Supplementary data
Operating Manual PNOZ m EF 4DI4DOR
1002702-EN-08
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Number of cycles x 1000
Switching current (A)
Fig.: Service life graphs at 110 VDC
Example
}
Inductive load: 0.2 A
}
Utilisation category: AC15
}
Contact service life: 1 000 000 cycles
Provided the application to be implemented requires fewer than 1 000 000 cycles, the PFH
) can be used in the calculation.
To increase the service life, sufficient spark suppression must be provided on all relay con-
tacts. With capacitive loads, any power surges that occur must be noted. With DC contact-
ors, use flywheel diodes for spark suppression.
We recommend you use semiconductor outputs to switch 24 VDC loads.
