The Solenoid Driver SD-01 is a simple phase angle voltage regulator specially designed for elevator and escalator applications. It is used mainly as a brake or retiring cam supply regulator when different peak and hold voltages are required.
Two on board push buttons are used to set the holding voltage. Control and power supply fuses fitted on board as well as the output bridge rectifier. Three on board LED diodes are indicating control power OK, peak period, hold period and no brake supply.