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screwdriver . The resistance may be increased or decreased by rotating clockwise or
counterclockwise. By turning the overload variable resistors, you can adjust how much force
it will take to cause the gate to stop and auto reverse when closing or stop if opening.
Note: (1) With each press of the button the gate will open, stop, close or stop. If the direction
of the gate movement is wrong, or if the auto reverse direction is wrong, exchange the wires
‘D’ and ‘D’, ‘ OP’ and ‘C L’ . (2) When the gate meets the correct place in both open and closed
positions, it will auto-stop and switch off automatically; otherwise, exchange the two wires
‘OP’ and ‘C L’ .
WARNING:
Do not attempt to tune the gate by placing your hand, arm or other body part in
the path of the gate, as serious injury could result. Damage to the gate opener motors may
also occur by placing a heavy immovable object in the path during the testing phase. If the
setting is still too high, place a light object in the path (e.g., a chair or trash can) which can be
pushed out of the way without causing damage to gate motors. Note: This auto reverse
function should be regularly inspected and adjusted if necessary. Once the tuning is complete
you may replace the cover.
External Interfaces
Keypad/ Button Switch
The SKC -500DC is equipped with an interface for an external switch or keypad. The interface
type is a NO (Normally Open) momentary switch to ground. To activate the opener, the
keypad or other device must short the 0 and DI terminal momentarily on Box JX2. This type of
switch is very common. To install, attach one lead of your keypad to the D I terminal and the
other to the 0 terminal. The keypad will function in single channel mode just like the RF
remote. If the gate is closed, then activating the keypad will open the gate, if the gate is open,
then activating the keypad will close the gate; if the gate is moving, then activating the keypad
will stop the gate. If your keypad requires DC power, then you can use the 12 or 5 terminals
and the 0 terminal for ground as required by your device. See Figure 4 for a diagram of
external interface connections. Consult your manufacturer’s documentation for details. The
keypad device can be obtained through your dealer. To find a dealer, go to
www.gatekeeperltd.com/dealers
Loop detector
A magnetic loop detector detects vehicles that are within proximity to the gate. A magnetic
loop detector can be used to o pen the gate when a car pulls up either from the inside or the
outside depending on which side of the gate you install it. A magnetic loop is usually buried
under the ground, and the wires run to the gate opener control board. Magnetic loops usually
require DC power + and – DC terminals, and provide a normally open momentary switch
interface to the control board and its ground or common interface. Wire the magnetic loop’s
DC + wire to the 12 terminal on block JX3, wire the power common or ground to 0. W ire the
magnetic loop’s normally open trigger wire to terminal BI and the normally open ground or
common to 0 both on block JX3. The terminal BI is a “free open” terminal. This means that it
will only open the gate, if the gate is already opening, it will have no effect, if the gate is
closing, it will override and open the gate, but triggering the terminal BI will never close the
gate. Consult your manufacturer’s documentation for details. See Figure 4 for a diagram of
external interface connections. The Loop Detector device can be obtained through your
dealer. To find a dealer, go to www.gatekeeperltd.com/dealers