Siemens SIMATIC CFU Commissioning Manual page 140

Compact Field Unit in the housing for use in a hazardous area
11.3 Configuration with SIMATIC CFU with aluminum housing
Connecting and disconnecting the cables to the CFU
● When laying cables and wiring, observe the following:
– Area of use
– Installation regulations in accordance with EN 60079‑14
– Country-specific regulations.
● Ensure that intrinsically safe and non-intrinsically safe cables are completely separate
during wiring. Install these cables in separate cable conduits.
● Use cable type A, e.g. PB FC Process Cable (blue) as the bus cable, 6XV1830‑5EH10.
● Before connecting them, the cables must be stripped over the specified length.
● Observe the regulations in your country during commissioning.
CFU PA: Rules for connecting a spur line on FB0 to FB7
Explosion hazard
It is forbidden to open the housing during operation in the Zone 22 hazardous area.
De-energize the CFU before carrying out any work on it.
Additional information
You can find additional information in sealing the housing in the following sections
● Section "Use in hazardous areas (Page 29)"
● Section "Tools and tightening torques (Page 186)"
● Section "Use in hazardous areas (Page 29)"
● Section "Permitted activities in hazardous areas (Page 144)"
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DANGER
Commissioning Manual, 08/2019, A5E39252870-AD
SIMATIC CFU