Siemens SIMATIC NET SCALANCE W748-1, Руководство по эксплуатации

Страница: 40 / 78

Installation and removal
5.2 Securing the housing
SCALANCE W788-x / W748-1
40
Operating Instructions, 03/2022, A5E03678333-17
5.2 Securing the housing
Installation options
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
CAUTION
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 a standard rail or on a wall.
Installation location
There are no restrictions regarding the installation location for the device. Antennas, in
particular directional antennas, must be mounted according to their characteristics.
Additional notes
• For operation 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 install relays on the same
or on directly neighboring mounting rails.
Grounding connector
WARNING
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, see Drilling pattern (Page 41).
Mount the grounding cable before you mount the device.