABB AC500 PLC Hardware Manual page 1189

Fig. 200: AC500, equipotential bonding
1 Cabinet 1
2 Cabinet 2
3 Power supply for the CPU
4 Fuse for the CPU power
5 Power supply for the I/Os
6 Fuse for the I/O power
7 For fuses for the contacts of the relay outputs
8 0V rail
9 Earthing of the 0V rail
10 Cabinet earthing
11 Equipotential bonding between the cabinets min. 16 mm
12 Cable shields earthing
13 Fieldbus connection (e.g. Ethernet)
2.4.5 Power Consumption of an Entire Station
The power consumption of a complete station consists of the sum of all individual consump-
tions.
2019/04/17
Overall Information (valid for complete AC500 Product Family) > Power Consumption of an Entire Station
– The impedance of equipotential bonding must be equal or lower than 10 %
of the shield impedance of the shielded signal cables between the same
points.
– The conductor cross section of a equipotential bonding must be 16 mm² to
withstand the maximum possible compensating current.
– Equipotential bondings and shielded signal cables should be laid close to
each other.
– Equipotential bondings must be connected to PE with low impedance.
3ADR010121, 13, en_US
System Assembly, Construction and Connection
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