RMG USM GT400 Operating Manual page 27

Danger
If access to electrical modules is necessary, the following precautions
must be taken:
• The entire device must be disconnected from the power supply.
• When working with electronic assemblies, a connection must be
established between an earthed object and the body.
Notice
Pay attention to accumulation of water in the housing, because the explo-
sion-proof housing is only conditionally protected from water by the gap
protecting against ignition sparks (IP54).
Rusted or corroded gaps must not be cleaned with grinding materials or
wire brushes; chemical means must be used, such as reducing oils. Then
acid-free anti-corrosive agents, such as ESSO RUST BAN 397, Mobil Oil
Tecrex 39 or equivalent products must be applied to the gaps for protec-
tion.
Danger
The seal for the Ex-e housing must be inspected for damage and replaced
as necessary.
Check cable connections and sealing plugs for tight seating.
Damage to the housing can negate the Ex protection!
If the device is repaired regarding a part which depends on explosion protection, it
may only be put back into operation after it has been checked by a certified expert
(section 1.2.4.4 Qualifikation ).
If repairs are carried out by RMG service, no acceptance by an expert is required.
1 About this manual
Manual USM GT400 · EN10 · May 2021
19