NORSTAT Safety Relays - Handbuch (Seite 74)

application guide safety relays from riese electronic page 70
Single channel protection door monitoring
If the safety switch S1 is closed and the start
bottom will be pressed and released then the
output contacts 13-14, 23-24, 47-48 and 57-58
will be closed. With automatic start S34-S35
they will closed after closing the safety switches.
After the opening of the safety switches the
contacts 13-14 and 23-24 will open immediately.
47-48 and 57-58 remains close during the
selected time delay.
Before the time delayed contact are not open a
restart is not possible. (except SAFE TR)
Suitable up to category 4; SIL3; PLe reachable
(immediate switching) **
Suitable up to category 4; SIL3; PLe reachable
(time delayed output) **
S22 S10 S11 S21 S12
STAR
T
S33 S35 S34
** You have safety category 4, when using restricted guided switches and lead the wiring
in separate coated cables.
Using SAFE T. in a category 2 system:
The device SAFE T.. makes a complete self-test. You don’t need an external test for the
category 2.
b) SAFE T ON
If the input circuits S11, S12 and S21, S22 are
closed and the start button is released, the
safety circuits 13-14, 23-24 will close. By
pressing the stop button, the safety circuits 13-
14 and 23-24 open. After the set time period has
clapsed, the relay K3 and K4 energise. The
safety gate switch is released and the safety
gate can be opened. By pressing the start button
the relay K3 and K4 are energise, K1 and K2
energise and close the safety circuits 13-14 and
23-24.
S21 S22 A2 48 47
A1 S11 S12 57 58
S10 S33
31
S35 S34
32
13 14
23 24
SAFE T ON
START
[
SK
ÜK
SK = Sicherheitskreis
ÜK = Überwachungskreis
L+
Stop
NORSTAT INC. 300 Roundhill Dr. Rockaway, NJ 07866 Tel: 973-586-2500 Fax: 973-586-1590 www.norstat.com