NORSTAT Safety Relays - Handbuch (Seite 78)

application guide safety relays from riese electronic page 74
Dual channel protection door monitoring with
start monitoring and opposite polarity
between channels
If the safety switches S1 and S2 are closed, the
output contacts remain unchanged. Through a
short operation of the release switch the contacts
13-14, 23-24 and 77-78 close after the releasing
of the switch with a delay of approximately 100
ms.
After opening the safety switches the contacts
13-14 and 23-24 return to their normal position
without delay. The contact 77-78 remains open
during the selected time delay.
up to category ...
immediate switching: 4; SIL3; PLe reachable,
time delayed output: 3; SIL2; PLd reachable
Dual channel protection door monitoring with
automatic activation and with opposite
polarity between channels
In this application the activation of the device
works automatically, since the terminals T11 and
T34/X1 are bridged. If the protection door
switches are closed, the contacts close with a
delay of approximately 100 ms. After opening the
protection door switches the contacts 13-14 and
23-24 return to their normal position without
delay. The contact 77-78 remains open during the
selected time delay.
up to category ...
immediate switching: 4; SIL3; PLe reachable,
time delayed output: 3; SIL2; PLd reachable
T34/ K21 T11
X1
T12 X2 K22
S1 S2
Freigabe/
release
PE/
B2
23 13 77
13 K21 T11 T34/
X1
T12 X2 K22 PE/
B2
S1 S2
23 77
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