Siemens SIPART PS2 Series Operating Instructions Manual page 196

Functional safety
9.6 Maintenance/check
Checking the safety function
Check the safety function as detailed in chapter "Settings (Page 194)"
Checking safety
Verify the safety function of the entire safety circuit on a regular basis in accordance with
IEC 61508/61511. The test intervals are determined in the course of calculations for each
safety circuit of a system (PFD
196
).
AVG
Operating Instructions, 11/2019, A5E00074631-AE
SIPART PS2 with 4 to 20 mA/HART