DC controlled contactors series C, V..F and VH.. employ special DUO-coils, which is switched
during the sealing of the contactor using an integral time-delayed NC contact, see the appropriate wiring
diagram. This wiring does not require the series resistors. The wires supplied with the contactor must
not be removed!
Contactors C9.0040, C23.0040, C 9.0022 and C23.0022 employ the auxiliary contact unit PK21T, but no balast
resistor. Wiring of the control circuit remains the same as for the rest of contactors series C with
DC D control.
The control voltage is to be applied directly to the coil terminals.
Wiring diagram of older DC controlled contactors series VH and VD, using an on/off switch and resistor:
Series resistor R is supplied with the contactor.
Contactors C50.11 and C32.11, used for elevators, are supplied with coils of less power consumption, labelled
48/10 Vss. This feature allows using these contactors directly without a series resistor and
The module insures a reliable pull-in at the voltage 48 Vss and the voltage 10 Vss,
supplied after a delay of approx. 90 ms, is sufficient for a safe hold-in of the contactor.