NORSTAT Safety Relays - Handbuch (Seite 54)

application guide safety relays from riese electronic page 51
f) RS-NAGP
Using the emergency stop relay in applications requiring a reset function at terminals T11-T34. A failure at
the reset button makes the relay automatically restart after the emergency stop is reset and power is applied
to the relay. This is not allowed according to VDE 0113 and EN418. In the applications section no. 3 to 6,
there are examples given, which show proper connection diagrams to monitor the switch on and off process
of the reset function.
Single channel emergency stop button.
In this application terminals T12 and T22 as well
as X1 and X2 must be bridged. The device is
activated by pressing the start button. Contacts
13-14, 23-24 and 33-34 close, contact 41-42
opens and contact 53-54 gives a transient
contact. By activating the off button or the
emergency stop button the contacts return to their
normal position. In this application the demand of
redundancy in the emergency stop is not
accomplished
.
Dual channel emergency stop button.
Using the dual channel emergency stop button
the terminals T12 and T22 are not bridged. The
function is similar to application No. 1.
In this application a fault in the emergency stop
button will be detected.
Dual channel emergency stop but ton with
monitoring of the start button.
In this application the proper turn on and off of the
start button will be monitored. Through a briefly
operation of the start button contacts 13-14, 23-
24 and 33-34 close after a delay of approximately
100 ms after releasing the start button. If there is
an emergency stop the contacts return to their
normal position without delay.
S
TA
R
T
Not-
Halt/
E-
STOP
X1 T11 T34 X2 T12 X3 T22
S
TA
R
T
Not-
Halt/
E-
STOP
X1 T11 T34 X2 T12 X3 T22
Not-
Halt/
E-
STOP
X1 T11 T34 X2 T12 X3
S
TA
R
T
T22
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