Datasheet

Relays for functional safety
Safety relays PNOZsigma
PNOZ s20
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]
2016-09
796
Wiring
Please note:
} Information given in the "Technical details [ 797]" must be followed.
} Outputs 14-24 are safety outputs; semiconductor output Y32 is an auxiliary output (e.g.
for display).
} 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.
} Ensure the wiring and EMC requirements of IEC 60204-1 are met.
} 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
Supply voltage/input circuit/
feedback loop AC DC
Contact expansion module PNOZ
s20
PNOZs
base unit or
expansion
module
PNOZ s20
expansion
module
A1
L+
F1
A2 (B2)
L-
Connect the N/C contacts from external contactors to the feedback loop on the base unit.
Safety output Single-channel operation Dual-channel operation
14 (24)
K2
K1
L-
14
K2
K1
24
L-
L-
With dual-channel operation, always use both safety outputs for a safety function.