NORSTAT Safety Relays - Handbuch (Seite 68)

application guide safety relays from riese electronic page 65
Combination examples:
Logical AND-combination of two SAFE C devices, whereby
A and B can be any devices of the Safe C family
After opening the e-stop circuits of the device A, the contactors
K1/K2 de-energise. Because the safety outputs of device A
have now a 0V-potial and the device B is configured for the
AND-combination (through the open circuit S32), the contactors
K3/K4 will be de-energised over the S33 terminal (AND
combination) too. If only the safety gate will be opened which is
connected to the device
B, the contactors K3/K4 will be de-
energised only. The contactors K1/K2 remains in energised
condition. The device
A de-energises all it following devices.
up to category 4; SIL3; PLe reachable
b) SAFE M
(without start control, the SAFE M car only used for safety mats and safety contact edges)
It must be quaranteed that the safety mat or safety contact edge – during load with a standard weight –
does not have a resistance more largely than 200Ω. The connductor resistance of the same contacts plane
should not be greater
than 10 Ω.
Dual-channel application for four-wire safety-
mats with opposite polarity between channels
(with potential free contacts)
In this application the terminals S33 and S34 are
bridged. So this activation of the device works
automatically. Contacts 13-14, 23-24 close after
power is on or after steps off the safety mat.
When the safety mat is stepped on, the contacts
fall back into their normal position without delay.
Suitable up to category 3; SIL2; PLd reachable
Dual-channel application for t wo-wire safety-
mats with opposite polarity between channels
(with potential free contacts)
In this application two connections per channel
are each connected to one of the terminals of the
safety-mat. Terminals S21/S22 and S12/S11 are
connected.
The function is like the application with four wire
safety mats.
Suitable up to category 1; SIL1; PLc reachable
24V AC/DC
S33 S34 A1(+) S11 S22 A2(-) S21 23 S12 13
A1(+) S33 S34 A2(-) S21
24V AC/DC
S22 S11 13 S12 23
S32
S33 24
S11
K1 K2 K3 K4
14
A B
24
14
safety
input
safety
input
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