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4 System description of safe power-feed modules
| Transition diagramm
17
u-remote IP20 modules for functional safety manual
1484600000/04/06.2017
4.2 Transition diagramm
State 2
Wait for start
24 VSafe off
SS1 off
State 4
Running
24 VSafe
on
SS1
on
Safety cir
cuit
activ
e
1
Autost
art mode, not aft
er po
wer on
Safety cir
cuit activ
e
2
Manual st
art mode
Safety cir
cuit
inactiv
e
3
no dela
y
Manual start
key pressed
Delay time
expired
Safety circuit active
1
Manual start mode or autostart mode after power on
Safety circuit inactive
3
Safety circuit active
1
Autostart mode
Safety circuit inactive
3
delay
State 1
Idle
24 VSafe off
SS1 off
State 3
Wait for power off
24 VSafe
on
SS1 off
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.
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).
Summary of Contents for UR20-4DI-4DO-PN-FSOE
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