NORSTAT Safety Relays - Handbuch (Seite 62)

application guide safety relays from riese electronic page 59
h) RS-NAGV
Two channel emergency switch
With this application terminals X1 and X2 have
to be bridged.
Pressing the on switch the device will be
activated. The contacts 13-14, 23-24 and 33-34,
43-44, 53-54, 63-64 close and the contacts 71-
72, 81-82, 91-92, 101-102 open. By activating
the off-switch or the emergency switch the
contacts return to their normal position.
Suittable up to category 4; SIL3; PLe reachable
Two channel emergency switch with
monitoring of the on-switch
In this application the proper start and stop of
the on-switch will be monitored. Through a short
operation of the on-switch, contacts 13-14, 23-
24, 33-34, 43-44, 53-54 and 63-64 close with a
delay of appr. 100 ms, after releasing the on-
switch. When the emergency stop is pressed,
the contacts return to their normal position
without delay.
Suittable up to category 4; SIL3; PLe reachable
Two channel emergency switch with external
contact expansion (1 contactor) and contact
control
Contacts 14-14 will close when the safety relay
is activated through the on-switch. The external
contactor pulls on. Since the external contactor
has contacts with positive guidance, the correct
operation of terminals X1 and X2 will be
controlled. In case of welding of one of the
external normally open contacts the normally
closed contact remains open. X1 and X2 will be
not bridged. The safety relay and the external
contactor cannot be activated.
In this application the redundancy of the
contacts of the external contactors is not
accomplished.
Suittable up to category 2; SIL1; PLd reachable
Not-
STOP
E-
Halt/
Ein
Not-
STOP
E-
Halt/
Ein
T11 T34 X1 X2 T12 T22 T44 13... ...101
Not-
STOP
E-
Halt/
Ein
Knagv
13
14
T34 T11 X1 X2 T12 T22 T44 13... ...101
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