NORSTAT Safety Relays - Handbuch (Seite 18)

application guide safety relays from riese electronic page 18
41 33
START
S34 S33 S22 S21 S12 S11 23 13
Not-
STOP
E-
Halt/
A2(-) A1(+)
Ub
Emergency stop applications SAFE 4
Single-channel emergency stop (without
opposite between channels).
Pressing the START-button, the unit will be
activated. Contacts 13-14 and close.
Pressing the emergency stop will reset the
contacts.
up to category 4*; SIL3; PLd reachable
Dual-channel emergency stop
(with opposite between channels)
For this application the terminal wiring S11, S12,
S21 and S22 must be used. With the START-
button the device will be activated The contacts
13-14, 23-24 and 33-34 are closed. Pressing the
emergency stop initiates a stop and outputs
open immediately.
up to category 4*; SIL3; PLd reachable
Dual-channel emergency stop with external
contact extension (2 contactors), contact
monitoring and opposite polarity between
channels.
This application uses two external contactors
with positive guidance. One normally closed
contact of each external contactors must be
connected in series to the START-button to the
terminals S33 and S34. Through the switch S
ext. the external contactors can be operated or
turned off at any time if the SAFE 4... is
activated.
up to category 4*; SIL3; PLd reachable
41 33
START
S34 S33 A2(-) A1(+)
24V AC/DC
S22 S21 S12 S11 23 13
Not-
STOP
E-
Halt/
Not-
STOP
Halt/
E-
S ext.
ext. U
24V AC/DC
START
K
1
ex
t.
K
2
ex
t.
S33 S34 A1(+) S11 A2(-) S21 S22 23
ext. K2
24
K1 ext.
S12 13
14 14
33 41
NORSTAT INC. 300 Roundhill Dr. Rockaway, NJ 07866 Tel: 973-586-2500 Fax: 973-586-1590 www.norstat.com