ABB AC500 V3 Hardware Manual page 987

2.
2.6.3.5 Mounting/Demounting the communication modules
Communication modules are mounted on the left side of the processor module on the same
terminal base. The connection is established automatically when mounting the communication
module.
After mounting the terminal base, mount the communication modules.
2022/01/31
The demounting is carried out in a reversed order.
Press above and below, then remove the module.
NOTICE!
Risk of damaging the PLC modules!
Overvoltages and short circuits might damage the PLC modules.
– Make sure that all voltage sources (supply voltage and process supply
voltage) are switched off before you begin with operations on the system.
– Never connect any voltages or signals to reserved terminals (marked with
---). Reserved terminals may carry internal voltages.
3ADR010278, 3, en_US
System assembly, construction and connection
AC500 (Standard) > Mounting and demounting
987