Transition Diagramm - Weidmuller UR20-4DI-4DO-PN-FSOE Manual

4.2

Transition diagramm

State 1
Idle
24 V Safe off
SS1 off
Delay time
expired
State 3
Wait for power off
24 VSafe on
SS1 off
Transition diagramm of safe power-feed modules
With the delay SIL module (UR20-PF-O-2DI-DELAY-SIL)
switching off can be delayed by a defined time so that,
for example, a machine can be shut down in a controlled
manner. The delay time can be set in four steps between
0 and 60 seconds (corresponds to stop category 1 as per
EN 60204).
1484600000/04/06.2017
4 System description of safe power-feed modules | Transition diagramm
Safety circuit active
Manual start mode or autostart mode after power on
Safety circuit inactive
Safety circuit active
Autostart mode
Safety circuit inactive
delay
1) Both channels of a safety circuit must get active within a discrepancy time of 0.5s max.
2) The 24 V Safe output remains on until delay time is expired.
3) At least one channel of the safety circuit.
u-remote IP20 modules for functional safety manual
1
Wait for start
24 V Safe off
3
1
3
24 V Safe on
State 2
SS1 off
Manual start
key pressed
State 4
Running
SS1 on
17