Siemens SIMATIC S7-1500 System Manual page 484

APPROVED for use in Class I, Division 2, Group A, B, C, D T4;
Class I, Zone 2, Group IIC T4
Installation Instructions for FM
• WARNING - Explosion Hazard - Do not disconnect while circuit is live unless area is known
to be non-hazardous.
• WARNING - Explosion Hazard - Substitution of components may impair suitability for Class
I, Division 2 or Zone 2.
• This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D; Class I, Zone 2,
Group IIC; or non-hazardous locations.
WARNING: EXPOSURE TO SOME CHEMICALS MAY DEGRADE THE SEALING PROPERTIES OF
MATERIALS USED IN THE RELAYS.
ATEX approval
According to EN 60079-15 (Electrical apparatus for potentially explosive atmospheres - Part
15: Type of protection "n") and EN 60079-0 (Electrical apparatus for potentially explosive gas
atmospheres - Part 0: General Requirements).
OR
According to EN 60079-7 (Electrical apparatus for potentially explosive atmospheres - Part 7:
Increased safety "e") and EN IEC 60079-0 (Electrical apparatus for potentially explosive gas
atmospheres - Part 0: General Requirements).
Special conditions in hazardous areas:
1. The equipment shall only be used in an area of not more than pollution degree 2, as defined
in EN 60664-1.
2. The equipment shall be installed in a suitable enclosure providing a degree of protection not
less than IP54 in accordance with EN 60079-15 or EN 60079-7. The ambient conditions
must be taken into consideration for use.
3. Provisions shall be made to prevent the rated voltage from being exceeded by transient
disturbances of more than 119 V.
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF
Technical specifications
16.1 Standards and Approvals
483