Safety Features; Block Diagram/Terminal Configuration; Function Description - Pilz PNOZ s1 Operating Manual

PNOZ s1

Safety features

The relay meets the following safety requirements:
The circuit is redundant with built-in self-monitoring.
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The safety function remains effective in the case of a component failure.
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The correct opening and closing of the safety function relays is tested automatically in
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each on-off cycle.
The unit has an electronic fuse.
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Block diagram/terminal configuration

A1 A2
=
=
Power
Centre: Front view with cover, right: Front view without cover

Function description

Single-channel operation: no redundancy in the input circuit, earth faults in the reset
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and input circuit are detected.
Automatic start: Unit is active once the input circuit has been closed.
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Manual reset: Unit is active once the input circuit is closed and then the reset circuit is
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closed.
Increase in the number of available instantaneous safety contacts by connecting con-
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tact expander modules or external contactors/relays;
A connector can be used to connect 1 PNOZsigma contact expander module.
Operating Manual PNOZ s1
21393-EN-07
13 23
Input
K1
K2
Reset/
Start
Y32
S34 14 24
4