ABB AC500 PLC Hardware Manual page 1011

The following figures show the electrical connection of the Ethernet bus module CI501-PNIO.
Further information is provided in the System Technology chapter PROFINET.
Connection of the Digital Inputs
The following figure shows the electrical connection of the digital input DI0. Proceed with the
digital inputs DI1 to DI7 in the same way.
2019/04/17
Generally, analog signals must be laid in shielded cables. The cable shields
must be earthed at both sides of the cables. In order to avoid unacceptable
potential differences between different parts of the installation, low resistance
equipotential bonding conductors must be laid.
Only for simple applications (low electromagnetic disturbances, no high require-
ment on precision), the shielding can also be omitted.
3ADR010121, 13, en_US
Communication Interface Modules (S500) > PROFINET
Device Specifications
1011