Datasheet

Relays for functional safety
Safety relays PNOZsigma
PNOZ s4.1
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]
2016-09
618
Installation
Install base unit without contact expansion module:
} Ensure that the plug terminator is inserted at the side of the unit.
Connect base unit and PNOZsigma contact expansion module:
} Remove the plug terminator at the side of the base unit and at the contact expansion
module.
} Connect the base unit and the contact expansion module to the supplied connector be-
fore mounting the units to the DIN rail.
Installation in control cabinet
} The safety relay should be installed in a control cabinet with a protection type of at least
IP54.
} Use the notch on the rear of the unit to attach it to a DIN rail (35mm).
} When installed vertically: Secure the unit by using a fixing element (e.g. retaining
bracket or end angle).
} Push the device upwards or downwards before lifting it from the DIN rail.
Wiring
Please note:
} Information given in the "Technical details [ 622]" must be followed.
} Outputs 13-14, 23-24, 33-34 are safety contacts; output 41-42 is an auxiliary contact
(e.g. for display).
} Auxiliary contact 41-42and semiconductor output Y32 should not be used for safety
circuits!
} To prevent contact welding, a fuse should be connected before the output contacts (see
Technical details [ 622]).
} 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 [ 622])
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.
} With U
B
48 – 240 VAC/DC: Connect S21 to the functional earth.
} Ensure the wiring and EMC requirements of IEC 60204-1 are met.
} 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.