Use Of The Et 200Isp In Category M2 Of Equipment-Group I (Mining); Restricted Number Of Connectable Electronics Modules - Siemens SIMATIC ET 200iSP Operating Instructions Manual

Configurations (principle)

4.6 Restricted Number of Connectable Electronics Modules

Intrinsically safe circuit
Connecting an intrinsically safe sensor, actuator, or HART field device to the input/output of an
electronic module must produce an intrinsically safe circuit! Always check for resultant safety
values when you select the sensors, actuators and HART field devices for an electronic module.
4.5

Use of the ET 200iSP in category M2 of equipment-group I (mining)

Requirements
The following conditions must be fulfilled if the ET 200iSP is used in device group I (underground
mining operations and their overground systems) Category M2:
To avoid ignitable sparks, the power supply (PS) and the mounting rail of the ET 200iSP must
be packaged in shock-proof packaging for transportation and storage (e.g. for servicing) and
immediately removed from the hazardous area.
The enclosure in which the ET 200iSP is installed must be approved for device group I, category
M2.
Observe all other requirements concerning use of the ET 200iSP in the hazardous area.
4.6 Restricted Number of Connectable Electronics Modules
Number of electronic modules
Each ET 200iSP station consists of max. 31 electronic modules without redundancy of the
interface module or of max. 32 electronic modules with redundancy of the interface module.
These include digital and analog electronic modules.
The number of electronic modules is limited by the functional current output of the power
supply PS. This maximum permissible current must not be exceeded.
You have to check the configuration with the calculation table (see below) or with the TIA
Selection Tool.
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WARNING
CAUTION
Operating Instructions, 11/2022, A5E00247483-AK
ET 200iSP