Installation
2-12 Manual # 42-02-2P24
Brake Connection
Motion 4000 controllers may be ordered with or without a brake control module. The module
allows more precise control of brake lift and drop rates. The brake module must be calibrated
before it will pick the brake. Please refer to “Calibration (CAN Only)” on page 5-85.
Standard Brake
1. Refer to the brake circuit drawing in your job prints to verify the configuration of the
braking circuit. (Brake control and brake adjustment resistors vary from job to job.)
• Familiarize yourself with the brake pick, hold, and drop time adjustments.
2. Measure the resistance through the brake coil on the lift machine.
3. Initially, adjust resistance across the Brake Drop Time resistor(s) to three times the
measured brake coil resistance.
This resistance determines brake drop time. Too little resistance causes the brake to remain
picked for a longer time, perhaps allowing rollback before stopping the car. Three times brake
coil resistance is usually a good starting point.
4. Connect the wires from the controller to the brake as shown in the job prints. Remember
that brake wires must not be routed in the same conduit with motor power or velocity
encoder wires.
Brake Module
If the job uses one machine brake as the service brake and the second machine brake as an
emergency brake, a brake module may be necessary for each depending upon the jurisdiction of
the installation site.
• Connect the wires from the controller to the brake as shown in the job prints. Remember
that brake wires must not be routed in the same conduit with motor power or velocity
encoder wires.
Brake modules must be calibrated to the brake that they will be controlling. Please
refer to “Calibration (CAN Only)” on page 5-87. Both calibration and adjustment
are described in the referenced area of the manual.
Brake Mechanics
Check basic brake characteristics at this time:
• Ensure that the brake mechanism is clean and in good condition.
• Check that the brake lining makes good contact with the machine braking surface (at least
95% of the pad must be in contact with the braking surface).
• Check that the adjustment of the brake solenoid is not preventing the brake from fully
applying when it is not energized.
• Check to see that the spring adjustments are equal and are torqued to the manufacturer
recommended brake torque settings.
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