NORSTAT Safety Relays - Handbuch (Seite 70)

application guide safety relays from riese electronic page 66
d) RS-NAGA / RS-NAGAO
(RS-NAGA : with start control)
(RS-NAGAO: without start control)
Dual channel emergency stop
(without opposite polarity between channels)
By pressing the start button, the unit will be
activated. For this application, terminals X1/S22
and K12 are not bridged. Instead, a redundant
emergency stop contact is applied. In this
application a fault in the emergency stop is
detected.
If using RS-NAGAO with automatic start the two
emegency stop contact must be used not only
one.
Suitable up to category 3; SIL2; PLd reachable
Dual channel emergency stop (with opposite
polarity between channels)
In this application are the terminal connections
PE and K12,S12 changed. By pressing the start
button the device will be activated. Terminals 13-
14, 23-24 and 33-34 close, and contact 41-42
opens. Pressing the emergency stop- or off-
button initiates a stop and the outputs open
immediately.
Suitable up to category 4; SIL3; PLe reachable
Dual channel emergency stop with external
contact extension (t wo contactors), contact
monitoring and opposite polarity between
channels
This application uses two external contactors with
positive guidance. Each normally closed contact
of these external contactors must be connected in
series to the start button to the terminals X1/S22
and X2. The function is similar to application no 2.
Through the switch S ext. the external contactors
can be operated or turned off at any time if the
RS-NAGA / RS-NAGAO is activated.
Suitable up to category 4; SIL3; PLe reachable
Dual channel protection door mo nitoring
without opposite polarity between channels
With the dual channel protection door monitoring
terminals X1/S22 and K12 are not bridged. The
function is like application no 1. In this application
a fault in the protection door monitoring switch will
be detected.
Suitable up to category 3; SIL2; PLd reachable
X2 S11 K12 X1/
S22
Fr
ei
ga
be
S1 S2
S12 PE 13 33 23 41
Not-
STOP
Halt/
E-
S11 K12 X2 X1/
S22
PE
START
Aus/
Off
Not-
STOP
Halt/
E-
S11 S12 X2 X1/K12
S22
PE
START
Not-
STOP
Halt/
E-
S ext.
ext. U
S11 S12 X2 X1/K12
S22
ext. K2
K1 ext.
PE 13
14 14
START
K
1
ex
t.
K
2
ex
t.
NORSTAT INC. 300 Roundhill Dr. Rockaway, NJ 07866 Tel: 973-586-2500 Fax: 973-586-1590 www.norstat.com