Pilz PST 4 - Wiring

PST 4
Operating Manual PST 4
18436-EN-06
10
Wiring
Please note:
} Information given in the "Technical details [ 15]" must be followed.
} Outputs 13-14, 23-24, 33-34, 43-44, 53-54, 63-64 are safety contacts; outputs 71-72,
81-82, 91-92, 01-02 are auxiliary contacts (e.g. for display).
} Do not use auxiliary contacts 71-72, 81-82, 91-92, 01-02 for safety circuits!
} Do not connect undesignated terminals.
} To prevent contact welding, a fuse should be connected before the output contacts (see
Technical details [ 15]).
} 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 Technical details [ 15])
R
l
/km = cable resistance/km
} Use copper wire that can withstand 60/75°C.
} Sufficient fuse protection must be provided on all output contacts with capacitive and in-
ductive loads.
} Do not switch low currents using contacts that have been used previously with high cur-
rents.
} On 24 VDC devices:
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.
} Ensure the wiring and EMC requirements of EN 60204-1 are met.