Pilz PNOZ s4 User Manual

PNOZ s4
Operating Manual PNOZ s4
21396-EN-21
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For your safety
The unit meets all the necessary conditions for safe operation. However, please note the
following:
} Note for overvoltage category III: If voltages higher than low voltage (>50 VAC or >120
VDC) are present on the unit, connected control elements and sensors must have a rated
insulation voltage of at least 250 V.
Unit features
} Positive-guided relay outputs:
– 3 safety contacts (N/O), instantaneous
– 1 auxiliary contact (N/C), instantaneous
} 1 semiconductor output
} Connection options for:
– E-STOP pushbuttons
– Safety gate limit switches
– Start buttons
– Light grids and safety switches with detection of shorts across contacts
} A connector can be used to connect 1 PNOZsigma contact expansion module
} Operating modes can be set via rotary switch
} LED indicator for:
– Supply voltage
– Input status, channel1
– Input status, channel2
– Switch status of the safety contacts
– Start circuit
– Errors
} Plug-in connection terminals (either spring-loaded terminal or screw terminal)
} See order reference for unit types
Safety features
The safety relay meets the following safety requirements:
} The circuit is redundant with built-in self-monitoring.
} The safety function remains effective in the case of a component failure.
} The correct opening and closing of the safety function relays is tested automatically in
each on-off cycle.

Pilz PNOZ s4 Specifications

General

Safety category	4
Performance level	e
SIL CL	3
Supply voltage	24V DC
Number of safety contacts	3
Number of auxiliary contacts	1
Stop category	0 / 1
Width	45 mm
Depth	121 mm
Rated operational current Ie	6 A
Standards	EN ISO 13849-1, EN 62061