Maintaining Terminal Boxes; Corrective Maintenance - Siemens SIMOTICS XP 1MB5 Series Operating Instructions Manual

9.2.17

Maintaining terminal boxes

Requirement
The machine is de-energized.
Checking the terminal box
● Terminal boxes must be regularly checked for tightness, undamaged insulation, and tight
terminal connections.
● If dust or humidity have infiltrated the terminal box, this should be cleaned and dried
(particularly the insulators).
Check all the seals and sealing surfaces and address the cause of the leakiness.
● Check the insulators, connectors and cable connections in the terminal box.
● Replace any damaged components.
9.3

Corrective maintenance

Observe the following when carrying out any work on the machine:
● Comply with the general safety instructions (Page 11)
● Comply with the applicable national and sector-specific regulations.
● When using the machine within the European Union, comply with the specifications laid
down in EN 50110‑1 regarding safe operation of electrical equipment.
Comply with the IEC / EN 60079‑17 standard during all service and maintenance work on the
machine.
Risk of explosion as a result of inadmissible repair work
Repairs are only permissible within the scope of the work described in these operating
instructions. Otherwise an explosion can occur in an explosive atmosphere. This can result in
death, serious injury or material damage.
● For repairs to go beyond this scope, please contact the Service Center.
1MB5 SH 400/450
Operating Instructions, 05/2019, A5E45959221A
WARNING
Short-circuit hazard
Short-circuits can occur as a result of damaged components. This can result in death,
serious injury or material damage.
Replace damaged components.
Maintenance
9.3 Corrective maintenance
119