Datasheet

Relays for functional safety
Safety relays PNOZsigma
PNOZ s1
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]
2016-09
549
Block diagram/terminal configuration
Interface
expansion
module
Fig.: Centre: Front view with cover, right: Front view without cover
*Insulation between the non-marked area and the relay contacts: Basic insulation (over-
voltage category III), Protective separation (overvoltage category II)
Function description
} Single-channel operation: No redundancy in the input circuit, earth faults in the start
and input circuit are detected.
} Automatic start: Unit is active once the input circuit has been closed.
} Manual start: Unit is active once the input circuit and the start circuit are closed.
} Increase in the number of available instantaneous safety contacts by connecting con-
tact expander modules or external contactors/relays;
A connector can be used to connect 1 PNOZsigma contact expander module.