Use In Areas Subject To An Explosion Hazard Due To Gases Or Dust - Siemens 3RS2 Manual

ATEX

3.2 Use in areas subject to an explosion hazard due to gases or dust

Note
The intended use of the devices is permitted in systems for industrial applications in hazardous
areas up to Zone 1 (gas, vapors, fog) or Zone 21 (dust).
ATEX marking:
• Dust: [b1] [Ex h] [pyb] [tb] [mb] [kb] [sb] III C Db
• Gas: [b1] [Ex h] [db] [eb] [pyb] [mb] [ob] [q] [kb] [sb] II C Gb
3.2 Use in areas subject to an explosion hazard due to gases or dust
Requirements for use in hazardous areas
The device is tested in accordance with the ATEX Directive 2014/34/EU and is also certified for
use in accordance with DIN EN 50495 of the ATEX Directive. It monitors hazardous gas or dust
atmospheres. In addition, the device meets the requirements of DIN EN 61508 and
DIN EN 13849 (SIL 1 / PL c).
All components and their corresponding circuitry which belong to the critical sequence of the
analog input 4 mA to 20 mA (exists on the sensor expansion module) have ATEX certification.
Note
This means you always need a sensor expansion module 3RS29 to use ATEX applications.
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3RS2 temperature monitoring relay
Equipment Manual, 02/2022, A5E42462552002A/RS-AB/002