NORSTAT Safety Relays - Handbuch (Seite 48)

application guide safety relays from riese electronic page 46
S ingle channel safety gate monitoring.
(without opposite polarity between channels)
If the button S1 of the safety gate is closed the
output contacts do not change. Pressing the
START button activates the SAFE 4. The
contacts 13-14 and 23-24 close. Opening S1 of
the safety gate the outputs open immediately .
Suitable up to category 2; SIL1; PLd reachable
Dual-channel protection door monitoring with
opposite polarity between channels.
If the protection door switches are closed, the
output contacts remain unchanged. After
pressing the start button the unit is active and
the contacts 13-14 and 23-24 close.
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 SAFE 4.1 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 opening the protection door
switches the contacts return to their normal
position without delay.
At 24V AC/DC version, the automatic start
already takes place when the device is connected
to the supply voltage. With other versions the first
activation takes place while closing the protection
door.
Suitable up to category 4; SIL3; PLe reachable
33 41 S33 S34 A1(+) A2(-)
S1
Freigabe/
release
24V AC/DC
S11 S22 S21 13 S12 23
24V AC/DC
A1(+) S33 S34
Freigabe/
release
S11 A2(-) S22 S21 23 S12 13 33 41
S2 S1
24V AC/DC
A1(+) S33 S34 S11 A2(-) S22 S21 23 S12 13 33 41
S2 S1
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