USER HANDBOOK 1.2 | ECC DIO / ECC AIO
Berghof Automation GmbH | Harretstrasse 1 | 72800 Eningen | www.berghof.com
250000600_ECC-DIO-AIO_Anwenderhandbuch_EN.docx
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5.2. Earth
The functional earth dissipates HF currents and increases the electromagnetic immunity of the device.
HF interference is transferred internally from the electronic circuit board to the metal housing. The metal
housing requires its own suitable connection to a functional earth.
Earthing the device
Requirements:
The support rail has a conductive contact with the control cabinet.
The control cabinet itself must be earthed.
Make sure that the device housing has a conductive contact with the support rail.
If specifically required in certain installations, additional PE conductors may be connected to protect
all metallic parts from high voltages on the underside of the device (PE connection).
The device is now earthed.
Where necessary, the functional earth (FE) of the device can also be connected directly to the
earth.
Fig. 5: Functional earth (FE) on the device