Siemens SIMATIC S7-1500 System Manual page 356

Technical specifications
15.1 Standards and Approvals
IECEx approval
According to IEC 60079-15 (Explosive atmospheres - Part 15: Equipment protection by type of
protection "n") and IEC 60079-0 (Explosive atmospheres - Part 0: Equipment - General
requirements).
OR
According to IEC 60079-7 (Explosive atmospheres - Part 7: Equipment protection by increase
safety "e") and IEC 60079-0 (Explosive atmospheres - Part 0: Equipment - 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 IEC 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.
CCCEx approval
According to GB/T 3836.8 (Explosive atmosphere - Part 8: Equipment protection by type of
protection "n") and GB/T 3836.1 (Explosive atmospheres - Part 1: Equipment - General
requirements).
Ex nA IIC T4 Gc
Special conditions in hazardous areas:
• The equipment shall only be used in an area of not more than pollution degree 2, as
defined in GB/T 16935.1.
• The device must be installed in a suitable enclosure that ensures a degree of protection of
at least IP54 according to GB/T 3836.8. The ambient conditions must be taken into
consideration for use.
• It must be ensured that the transient protection is set to a value which does not exceed
140% of the rated peak voltage value at the supply terminals of the device.
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S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD