ARKEL Elektrik Elektronik Ltd. Şti. www.arkel.com.tr
08.2012
ADrive
23
13.2.1.1. Recommended connection of enable signal (EN) for synchronous drive
Adrive motor driver checks the activation-releasing of the main contactors (KPA, KPB) with
ENABLE input. The main contactors must be activated before the inverter starts driving. Similarly,
before the main contactors are released, device must stop driving. However, when the safety circuit is
interrupted during motor drive, due to the releasing of the main contactors will take a certain time, the
ENABLE signal interruption will be delayed and the motor circuit will be opened by the main
contactors while the device is still continue to driving. This situation may cause excessive current
draw from the device. Driver will give IPM error in these cases.
Therefore, to avoid this situation that shorten the life-time of the device, it is recommended to switch
the drive enable signal (EN) also from a NO contact of an auxiliary relay. The auxiliary relay has to
be connected parallel to the travel contactors. Auxiliary relay will release more quickly than the main
contactors and the drive will be cut off without waiting for the release of the main contactors.
It is appropriate to use auxiliary relay which has less than 25ms contact release time.
Supply voltage of
main contactors
ADrive
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