Siemens SIPART PS2 Operating Instructions Manual page 22

Safety information
2.7 Use in hazardous areas
Loss of safety of device with type of protection "Intrinsic safety Ex i"
If the device or its components have already been operated in non-intrinsically safe circuits or
the electrical specifications have not been observed, the safety of the device is no longer
ensured for use in hazardous areas. There is a risk of explosion.
● Connect the device with type of protection "Intrinsic safety" solely to an intrinsically safe
● Observe the specifications for the electrical data on the certificate and/or in Technical data
22
WARNING
circuit.
(Page 281).
SIPART PS2 with PROFIBUS PA
Operating Instructions, 05/2019, A5E00127926-AC