Installation, Wiring – Pilz PNOZ c1 24VDC 3n/o 1n/c User Manual
Page 7
PNOZ c1
Operating Manual PNOZ c1
22197EN02
7
Installation
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The unit 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.
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Ensure the unit is mounted securely on a vertical DIN rail (35 mm) by using a fixing ele
ment (e.g. retaining bracket or an end angle).
Wiring
Please note:
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Information given in the "Technical details" must be followed.
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Outputs 1314, 2324, 3334 are safety contacts; output 4142 is an auxiliary contact
(e.g. for display).
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Auxiliary contact 4142 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
technical details).
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Calculation of the max. cable runs l
max
in the input circuit:
R
lmax
R
l
/ km
I
max
=
R
lmax
= max. overall cable resistance (see Technical details)
R
l
/ km = cable resistance/km
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Use copper wire with a temperature stability of 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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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.
Important for detection of shorts across contacts:
As this function for detecting shorts across contacts is not failsafe, it is tested by Pilz during
the final control check. If there is a danger of exceeding the cable runs, we recommend the
following test after the installation of the device:
1. Unit ready for operation (output contacts closed)
2. Short circuit the test terminals S12, S22 for detecting shorts across the inputs.
3. The unit's fuse must be triggered and the output contacts must open. Cable lengths in
the scale of the maximum length can delay the fuse triggering for up to 2 minutes.
4. Reset the fuse: remove the short circuit and switch off the supply voltage for approx. 1
minute.