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With the special retrofit kits, both ZETADYN 2 and ZETADYN 3C frequency inverters can be replaced with a ZAdyn4C in just a few steps. To keep wiring outlay to a minimum, the retrofit kits feature the same number of connections as the old unit. No new control cables are required for the replacement process. The retrofit kit contains the appropriate miniature contactors for activating contactor-free operation of the ZAdyn4C. The retrofit kit also includes outputs for existing monitoring of the motor contactors by the elevator control system. Depending on the voltage in the safety circuit, there are 110 VAC or 220 VAC variants of the retrofit kits.
