Siemens AS-i Master CM 1243-2 a Manual page 30

Installation, connection and commissioning of the modules
4.1 Safety instructions
General notes on use in hazardous areas
Risk of explosion when connecting or disconnecting the device
Can cause death, serious injury, or property damage
Explosion hazard
Do not disconnect equipment when a flammable or combustible atmosphere is present.
Note
Requirements for the control cabinet
If the device is used in areas subject to explosion hazard according to Class I, Division 2 or
Class I, Zone 2, it must be installed in an appropriate control cabinet or enclosure.
Notes on use in hazardous areas according to ATEX
Requirements for the control cabinet
For compliance with EU Directive 94 / 9 (ATEX 95), the enclosure must fulfill the
requirements of IP54 or higher according to EN 60529.
NOTICE
Protection from transient overvoltage
Implement measures to prevent transient overvoltages of more than 40% of the rated
voltage. This is ensured if you operate the devices exclusively with SELV (Safety Extra Low
Voltage).
30
WARNING
WARNING
AS-i master CM 1243-2 and AS-i data decoupling unit DCM 1271 for SIMATIC S7-1200
Manual, 04/2013, A5E02655230010A/RS-AA/003