Siemens Simatic CFU User Manual

Observe the following sections:
● Section "Permitted activities in hazardous areas (Page 144)"
● Section "Maintenance during operation (Page 144)"
● Section "Replace pressure compensation element (Page 145)"
11.3.3.2 Permitted activities in hazardous areas
DANGER
Explosion hazard
Observe the safety information in section "Use in hazardous areas (Page 29)".
Activities Zone 2 Zone 22
Maintenance of the closed housing during operation (visual
checks)
Permitted Permitted
Damp cleaning of the closed housing Permitted Permitted
Opening the housing Temporarily permitted for
the permitted maintenance
work
Not permitted
Maintenance during operation (visual checks with housing
opened)
Permitted Not permitted
CFU PA: Wiring of fieldbus connections Permitted Not permitted
Wiring except fieldbus connections (e.g. power supply) Not permitted Not permitted
Replacing cable glands Permitted Not permitted
Replace pressure compensation element Permitted Not permitted
11.3.3.3 Maintenance during operation
DANGER
Explosion hazard
Observe the safety information in section "Use in hazardous areas (Page 29)".
Carry out maintenance every 6 months in the hazardous area.
WARNING
Zone 22
CFU housing must not be opened.
Compact Field Unit in the housing for use in a hazardous area
11.3 Configuration with SIMATIC CFU with aluminum housing
SIMATIC CFU
144 Commissioning Manual, 08/2019, A5E39252870-AD

Siemens Simatic CFU Specifications

General

Brand	Siemens
Model	Simatic CFU
Category	I/O Systems
Language	English