DoorKing 9220 - Manual (Page 32)

2.6.2 Limit Switch Connector
The limit switch connector is located at the upper left-hand corner of the 4404 circuit board and
provides input to the circuit board from the limit switches.
1. FULL LIMIT
2. SLOW DOWN
3. PARTIAL LIMIT
4. SLOW DOWN
5. FULL LIMIT
6. LIMIT ENABLE
7. LIMIT COMMON
8. LIMIT COMMON
2.6.3 Reversing Device Connector
External entrapment prevention devices are connected here.
1. OPEN PHOTO-BEAM
This input is only active when the gate is in the opening cycle. An open photo-beam input
during the opening cycle will cause the gate to stop. The gate will remain stopped until
the photo-beam input is cleared, at which time the gate will resume the open cycle.
2. CLOSE PHOTO-BEAM
This input is only active when the gate is in the closing cycle. A close photo-beam input
during the closing cycle will cause the gate to stop. The gate will remain stopped until the
photo-beam input is cleared, at which time the gate will resume the close cycle.
3. OPEN EDGE
This input is only active when the gate is in the opening cycle. An open edge input during
the opening cycle will cause the gate to stop and then reverse.
If the gate reaches the full closed position, the gate will remain closed, ignore any
maintained inputs and enter a soft shutdown condition. NOTE: If the gate was initially
activated by a time clock with a contact closure across the gate operator open input, this
input will be ignored until another input (open loop, reverse loop. etc.) is received by the
gate operator.
If a close edge sensor is activated prior to the gate reaching the full closed position, the
gate will stop and enter a soft shutdown condition.
4. CLOSE EDGE
This input is only active when the gate is in the closing cycle. A close edge input during
the closing cycle will cause the gate to stop and then reverse.
If the gate reaches the full open position, the timer will automatically close the gate (if it is
turned on). Once the gate starts to close again, if the close edge input is activated a
second time prior to the gate reaching the full closed position, the operator will stop and
reverse and will enter a soft shutdown condition.
If an open edge sensor is activated prior to the gate reaching the full open position, the
gate will stop and enter a soft shutdown condition.
5. COMMON
Common terminal for the secondary entrapment protection device inputs.
6. COMMON
Page 32 9210-065-H-8-08