Siemens S5-135U/155U - Manual (Page 44)

3-18
System Manual
C79000-G8576-C199-06
A power socket should be fitted in each cabinet for the AC supply to
programmers. The sockets should be powered from the distribution system to
which the protective conductor for the cabinet is also connected.
Use incandescent bulbs, such as LINESTRA lamps, for cabinet lighting.
Avoid using fluorescent lamps because they generate interference fields. If
the use of fluorescent lamps cannot be avoided, apply the measures shown in
the following figure.
Shielded Cable
Screen Over the Lamp
Metal-Enclosed Switch
AC Filter or
Shielded Power Cable
Figure 3-7 Measures for Interference Suppression of Fluorescent Lamps in a
Cabinet
AC Power
Connection for
Programmers
Cabinet Lighting
Installation Guidelines