NORSTAT Safety Relays - Handbuch (Seite 52)

application guide safety relays from riese electronic page 49
Dual channel emergency circuit with external
contact expansion (two contactors), contact
monitoring and opposite polarity between
channels.
In this application external contactors with
positive guided contacts are used. One normally
closed contact of each contactor must be
connected series to START button and between
the terminals T11 and T34. Contacts 13-14
close when the device is activated by pressing
the START button. The external contactors will
energize. Pressing the OFF or E-STOP button
the contacts of the SAFE S.8 / SAFE S.10 and
the external contactors return to their normal
position.
With the S ext. switch the external contactors
can be operated or turned OFF at any time if the
SAFE S.8 / SAFE S.10 is activated.
Suitable up to category 4; SIL3; PLe reachable
Single channel safety gate monitoring
Without opposite polarity between channels.
If the safety gate switch S1 is closed, the output
contacts remain unchanged. The device will be
activated by pressing the START button.
Contacts 13-14 and 23-24 close with a delay of
approximately 100 ms. Opening the safety gate
switch returns the contacts to their normal
position without delay.
Suitable up to category 2; SIL1; PLd reachable
Dual channel safety gate monitoring without
opposite polarity between channels.
If the safety gate switches S1 and S2 are closed,
the output contacts remain unchanged. The
device will be activated by pressing the Release
switch. Contacts 13-14 and 23-24 close with a
delay of approximately 100 ms. Opening the
safety gate switches returns the
contacts to their normal position without delay.
Suitable up to category 3; SIL2; PLd reachable
T12 T44/
Fr
ei
ga
be
T11 T34
PE
T22
S 1
23 T33 13
T33
S 2
PE
T44/
Freigabe /
Release
T11 T34 T22 T12
S 1
13 23
PE
Not-
Halt/
E-
STOP
T33 T34 T11
K2 ext.
S
TA
R
T
K1 ext.
13
T44/
Uext.
T12 T22 13 23
K2 ext.
K1 ext.
K SAFE S...
14
Sext.
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