Siemens 3TK28 Manual page 181

Figure 3-94
Figure 3-95
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003
3.8 3TK28 safety relays with contactor relay enabling circuits
with isolated contact, functionally operated
with non-isolated contact, functionally operated
Description of the individual safety relays
181