NORSTAT Safety Relays - Handbuch (Seite 71)

application guide safety relays from riese electronic page 67
Dual channel protection door monitoring with
opposite polarity between channels
If the protection door switches are closed, the
output contacts remain unchanged. After pressing
release button of the unit, contacts 13-14, 23-24
and 33-34 close and contact 41-42 closes.
After opening the protection door switches the
contacts return to their normal position without
delay.
Suitable up to category 4; SIL3; PLe reachable
Dual channel protection door monitoring with
automatic activation and with opposite
polarity between channels.
For this application the unit RS-NAGAO must to
be used. The activation works automatically,
since the terminals X2 and X1/S22 are bridged.
Once the protection door switches close, the
contacts 13-14, 23-24 and 33-34 close and
contact 41-42 opens. After opening the protection
door switches the contacts return to their normal
position without delay.
Suitable up to category 4; SIL3; PLe reachable
Dual channel application for four wire safety
mats with opposite polarity between channels
For this application a RS-NAGAO is needed. The
version 24V AC/DC cannot be used for safety-
mats. The terminals X2 and X1/S22 are bridged.
So the activation works automatically. Contacts
13-14, 23-24 and 33-34 close after power is on or
after steps off or the safety mat. When the safety
mat is stepped on, the contacts fall back into their
normal position without delay.
Suitable up to category 4; SIL3; PLe reachable
Æ It must be guaranteed that the safety-mat or
safety
contact edge -during load with standard weight-
does not have a resistance higher than 1
Ω
When the start - release is desired, replace the bridge through a start - key.
X2 S11 X1 /
S22
K12 S12 PE 13 23 33 41
K12 X2 S11
S22
X1/
F
re
ig
ab
e
re
le
as
e
S1
33 S12 PE 13 23 41
S2
K12 X2 S11
S22
X1/
S1
33 S12 PE 13 23 41
S2
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