Siemens SIMATIC ET 200iSP Operating Instructions Manual page 68

Configurations (principle)
4.4 Rules for operation in hazardous areas
Rules for configuration of the ET 200iSP in Zone 22
If you use the ET 200iSP in zone 22, then you must observe the following rules:
1. Install the ET 200iSP in a metallic (see section "Installation rules (Page 101)"), dust-protected
enclosure with at least degree of protection IP5X (according to directive 2014/34/EU for
category 3D). Additional requirements (surface temperature, for example) can be found in
the certification document for the enclosure (see Appendix "Article numbers (Page 419)").
2. See points 2 to 5: Rules for the configuration of the ET 200iSP in Zone 1
Rules for the configuration of ET 200iSP in the safe area
If you use the ET 200iSP in the safe area, then you must observe the following rules:
1. Install the ET 200iSP in an enclosure with degree of protection IP20.
2. See points 2, 4 and 5: Rules for the configuration of the ET 200iSP in Zone 1
Rules for configuring the encoders, actuators, HART field devices in the hazardous area
The verification of intrinsic safety for each field circuit must be made according to the regulations
stipulated by the relevant standards for configuration, selection and installation.
A simple, intrinsically safe circuit results from attaching a sensor, actuator or HART field device
to an input or output of the electronic modules.
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DANGER
Conductive dust
If the Zone 22 potentially explosive area is subject to conductive dust (for example, metal
dust), the rules for zone 21 apply.
Operating Instructions, 11/2022, A5E00247483-AK
ET 200iSP