Functional earth (FE)
Functional earth via the fastening holes
The fastening holes also serve as connections for the functional earth (FE).
Make sure that the box is earthed with low impedance via both fastening screws.
Functional earth via the supply lines
Pins 6 of the B17 connectors marked with "FE" are not directly connected with the functional earth potential of the fastening holes.
Connect the functional earth of the "FE" cores in accordance with the following instructions:
- If the remote station is a device with B17 connector: connect the devices with a pre-configured cable. Order number: Beckhoff ZK7208-3031-Axxx.
- Otherwise: Earth the "PE" core with low impedance as near as possible to the remote station.
- Leave the cap nuts and housing of the B17 connectors without contact.