Pilz PNOZ s9 - Page 27

PNOZ s9
Operating Manual PNOZ s9
21401-EN-10
27
Cycles x 1000
Switching current (A)
Fig.: Service life graphs at 110 V DC
Example
} Inductive load: 0.2 A
} Utilisation category: AC15
} Contact service life: 2 000 000 cycles
Provided the application to be implemented requires fewer than 2 000 000 cycles, the PFH
value (see
Technical details [ 20]) can be used in the calculation.
To increase the service life, sufficient spark suppression must be provided on all output
contacts. With capacitive loads, any power surges that occur must be noted. With DC con-
tactors, use flywheel diodes for spark suppression.