SCALANCE W788-xPRO/RR / SCALANCE W74x-1PRO/RR
Operating Instructions (Compact), Release 08/2007, A5E00413342-05
87
Mounting
3
3.1 Securing the housing
Wall mounting or standard rail
There are two ways of securing the housing:
● Wall mounting
Use the holes in the housing to screw the device to the wall or on a horizontal surface.
● Standard rail mounting
Mount the SCALANCE W788-xPRO/RR or W74x-1PRO/RR on a 90 mm long, vertically
mounted section of standard rail (S7-300). In this case, the standard rail serves as an
adapter between the wall and SCALANCE W788-xPRO/RR or W74x-1PRO/RR. If you
want to mount the SCALANCE W788-xPRO/RR or W74x-1PRO/RR along with a PS791-
1PRO, you will require a 150 mm long standard rail.
Make sure that there is suitable strain relief for the connecting cable.
CAUTION
Premature aging of the device and cables due to UV radiation
Provide suitable shade to protect the device against direct sunlight. This avoids unwanted
heating of the device and prevents premature aging of the device and cabling. When
operating the SCALANCE W outdoors, it must be mounted so that it is protected from UV.
UV radiation can discolor the front panel of the SCALANCE W788-xPRO/RR or W74x-
1PRO/RR. Discoloring of the front panel does not impair the mechanical stability of the
device. The device must also not be subjected to long periods of rain (provide cover to
protect from rain). The cover should be made of a synthetic material since metal impairs the
radiation of radio waves.
Note
The minimum distance to fluorescent lamps should be 0.5 m. When installed in a cabinet, we
recommend that you do not install relays on the same or on directly neighboring mounting
rails.
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