Mounting
4.1 Securing the housing
SCALANCE W788-x / W748-1
28 Operating Instructions, 09/2017, A5E03678333-12
Securing the housing
Grounding connector
Operation of the W7x8 only with connected grounding cable
To operate the SCALANCE W7x8 safely, the housing must make contact with a grounding
cable. Do not use the SCALANCE W7x8 without a grounding cable connected.
The grounding cable is fixed to the housing with a screw. On the rear of the device there is
an M4 threaded hole for this purpose, seeDrilling pattern (Page 29).
Mount the grounding cable before you mount the device
To install the W7x8, you have the following options:
● Wall mounting
● Installing on the S7-300 standard rail
● Installing on the S7-1500 standard rail
● Installing on a DIN rail
Danger of injury by falling objects
If the SCALANCE W7x8 is subjected to strong vibration (> 10 g), mounting on a 35 mm DIN
rail does not provide adequate support. Under such conditions, the device can come out of
the mounting and may cause injury.
In this case, install the device on an S7-300 standard rail or on a wall.
There are no restrictions regarding the installation location for the device. Antennas, in
particular directional antennas, must be mounted according to their characteristics.
If you are installing outdoors, use the SCALANCE W786.
The minimum distance to fluorescent lamps should be 0.5 m.
When installed in a cabinet, we recommend that you do not instal
l relays on the same or on
directly neighboring mounting rails.
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