Connecting The Equipotential Bonding Circuit - Siemens SIMATIC HMI Unified Comfort MTP700 Operating Instructions Manual

Connecting the cables
NOTICE
Observe local installation regulations
Observe the local installation regulations and the local installation conditions, such as
protective wiring for power supply lines, when connecting the cables.
Short-circuit and overload protection
Different measures for short-circuit and overload protection are required when setting up an
entire plant. The type of components and the level of obligation for the protective measures
depends on the regulation that applies to your plant configuration.
● When connecting the cables, make sure that you do not bend the contact pins.
● Secure the cable connectors by fastening the connector to the socket with screws.
● Provide adequate strain relief for all connecting cables.
● The pin assignment of the ports is described in the technical specifications.
3.4.2

Connecting the equipotential bonding circuit

Differences in electrical potential
Differences in electrical potential can develop between spatially separate plant components.
Such electrical potential differences can lead to high equalizing currents across the data
cables and therefore to the destruction of their interfaces. Equalizing currents can develop if
the cable shielding is terminated at both ends and grounded to different plant components.
Differences in potential may develop when a system is connected to different mains
supplies.
Unified Comfort Panels
Operating Instructions, 03/2020, A5E46641217-AA
Mounting and connecting the device
3.4 Connecting the device
41