Datasheet

Relays for functional safety
Safety relays PNOZsigma
PNOZ s50
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]
2016-09
899
Switching the power circuits on and off (slow shutdown S35, S36)
If the switching times are not critical, the loads at the power circuits can also be shut down
slowly. A connected brake is permitted to have longer application times, for example. The
brake switches with lower noise and is lower wearing.
A 1/0 pulse edge at one of the slow shutdown inputs (S35 or S36) switches off the corres-
ponding power circuit (O1+, O2+) in single-pole mode. A flywheel diode means that the cur-
rent only dissipates the magnetic field slowly.
Power circuit 1 S35 O1+, O1-
1/0 pulse edge Switches off power circuit 1
Power circuit 2 S36 O2+, O2-
1/0 pulse edge Switches off power circuit 2
Conditions for fast and slow shutdown
To shut down the power circuits, the following conditions must be met:
Shutdown Y10/Y11 S35 O1+/O1-
Fast 1/0 pulse edge 1 -> 0
Slow 1 1/0 pulse edge -> 0
Shutdown Y20/Y21 S36 O2+/O2-
Fast 1/0 pulse edge 1 -> 0
Slow 1 1/0 pulse edge -> 0