Permitted Activities In Hazardous Areas; Maintenance During Operation - Siemens Simatic CFU Commissioning Manual

Compact Field Unit in the enclosure for use in a hazardous area
11.3 Configuration with SIMATIC CFU PA bundle with aluminum enclosure
Observe the following sections:
●
●
● Section "Replace pressure compensation element (Page 125)"
11.3.3.2

Permitted activities in hazardous areas

Explosion hazard
Observe the safety information in section "Use in hazardous areas (Page 24)".
Activities
Maintenance of the closed enclosure during operation (visual
checks)
Cleaning the closed enclosure
Opening the enclosure
Maintenance during operation (visual checks with enclosure
opened)
Wiring of fieldbus connections
Wiring except fieldbus connections (e.g. power supply)
Replacing cable glands
Replace pressure compensation element
11.3.3.3

Maintenance during operation

Explosion hazard
Observe the safety information in section "Use in hazardous areas (Page 24)".
Carry out maintenance every 6 months in the hazardous area.
Zone 22
CFU enclosure must not be opened.
124
Section "Permitted activities in hazardous areas (Page 124)"
Section "Maintenance during operation (Page 124)"
DANGER
DANGER
WARNING
Zone 2
Permitted
Permitted
Temporarily permitted for
the permitted maintenance
work
Permitted
Permitted
Not permitted
Permitted
Permitted
Commissioning Manual, 07/2018, A5E39252870-AC
Zone 22
Permitted
Permitted
Not permitted
Not permitted
Not permitted
Not permitted
Not permitted
Not permitted
SIMATIC CFU