NORSTAT Safety Relays - Handbuch (Seite 22)

application guide safety relays from riese electronic page 21
Safety gate applications SAFE 2 / 2.1
Single-channel safety gate monitoring.
If the button S1 of the safety gate is closed the
output contacts do not change. Pressing the
START-button activates the SAFE2. The
contacts 13-14,23-24 close.
After the opening of the protection door switch
the contacts return to their normal position
without delay.
up to category 2; SIL1; PLd reachable
Additional advice
With wiring according to application the user
must provide a connection to the machine control
for cyclic testing.
Dual-channel protection door monitoring with
opposite polarity between channels.
If the safety gate switches are closed, the output
contacts remain unchanged. After the release of
the unit, the contacts 13-14 and 23-24 close.
After opening the protection door switches the
contacts return to their normal position without
delay.
up to category 4; SIL3; PLe reachable
Dual-channel protection door monitoring with
automatic activation and with opposite
polarity between channels.
(only Safe 2.1)
For this application the unit SAFE 2.1 has to be
used. The activation works automatically, since
the terminals S33/S34 are bridged. If the
protection door switches close, the contacts 13-
14, 23-24 close. After the opening of the
protection door switches the contacts return to
their normal position without delay.
up to category 4; SIL3; PLe reachable
A1 S34 S33 S11 S12 S21 S22 A2
Start
+24V 0V
S1
S1 S2
A1 S34 S33 S11 S12 S21 S22 A2
+24V 0V
Freigabe /
release
S1 S2
A1 S34 S33 S11 S12 S21 S22 A2
+24V 0V
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