Hardware installation
3.1 Connecting to the PG/PC
CP 5711
Operating Instructions, 12/2021, C79000-G8976-C283-08
19
Insufficient isolation of intrinsically safe and non-intrinsically safe circuits
Risk of explosion in hazardous areas
• When connecting intrinsically safe and non-intrinsically safe circuits, ensure that the
galvanic isolation is performed properly in compliance with local regulations (e.g. IEC
60079-14).
• Observe the device approvals applicable for your country.
Unauthorized repair of devices in explosion-proof design
Risk of explosion in hazardous areas
• Repair work may only be performed by personnel authorized by Siemens.
Impermissible accessories and spare parts
Risk of explosion in hazardous areas
• Only use original accessories and original spare parts.
• Observe all relevant installation and safety instructions described in the manuals for the
device or supplied with the accessories or spare parts.
Hot surfaces
Risk of burns during maintenance work on parts with a surface temperature above 70 °C
(158 °F).
• Take appropriate protective measures, for example, wear protective gloves.
• Once maintenance work is complete, restore the touch protection measures.
Permissible degree of pollution
The device may only be operated in an environment of contamination class 1 or 2 (see
EN/IEC 60664-1, GB/T 16935.1).
Cleaning the housing
• In the hazardous area
Only clean the outer parts of the housing with a damp, but not wet, cloth.
• In non-hazardous area
Only clean the outer parts of the housing with a dry cloth.
Do not use liquids or solvents.
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