Siemens SIMATIC ET 200SP HA System Manual page 31

Due to the possible danger of explosion, ensure that the following components are suitable for
use:
• Components that are located directly in a hazardous area
• Components with connection to the hazardous area
Planning the Ex module group
• Maximum mechanical configuration of the Ex module group (Page 39)
• Planning Ex I/O modules
– Perform the planning based on the requirements of the plant.
– If system expansions are foreseeable, consider reserve modules.
• Planning potential groups and Ex power modules (Page 47)
Additional information
• Rules and regulations for operation (Page 35)
• Minimum clearances (Page 41)
• Power supply and potential ratios (Page 43)
Modules for devices in a hazardous area
System Manual, 04/2021, A5E50165138-AA
4.1 Planning the configuration of an ET 200SP HA distributed I/O
Plant planning
31