NORSTAT Safety Relays - Handbuch (Seite 25)

application guide safety relays from riese electronic page 24
Two hand control application SAFE Z.2
Two hand control relay SAFE Z.2 according BG, section iron and metal III ZH 1/456 (02.78)
and DIN EN 574 (02.97) for type 1-3c. The two switches have to be connected as shown. The
machine control has to be connected to safety outputs 13-14 and 23-24. The terminal 31-32 (n.c.
contact) is not a safety output. An emergency stop button or safety gate switches can be
connected in series between the normally open safety outputs.
Impulse plan of two hand control relay type III (III a, III b or III c)
13-14
23-24
S2
on
power
off
S1 0,5s
<-->
0,5s
<-->
0,5s
<-->
0,5s
<-->
There must be installed an auxiliary voltage at the terminals A1 and A2 in order to operate the device.
Then power LED starts illuminating.
By pressing the button S1 simultaneously to S2 the safety outputs 13-14 and 23-24 will switch. This causes
an machine connected to the safety outputs gets able to start. Attention: The simultaneousness of the two
hand control button S1 and S2 has to be smaller 0,5 sec.
If one or both buttons released, the outputs 13-14 and 23-24 will open immediately. Only after releasing S1
and S2 a new cycles can be started. If the simultaneous time will be bigger than 0,5 sec the outputs will not
be released. The outputs 13-14 and 23-24 stay open. The machine cannot be started.
It is possible to connect machine-release-circuits at the terminals S21 and Y2. The contact - extension with
external contactors must be following through two outputs and two contactors how for safety category 4.
SAFE Z.2
A1 S11 A2
+24V 0V
S21
S1
S12 S22
S2
Y1 Y2
Kext
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