The ENA3 is an electronic monitoring system that is integrated into the lift control system's safety circuit. It has two magnetic switches that are fitted to the top/bottom of the lift cage and move with it, and two magnetic tape strips respectively on every floor with which the door zones are identified and monitored. If the lift cage moves unintentionally, the drop-prevention device (A3-actuator) is activated and the lift is stopped.
The electronic monitoring system de-energises the magnetic coil of the drop-prevention device. This causes the rocker to block the OG if the lift continues to move and breaks the safety circuit. Once activated, the device keeps the safety circuit open and indicates the error type through a flashing LED and an beeping sound.
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