PNOZ s3
Operating Manual PNOZ s3
21395-EN-12
11
Installation in control cabinet
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The safety relay should be installed in a control cabinet with a protection type of at least
IP54.
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Use the notch on the rear of the unit to attach it to a DIN rail (35 mm).
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When installed vertically: Secure the unit by using a fixing element (e.g. retaining
bracket or end angle).
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Push the device upwards or downwards before lifting it from the DIN rail.
Wiring
Please note:
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Information given in the "
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Outputs 13-14 and 23-24 are safety contacts, the semiconductor output Y32 is an auxil-
iary output (e.g. for display).
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Semiconductor output Y32 should
not
be used for safety circuits!
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To prevent contact welding, a fuse should be connected before the output contacts (see
).
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Calculation of the max. cable length l
max
in the input circuit:
R
lmax
R
l
/ km
I
max
=
R
lmax
= max. overall cable resistance (see
R
l
/ km = cable resistance/km
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Use copper wire that can withstand 60/75 °C.
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Sufficient fuse protection must be provided on all output contacts with capacitive and in-
ductive loads.
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When connecting magnetically operated, reed proximity switches, ensure that the max.
peak inrush current (on the input circuit) does not overload the proximity switch.
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Ensure the wiring and EMC requirements of EN 60204-1 are met.
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The power supply must comply with the regulations for extra low voltages with protect-
ive electrical separation (SELV, PELV) in accordance with VDE 0100, Part 410.
Preparing for operation
Operating modes
The operating mode is set via the rotary switch on the unit. You can do this by opening the
cover on the front of the unit.
NOTICE
Do not adjust the rotary switch during operation, otherwise an error mes-
sage will appear, the safety contacts will open and the unit will not be ready
for operation until the supply voltage has been switched off and then on
again.
