Datasheet

Relays for functional safety
Safety relays PNOZsigma
PNOZ s30
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]
2016-09
875
Categories
Safety level
The maximum achievable safety level depends on the encoder, the wiring and the operat-
ing mode of the PNOZ s30.
Information on the safety-related characteristic data for the subsystems Sensor and PNOZ
s30
Example:
Sensor subsystem PNOZ s30 subsystem
Category MTTFd DC Operating mode PFH [1/h]
2 Manufac-
turer-spe-
cific
90 % Monitoring
1 encoder
3,28E-08
The values for Category and DC can be set for the sensor subsystem, bearing in mind the
restrictions stated in the respective chapter. The MTTFd value must be stated by the device
manufacturer.
Assuming that all faults are dangerous, MTTF = MTTFd can be set.
The characteristic value MTTF is a property of the sensor, which may only be stated by the
manufacturer.
Forced dynamisation:
When monitoring sensors with square output signals (TTL, HTL) or safe sensors, the axis
must be moved within 8 hours so that the signal changes on all the connected tracks.
Key:
SRP/CS = Safety-related part of a control system (EN 13849-1, Tab. 2)
Safety functions
The following safe monitoring functions are available:
} Standstill
} Position
} Speed
} Speed range
} Direction
} Monitoring for broken shearpins
The safety functions of the PNOZ s30 are monitoring functions, whereby a safe output sig-
nal is used to show if defined limit values are exceeded.
The reaction function that takes place (e.g. shutting down the drive, activating a mechanical
brake) when exceeded limit values are detected during the normal operation of the safety
function must be defined and implemented by the machine/plant developer and does not
form part of the PNOZ s30.