Siemens SIMATIC S5-100U System Manual page 72

Installation Guidelines
Mains Connection for Programmers
Provide a power connection for a programmer in each cabinet. The plug must be supplied from the
distribution line to which the protective ground for the cabinet is connected.
Cabinet Lighting
Use, for example, LINESTRA® lamps for cabinet lighting. Avoid the use of fluorescent lamps since
these generate interference fields. If you cannot do without fluorescent lamps, you must take the
measures shown in Figure 3.28.
Shielding grid over lamp
Figure 3-28. Measures for Suppressing Interference from Fluorescent Lamps
in the Cabinet
3-34
Shielded cable
Metal-encased switch
Mains filter or shielded mains cable
S5-100U
EWA 4NEB 812 6120-02b