PZW
Operating Manual PZW
19157-EN-07
7
For your safety
The unit meets all the necessary conditions for safe operation. However, please note the
following:
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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
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Positive-guided relay outputs:
–
1 safety contact (N/O), pulsing
–
2 auxiliary contacts (N/C), pulsing
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LED display for:
–
Supply voltage
–
Switch state safety output
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12 pulse times, set via rotary switch
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Feedback loop for monitoring external contactors
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See order reference for unit types
Safety features
The relay meets the following safety requirements:
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The circuit is internally redundant with built-in self-monitoring.
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The safety device remains effective in the case of a component failure.
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The correct opening and closing of the safety device relays is tested automatically in
each on-off cycle.
