Compact Field Unit in the housing for use in a
hazardous area
11
11.1 CFU in hazardous areas
CFU in housing
The housing serves to integrate a CFU in the automation environment with field devices in a
hazardous area (up to zone 2/22).
● The CFU can be pre-assembled in the housing. The "SIMATIC CFU PA bundle with
aluminum housing" is designed specifically for use in the hazardous area of zone 2/22.
Ordering information can be found in section "Article numbers (accessories / spare parts)
(Page 181)".
● When installing in other housings (including in control cabinets), you must ensure that the
housing, including the CFU, is approved for use in hazardous areas.
The cable shields must be placed in the housing such that they are connected to the functional
earth. Cable glands and sealing plugs are included with "SIMATIC CFU PA bundle with
aluminum housing". The sealing plugs are attached by default. Unused openings in the housing
must be closed at all times.
SIMATIC CFU
Commissioning Manual, 08/2019, A5E39252870-AD 129
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