Siemens SIMATIC ET 200SP HA System Manual page 40

Plant planning
4.4 Maximum mechanical configuration of the Ex module group
Components
Ex BaseUnit for Ex power mod‐
ule
Ex power module
Ex BaseUnit for Ex I/O module 1 per Ex I/O module
Ex I/O module
Overload of the Ex power module
Hazardous plant conditions
You must ensure that only approved components are operated on an Ex power module.
• A failure of the Ex power module and the connected I/O is possible.
• Undefined reactions can occur with an impermissible setup.
Termination of the Ex module group
NOTICE
Components permitted after an Ex module group
The Ex module group ends when one of the following modules is plugged in to the right of an
Ex I/O module:
• Ex power module
• Server module
Only these modules are allowed to the right of an Ex module group!
See also
Useful information for use in hazardous areas (Page 35)
40
Quantity
1
1
As required by the plant
WARNING
Note
Mount the Ex module groups to the right of the standard I/Os.
Note:
• Planning the configuration of an ET 200SP HA distributed I/O
(Page 29)
• Planning the configuration of an ET 200SP distributed I/O
(Page 32)
An SELV/PELV power supply is required to supply the Ex power
module.
Power supply (SELV/PELV) (Page 43)
The Ex power module generates the supply voltage for the Ex
module group from this (safely separated extra-low voltage,
voltage limited according to Ex ia).
Technical specifications - Ex power module (Page 113)
Mount the Ex BaseUnit for Ex I/O modules to the right of the Ex
power module.
Maximum number of modules depending on the current re‐
quirement and output current of the Ex power module.
System Manual, 04/2021, A5E50165138-AA
Modules for devices in a hazardous area