PZA
Operating Manual PZA
18219-EN-07
7
Unit features
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Positive-guided relay outputs:
–
1 safety contact (N/O), delay-on energisation
–
2 auxiliary contacts (N/C), delay-on energisation
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LED display for:
–
Supply voltage
–
Switch state safety output
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12 time values, 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.
Block diagram/terminal configuration
Types: AC
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U
B
: 24 V AC; Order no. 774020, 774031
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U
B
: 110 - 120 VAC; Order no. 774023, 774035
}
U
B
: 230 V AC; Order no. 774026, 774038, 774040
*Insulation between the non-marked area and the relay contacts: Basic insulation (over-
voltage category III), Protective separation (overvoltage category II)
