Installation; Mounting The Ex Module Group; Safety Measures In Hazardous Areas; Mounting An Ex Module Group (Overview) - Siemens SIMATIC ET 200SP HA System Manual

Installation

5.1

Mounting the Ex module group

5.1.1

Safety measures in hazardous areas

Note
Working on energized electrical installations and apparatus in hazardous industrial premises is
prohibited. This also includes the disconnection of live control lines for test purposes.
Work on intrinsically safe electrical circuits is permitted as an exception, in special cases also
work on other electrical systems, whereby the operator must have certified in writing that there
is no risk of explosion for the duration of the work at the place of work.
If necessary, a fire permit must also be obtained.
Earthing and short-circuiting may only be performed in hazardous areas if there is no risk of
explosion at the grounding and short-circuit point.
Use measuring instruments which are approved for the zones to test for no voltages.
Note
Module in Zone 2
In general, it is not allowed to pull or plug modules in Zone 2.
Before starting work, ensure that no explosive atmosphere is present and that the power supply
is switched off.
5.1.2

Mounting an Ex module group (overview)

Mounting position
You can mount the I/O station with Ex module groups in horizontal or vertical mounting
position. The preferred mounting position is horizontal mounting to a vertical wall.
Requirement
The rules for configuring the I/O station are taken into account:
Rules for configuring the I/O station (Page 37)
Modules for devices in a hazardous area
System Manual, 04/2021, A5E50165138-AA
5
51