Notes On Use In Hazardous Areas According To Ul Hazloc And Fm - Siemens SIMATIC NET S7-1500 Operating Instructions Manual

Installation, connecting up, commissioning, operation
3.1 Important notes on using the device
Suitable cables at high ambient temperatures in hazardous area
At an ambient temperature of ≥ 60 °C, use heat-resistant cables designed for an ambient
temperature at least 20 °C higher. The cable entries used on the enclosure must comply
with the IP degree of protection required by EN IEC / IEC 60079-0, GB 3836.1.
Transient overvoltages
Take measures to prevent transient overvoltages of more than 40% of the rated voltage (or
more than 119 V). This is the case if you only operate devices with SELV (safety extra-low
voltage).
3.1.3

Notes on use in hazardous areas according to UL HazLoc and FM

This equipment is suitable for use in Class I, Division 2, Groups A, B, C and D or non-
hazardous locations only.
This equipment is suitable for use in Class I, Zone 2, Group IIC or non-hazardous locations
only.
When used in hazardous environments corresponding to Class I, Division 2 or Class I, Zone
2, the device must be installed in a cabinet or a suitable enclosure.
Wall mounting outside of the control cabinet or housing does not fulfill the requirements of
the FM approval.
EXPLOSION HAZARD
Replacing components may impair suitability for Class 1, Division 2 or Zone 2.
If the device is installed in a cabinet, the inner temperature of the cabinet corresponds to
the ambient temperature of the device.
26
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
Operating Instructions, 04/2023, C79000-G8976-C355-05
SIMATIC CM 1542-1