NORSTAT Safety Relays - Handbuch (Seite 69)

application guide safety relays from riese electronic page 65
c) SAFE 2. 2
(without start control, the SAFE 2.2 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 1Ω.
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 4; SIL3; PLe 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
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