Siemens Automation System S7-400 - Manual (Page 172)

Assembling and Installing Systems
A-4
Automation System S7-400 Hardware and Installation
A5E00850741-01
Protection Against Other Electrical Effects
The following table shows the other external effects against which you must
provide protection.
Protection against ... ... by Means of ...
inadvertent actuation of
operator controls
a suitable arrangement or covering of keyboard and
operator controls or a recessed arrangement of operator
controls.
splashing and surging water suitable protective devices or installation in waterproof
housings.
direct solar radiation suitable shading or installation in appropriately sheltered
locations.
mechanical damage suitable demarcation, protective devices, or installation in
rugged housings.