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22 of 53 Doc 6001242 (01-20273) Rev C
10. Shadow Loop
1. Ensure the gate is fully closed (the close limit switch and Maglock LED’s will be ON).
2. Park a car, while it is running, on the Shadow Loop but clear of the Interrupt Loop.
3. Activate an open command and verify that the gate does not open
CAUTION: If the gate begins to open, move the car immediately.
4. Remove the car from the Shadow Loop and verify that an open command opens the gate.
NOTE: In a Bi-Parting Master/Slave system, BOTH gates must be at either the fully open or
fully closed limit for the Shadow loop input to be effective.
11. Interrupt Bar
While the gate is opening , push on the Interrupt Bar. The gate should stop.
12. Maglock
Verify that the maglock activates when the gate is fully closed.
13. Automatic Gate Closure
1. To automatically close a fully open gate after power is restored, on switch S1, set TIMER to
ON.
2. Open the gate fully, then cycle the unit power switch to verify Automatic Gate Closure
operation.
14. Power Fail Option
3. Verify that switch S3 (Power Fail Open Direction switch) is set to the desired position
(Figure 4).
4. Record switch S3 setting in the space provided in the Maintenance Section.
It is essential that maintenance personnel know what the gate will do when power is
turned off during maintenance.