7
Figure 1
2.3.2 BKSIGNAL
The BKSIGNAL input is the signal from the lift controller to initiate the brake lift sequence.
This input only requires a voltage free contact.
2.3.3 AC SUPPLY
The AC SUPPLY terminal is used for the AC voltage @ 50Hz for the brake board.
This voltage is regulated by the brake board and output from terminal VAC BRAKE to control
the brake
Important Note:
This voltage cannot exceed 240Vac and must be @ 50Hz
2.3.4 VAC BRAKE
The VAC BRAKE terminal is the AC output from the Brake Board to the Brake coil.
As a DC voltage is required for most brake coils, use the supplied rectifier on this output.
2.3.5 NO NC C
The NO NC C relay contacts are used to signal to the lift controller that a fault has occurred
with the brake board, inhibiting any further lift operation. See example Section 4, Fig. 6 & 7,
where the relay C & NO contacts are used for the controller PRV (prove) input.
When the brake board is functioning normally, the fault relay will be energized.
When any of the faults listed below are detected the fault relay will drop out:
Loss of AC SUPPLY. “Loss of AC!” will be displayed on the LCD. (No AC voltage at
AC SUPPLY, Fig. 2). Brake board will remain inoperative until AC SUPPLY restored.
