107026-11-EN FR26 ROW 302 Printed in France 25
Example 5: Start/Restart interlock without Final Switching Device monitoring
(use of example 7 is recommended)
C1 B1
B2C2
C4
B3
Test
Machine stopping
circuitry
FF-SB14R
Signalling
(relay status)
C3 C5
Start P/B (NO)
A3
Signalling
(beam status)
K2
FSD
K1
FSD
FSD: Final Switching Device * 220 Ω + 0.22 µF
Do not forget to change the jumper links position (refer to § 8.6)
A2A1
K1
K2
*
*
In this example, it is necessary to press a NO push- button between C3 and C5 to reset the safety barrier at power up
and after any intrusion in the detection field. However, additional relays are not monitored and a welded contact on
both relays K1 and K2 will not be detected. If a possible failure of K1 and K2 needs to be detected, please refer to
example 6.
FSB14_48
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