Gatekeeper SKC-500DC User manual

SKC-500DC SLIDING GATE OPENER
OWNER’S MANUAL

OUTLINE
1. Safety Precautions
2. Features
3. Specifications
4. Necessary Tools
5. Site Preparation
6. Mechanical Installation
7. Electrical Installation
8. Operation
9. Trouble Shooting
10. Warranty
Gatekeeper Ltd.
P.O. Box 752
Laceys Spring, AL 35754
http://www.gatekeeperltd.com
©2005-2007 GatekeeperLtd All Rights Reserved

IMPORTANT SAFTEY INFORMATION
Installing the SKC-500DC Gate Opener requires installation ofstandard110V
electrical wiring. This work should only be performed by a trained technician.
Miswiring could cause personal injury or DEATH. To prevent the risk of
electrocution, be sure to turn off all power to the SKC-500DC until installation
is complete.
•Fingers, hands, and loose clothing may be dragged into chain sprockets, please keep
hands, fingers and loose clothing away from chain and rotating sprockets.
•TheGate may move at any time, ensure all persons are clear of thegate when It is
moving to avoid the risk of injury.Do not touch the gate while it is in operation.Do not
attempt to go through the gate while it is still in motion. This operator is intended for
vehicular use only.
•Do not allow children or pets near your gate. Keep the remote controls away from
children. Place controls where they cannot be accessed by reaching through the
gate.
•To Avoid electric shock, unplug unitbefore openingcase.
•Make sure the battery inside the operator is charged fully before using.
•Beforeinstallation, the clutch should be unlocked.
•Theauto-reverse function must be checked during installation to ensure that thegate
can auto -reverse in the event of obstruction, and it should be inspected regularly.
•The automatic gateopener must be grounded.
•Install the gate opener on the inside of the property, DO NOT install it on the outside
of the property where the public has access to it!
•Additional safety equipment such as photoelectric sensors, safety edges, roller
guards and warning signs must be installed to prevent injury.
•In the event of power failure, an emergency release key allows you to operate the
gate manually.
•Please erase and reset the code after installing the opener.
•The gate opener should be installed by a qualified technician; otherwise, serious
personal injury or property damage may occur.
For service, call an experienced technician. Do not in any way modify the components
of the automated system; otherwise serious personal injury or property damage may

occur. We do not accept responsibility for damage or injury resulting from installing of
this operator.

Class I: A vehicular gate opener (orsystem)intended solely for use in a single family home,
or an associated garage or parking area.
ADDITIONAL FEATURES
•Keypad / single button interface.
•Infrared safety beam interface.
•Supports up to 25 RF remotes, 2 included.
•User programmable and user erasable remote codes.
•RF hopping code technology prevents thieves from guessing your remote code.
•Auto-close feature is available for this opener.
•For your safety, the SKC-500DC will stopand reverse if is encountersan obstruction on
closing and stop when it encounters an obstruction on opening, as required by UL-325
safety standards.
•Manual key release design for emergency purposes.
•Self-locking at any position.
•Battery Backup for loss of power conditions
•Supports Keypad interface and Magnetic Loop Detectors simultaneously
Specifications
Transformer Output 16V AC/ 30 VA
Motor Input 12V DC 100W
Output Torque Max 7NM
OutputSpeed 40RPM
Limit Switch NC (Normally Closed)
Remote Control Operating Range >30M
Remote Control Frequency 433.92Mhz
Noise <58db
Environmental temperature -10°C -+40°C
Battery 12V 7AH
MCU logic voltage DC5V
Relay coil voltage DC12V
Net weight 21 Kg
Emergency release key in case ofpower failure

Necessary Tools and Equipment
The following tools may be necessary to installthe SKC-500DC Gate opener. You will need
standard and Philipsscrew drivers, an electric drill, wire cutters and a wire stripper, a socket
set, and possibly access to a welder.
Site Preparation
Before you beginthe opener installation,the gate should be mounted and moving freely,
there should be little resistance inthe movement ofthe gate. The gate and post must be
suitable for being automated. Check that the structureis sufficientlystrong and rigid, and that
its dimensions and weights conform to those listed in the specifications table of this document.
Make sure that the gate is plumb and level. The fence posts must be mounted in concrete.
TheSKC-500DC is powered by 110V/60Hz AC power;therefore,if you have not already done
so, wire a waterproof outlet near the gate following proper safety standards for your area. If
you are not experienced with this type of wiring or if your area requires it, hire a professional
electrician to perform this as well as wire in the SKC-500DC in the electrical section. The
SKC-500DC requires at least a 10A service. Make sure your electrician takes into accountthe
voltage drop involved in running many feet of wire to your installation location. If an
insufficient gauge of wire is used, there will be insufficient power at the site to operatethe
opener. If you plan to use solar panels to power your gate, verify that you have sufficient
solar power to charge the battery and provide power for the number of openings and closings
you plan to need. Different areas of the planet receive varying amounts of sunlight, and that
amount varies on the time of the year. Make sure you account for all this in any solar
installation. If insufficient power is available, the opener battery can be permanently damaged
and this is not covered under the warranty.
Parts List
(1) Sliding gate operator
(1)Operator Base
(1) Magnetic limitswitch
(2) Remote control
(2) Master Links
(2) 10 ft. Chain
(2)Chain Bolts
(2) ChainBrackets
(4) “U” Bolts for 2_ (51mm) for square & round gate frame
(4) 2 ¾_ (70mm) #48 Bolts for mounting operator to the base and washers
(4) 2 ½_ (64mm) Bolts for mounting Magnet brackets and washers
(4) 3 ¾_Anchor bolts, Anchors, Washers and Nuts (In the same bag with Manual release key)
(4) 5/8_ (15mm) Socket Head Cap screws for mounting chain box
(2) Manual release key
(2) Magnet brackets
(2) Magnets
(1) 1m BVR 0.7mm2antenna
(1) Owner’smanual

Mechanical Installation
Installation and Adjustment
TheSKC-500DC Chain-driven Gate Opener operates by forcing a straight piece of chain
through its chain box. This length of chain is extended between two chain brackets located at
opposite ends of the gate. The entire configuration is shown in the diagramabove.
ConcretePad
The base unit of the gate opener requires a concrete pad in order to maintain proper stability.
Theconcrete pad should be approximately 24” (600mm) x 12” (300mm) x 18” (460mm) deep
in order to provide for adequate operation. The pad should be 3” (70mm) above finish grade.
Be sure to locate the pad so that it will not interfere with the gate. In locations where ground
freeze is possible, extend the pad below the frost line.
Once the gate is mounted adequately, electrical power is available, andthe concrete pad is
poured, you are ready to proceed.
Anchors
You can use the anchors that are provided with the opener, 3 ¾ anchor bolts (4), anchors,
washers, and nuts. These anchors must be set into the concrete when it is poured, or you
can use wedge anchors (1/4” x 4”).

Operator Base
Mount the gate opener base to the concrete pad. The distance between the gate and the
base should be no more than 2 ½ “ (64mm). Verify that the opener is leveled properly.
Nut
Anchor
Gate operator
Cable
Operator base
Anchor bolt
Conduit
Chain box
Socket head cap screw
Concrete pad
Chain Box
Make sure the ends of the guide chain are out of the chain holes on both sides of the chain
box. Remove the cover and insert the manual release key and turn counter-clockwise to
disengage the clutch. Remove the elasticband from the shaft and line up the key on the
shaft with the sprocket at the chain box. Insert the sprocket from the chain box into the
operator shaft. Place the operator on top of the base and use (4) 5/8 “ (15mm) socket head
cap screws to mount the chain box in to the base.
Opener
Mount the gate opener to the base using (4) 2 ¾ “ (70mm) #48 bolts and washers. Make sure
there is no more than 1/8” (2mm) of space between the cover and the chain box. Check the
opener and make sure it is lined up with the gate.

Chain Brackets
Use the appropriate bolts to attach the chain bracket to the frame of the gate. If the gate isof
square framestyle, use the square bolts shown.
Spring washer (¦µ8)
Plain washer (¦µ8)
"L" bracket
Square bolt
Nut (M8)
Chain bolt
Master link
Nut (M6)
Spring washer (¦µ6)
Plain washer (¦µ6)
Gate Square frame
If the gate is of round framestyle, use theround bolts shown.
Round bolt
"L" bracket
Plain washer (§¶8)
Spring washer (§¶8)
Nut (M8)
Chain boltMaster link
Nut (M6)
Spring washer (§¶6)
Plain washer (§¶6)
Gate Round frame

Chain
Close the gate and attach a chain bolt to the piece of chain that comes with the chain box
using enclosure master links. Tighten the chain bolt to the bracket with washers and nuts.
Pull the chain through the chain wheel box to the other chain bracket at the opposite end of
the gate. Connect the other end of the chain and the chain bolt, and then tighten the chain
bolt to the chain bracket. Thread up the chain by adjusting the chain bolt. Cut the chain to
length if necessary. Make sure that the chain is perfectly aligned with the chain holes on the
chain box. Tighten the chain by tightening the chain bolts at either end. See illustration
below.
Master link
Chain bolt
Chain
Electrical
Power
The control box should be equipped with a single-phase breaker (10A). Make sure thatthe
power is OFF before making any electrical connections. Removethe cover of the control box,
perform the wiring and replace the cover again. (See Fig.3 and wiring notes for control board)
Connect the supplied transformer to the control board at the AC IN terminal on JX-1 and plug
the transformer into an outlet. Verify that all electrical connections are water proof by
electrical outlets into exterior grade boxes with waterproof covers. Make sure that whenever
an electrical connecter enters or exits a box, it is sealed. If using solar, verify that all
connections are water proof and install solar power terminals into + and–terminals in JX-1.

RF Remote Control
Button 2
Button 1
Button3
Button 4
Fig.2 Remote control
lThe remote control works in a singlechannel mode. It has four buttons. The function of
button 1, button 2, and button3 are thesame. With each press of the remote control
button which has been programmed, thegate will open, stop, close or stop cycle.Button
4 is available toset pedestrian mode.Note: if you cancelled the pedestrian mode, the
function of button 4 is same asthe other three buttons.
lWarning: Notify the users that the gate is never to be operated unless it is in full view.
lAdding extra remote control (learning): Press the ‘LEARN’button on the control
board. Then the ‘LED2’will flash and turn off. Then press the transmitter button on the
remote control which you want to use. The ‘LED2’ will flash again andturnoff. Press the
same button again. The ‘LED2’will continuously flash about 5 seconds at 1/2Hz
frequency. Wait until the ‘LED2’ stops flashing.This indicates that the learning process
iscomplete.
lIf the remote control fails toset, the ‘LED2’will turn off after lighting 1 second. You
should reset as above steps. Up to 25 remote controls may be used. Additional RF
Remote controls can be obtained through your dealer. To find a dealer in, go to
www.gatekeeperltd.com/dealers
lErase remote controls: To erase existing remote controls,press and hold the ‘learn’
button for about 15 seconds until the ‘LED2’turns off.
lVerify open direction: If the gate does not move in the desired direction, then you will
need to reverse the motor operating direction. You can do this by exchanging wires ‘D’
and ‘D’, ‘OP’and‘CL’, then insert the wire connector terminal block.
lSet auto-closefunction (This feature can be selected to make thegate stay open for
some seconds before it automatically closes. The auto-close time can be adjusted to
between 0 and 44 seconds.): Make the first switch of SW (DIP-switch) see Control Board
Schemeto ON position (down), press remote control button (button1, button 2 or button
3) that has been programmed to openthe gate (seeVerify open direction section).
Stop the gate at any position by pressingthe same button, wait for some seconds as
yourrequirements (1~44 sec.), this period of time is regarded as‘auto-close time’. Close
the gate by pressing the same button.Press thebutton again to stop the gate or thegate
will stop atits closed position automatically. After this setup is complete, make thefirst
switch ofSW (DIP-switch) to OFF position (up) immediately. Thus ‘theauto-close
function’has beenset.
lCancel auto-close function: Make the first switch of SW (DIP-switch) to ON position
(down), press remote controlbutton (button 1, button 2 or button 3) that has been
programmed to openthe gate (see Verify open direction section).Stop the gate at any
position by pressingthe same button, wait until the gate close automatically (45 sec.).

Press the same button again to stop the gate or the gate will stop at its closedposition
automatically.After this setup is complete, then remember to makethefirst switch ofSW
(DIP-switch) to OFF position (up) immediately. Thus ‘the auto close function’has been
cancelled.
lSet width / auto-close function of pedestrian mode: Pedestrian mode can be used to
open gate about 0.3~1.5 meters forpeople pass through.
?Set width of pedestrian mode: Make the first switch of SW (DIP-switch) to ON
position (down), press button 4 to open the gate (see Verify open directionsection).
Wait untilthe gate travels the distance as your requirements (the distance range is
0.3m~1.5m or wait for 3~10 sec.), it is regarded as‘thewidth ofpedestrian mode’. Then
press the samebutton to stop the gate, waitfor someseconds (1~44sec.).Close the
gate by pressing the same button. Press the same button again to stopthe gate or the
gate will stop atits closed position automatically. Then make the firstswitchof SW (DIP -
switch) to OFF position (up) immediately. Thus ‘the width ofpedestrian mode’ hasbeen
set.
If you open the gate withbutton 4, the gate will stopat the expected positionthat you
haveset.
?Set auto-close function of pedestrian mode: Make thefirst switch of SW (DIP-
switch) to ONposition (down), press button 4 to open the gate (see Verify open
direction section). Wait untilthe gate travelsthe distance as your requirements (about
3~ 10 sec.).Thenpress thesame buttonto stop the gate, wait for someseconds as
your requirements (1~44 sec.), this period of time is regarded as ‘auto-close timeof
pedestrian mode’.Close the gate by pressingthe same button. Press thesame button
again to stop the gate or the gate willstop atits closed position automatically. Then
rememberto make the firstswitch ofSW (DIP-switch) to OFF position (up) immediately.
Thus ‘the auto-close function of pedestrian mode’has been set. (Note: the new width of
pedestrian mode has been re-programmed and replaced the original width that you have
set inSet width of pedestrianmodesection.) If you open thegate with button 4, the
gate will stop at the new expectedposition that you have set. After some seconds as
what you have set, the gate will close automatically.
lCancel width / auto-close function of pedestrian mode
?Cancel width and auto-close function of pedestrian mode (factorypreset): Make
the first switch of SW (DIP-switch) to ON position (down), press button 4 to open the
gate (seeVerify open direction section).Waitfor more than 15 sec.. Then press the
same button to stop the gate, wait until thegate close automatically (45 sec). Stop the
gate by pressingthe same button or the gate will stop atits closed position. Thenmake
the first switch of SW (DIP-switch) to OFFposition (up) immediately. Thus ‘the width and
auto-close function of pedestrian mode’have been cancelled.
?Cancel width of pedestrian mode, keep auto-close function of pedestrian mode:
Make the first switch ofSW (DIP-switch) to ON position (down), press button 4 to open
the gate (seeVerify open direction section). Waitfor more than 15 sec.. Then press
the same button to stop the gate, wait several seconds as yourrequirements (1~44
sec.), then close the gate by pressing the same button, pressthesame button again to
stop the gate or the gate will stop at its closed position automatically.Then make the
first switch ofSW(DIP-switch) to OFF position (up) immediately. Thus ‘the width of
pedestrian mode’has been cancelled. ‘The auto-close function of pedestrian mode’has
been reserved. (Note:the new auto -close time of pedestrian mode has been re-
programmed in the device and replacedthe original auto-close time of pedestrian mode
which you have set in Setauto-close function of pedestrian mode section.)
?Keep width of pedestrian mode, cancel auto-close function of
pedestrian mode: Make the first switch of SW(DIP-switch) to ON position(down), press
button 4 to open the gate(see Verify open direction section).Wait until the gate travels
the distance as yourrequirements (the distance range is 0.3m~1.5m or wait for 3~10
sec.).Then pressthe same button to stop the gate, wait untilthegate close
automatically (45 sec.). Stop thegate by pressing the same button or the gate will stop
at its closed position automatically. Then makethe first switch of SW (DIP-switch) to
OFF position (up) immediately. Thus‘the width of pedestrian mode’has beenreserved,
‘the auto -close function ofpedestrianmode’has been cancelled. (Note: the new width of
pedestrian mode has been re-programmed in the device and replacedthe original
width.)

Fig.3Control Board Scheme
Terminal blocks: Figure 4
Terminal block Mark Description
AC IN Battery chargepowersupply input (i.e. transformer
output: 16 V AC/30 VA)
JX1 + –Solar input
12, 0, 5 Power supply output (DC12V, GND, DC5V)
RF Remotecontrolsignal input (only suitable for our remote
control)
JX2
DI Keypad signal input
12, 0 Power supply output (DC12V, GND)
IR Infrared photocell input JX3 BI Opensignal input
JX4 Z Z Alarm lamp (DC12V)
OP, CO, CL Limit switch (open limit, common, close limit)
JX5 D, D Motor
1It is used to adjust theauto-close time andpedestrian
mode.
2No connection
3Noconnection
SW
(DIP-switch)
4It is used for open and close limit adjustments.
LED1 Battery charge indicator light
LED2 Status indicator light
LEARN Learn button
Others
VR2 Setthe open force

VR3 Set the close force
Motor
Limit switch
COM
Open (N.C.)
Infrared
input(N.C.)
Open signal
input(N.O.)
Keypad signal
input(N.O.)
D
D
CL
CO
OP
JX5
IR
0
12
12
0
BI
JX3
JX2
RF
5
0
12
DI
Close(N.C.)
Limit Switch
?Limit switch: The switch is used to accurately stop the gate in the open and closed
positions.
If thegate stops at the opened position when thelimit switch is reached, the gate will not
move if it receives open signals.
If thegate stops at the closed position when thelimit switch is reached,the gate will not move
if it receives close signals.
Adjust the limitswitch(see Fig.8)
Please adjust the close limit prior to the open limit. The close limit adjustment has three steps
which include rough adjusting, fine adjusting and micro adjusting. Once you have set up the
close limit you can follow the same three steps for setting of the open limit.
lRough adjusting: close the gate by using a remote transmitter that has been
programmedintotheSKC-500DC operator, stop the gate approximately 30-40cm before
the gate is fully closed using the pre-programmed transmitter. Making sure the limit cam
hasn’t activated on the limit switch. Once you have stopped the gate adjust the limit cam
until the limit switch is activated. Open the gate so the closed limit switch is de-activated,
the motor can be stopped at any time once the closed limit has been cleared. Finally
close the gate and ensure that the gate stops at approximately 30-40cm from the
gatepost once the limit switch is reached.
lFine adjusting: adjust the limit cam carefully to make the gate approach the closed
position. When the limit cam clicks, the gate can move about 10cm. Repeat this step until
the gate is less than 10cm from the closed position. Also the gate can be manually
closed once released, which will allow the movement of the gate closer to the fully closed
position. Adjust limit cam until limit switch is activated. Open the gate until the closed limit
has been cleared and reclose the gate to check that the closed position is less than
10cm from the fully closed position.
Note: If the closed limit adjustment exceeds the gatepost, the gate will auto reverse after
hitting the gatepost.
lMicro adjusting: after fine adjustment, measure the distances from the gate to the closed
position (for example 6cm), making sure that the limit switch has been activated via the
limit cam in the closed position. Then turn on the fourth DIP-switch (the last switch) to the
down position. Open the gate using the remote transmitter to allow the closed limit
switch to be cleared and stop the gate at any time using the remote transmitter. Close
the gate again using remote transmitter, the gate will auto stop when the limit switch is
reached. Then with every press of the LEARN button the gate operator will be
programmed to move 1cm past the limit cam. (For example, if there is about 6cm for the
gate to be fully closed, the LEARN button needs to be pressed 6 times, and the LED2
will flash each time the LEARN button is pressed). After this setup is complete, return
DIP-switch 4 to the OFF position (up).
lAfter adjusting, you can open the gate then close the gate and observe whether the gate
has successfully reached the closed position. If the gate does not reach the closed
position by more than 1cm the micro adjusting process can be re-programmed to suit the
desired distance. (Useful experience: using the 6cm example as above, the micro

adjusting can be achieved in two stages. Beginning with a 4cm adjustment. After the
4cm process has been tested if an additional 2cm is required a final micro adjustment
can be done. Themaximum micro adjustment is 10cm. If you exceed this limit any
previous adjustment will be cancelled and micro adjustment will have to be re
programmed.
lThe open limit adjusting process also has three steps: rough, fine and micro adjusting.
The process is the same as the close limit adjusting as above.
Manual operation (see Fig.1)
If the gate has to be operatedmanuallydue to a power cut or malfunction of the automated
system, use the release key as follow:
lFit the supplied key in the hole.
lTurn thekey counter-clockwise to disengage the clutch.
lOpen and close the gate manually.
Safety Auto Reverse
Obstruction Sensor
The Obstruction Sensor continuously monitors the gate movement for any obstructions. If any
obstructions are detected when thegate is closing, the gate will stop and reverse back to the
open position. If any obstructions are detected when opening, the gate will stop. The factory
setting is set at MAXIMUM sensitivity. You may need to increase or decrease depending on
the weight andthecondition of your gate.
Adjustment of the Auto-Reverse Function
?Tuning theauto-reversesafety function: To adjust the opening force,rotate the ‘Open Force
VR2’ knob (See control board scheme Figure 3) with a screwdriver. The resistance may be
increasedor decreased by rotating clockwise or counterclockwise. To adjust the closing
force rotate the‘Close Force VR3’ knob (See control board scheme Figure 3) with a

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 ofthe 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‘CL’.(2) When thegatemeets the correct place in both open and closed
positions, it will auto-stop and switch off automatically; otherwise,exchangethe two wires
‘OP’and‘CL’.
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 inthe path duringthetesting 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 0andDIterminal momentarilyon Box JX2. This type of
switch is very common. To install,attach one lead of your keypad to the DIterminal andthe
other to the 0terminal. The keypad will function in single channel mode just liketheRF
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
Amagnetic loop detector detects vehiclesthat 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. Wire 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 Detectordevice can be obtained through your
dealer. To find a dealer, go towww.gatekeeperltd.com/dealers

Safe guard (Infrared device or Photocell)
It is recommended that the installer purchase and install infrared photocells for additional
safety. Photocells work by inhibiting the movement of the gate if the beam is broken. Infrared
safety devices may be required by law in some areas. If the infrared beam is broken during
closing, the gates will reverse and open immediately. During opening,the beeper will ring.
Infrared photocells come in active and passive varieties. Active photocells require power on
both sides of the driveway, passive photocells employ a reflector plate so that power is only
required on one side of the driveway. Most photocells will provide DC power input wires +
and-, and normally closed switch wires. To install the photocell, attach the DC power + wire
to terminal 12 on jack JX3, and the common, ground or –DC wire to 0 on jack JX3. Attach
the normally closed wire to IR and the common normally closed wire to 0. In most cases
these signal wires are not polarized so they can be interchanged without issue. Consult your
manufacturer’s documentation for details.See Figure 4 for a diagram of external interface
connections. The infrared device can be obtained through your dealer.To find a dealer, go
to www.gatekeeperltd.com/dealers
Maintenance
Every six months check the following items for proper operation of the unit:
lCheck the chain lubricant and add 1# grease regularly.
lLubricate shafts and sprockets.
lKeep opener clean at all times. Check inside cover for insects.
lCheck and tighten anchors bolts.
lThe operator can be powered by battery in case of power failure. It still can provide
enough power for operating 10 cycles after power disruption. Operating should be less
than 20 cycles a day. Please switch off the battery if no power is available for more than
5 days (remove the plastic cover, Turn the switch on top of the operator to the off
position). Failure to comply with the above instructions may damage the battery or
shortenits life.
lWe recommend you put some grease in the keyhole to avoid rusting, also regularly
grease the wheels and axles if the gate was jammed or cannot be moved smoothly.
Occasionally inspect the chain to ensure that it is well lubricated, and oil the chain as
necessary.

Table 3Troubleshooting
Trouble PossiblecausesSolutions
The wire connector terminal
block becomes loose.
Check wire connector terminal block
make sure it is plugged in terminal
block 10 (X8).
The limit switch wire connector
terminal block becomes loose.
Check limit switch wire connector
terminal block make sure it is
plugged in terminal block 9 (X9).
Check thelimit switch mode.
Motor only runs in one direction.
The electric component on the
control board such as Q2, Q91
or Q92 may be damaged.
Replace the electric component Q2,
Q91 or Q92 (BTA16/600) or replace
the board.
Gate auto-closes immediately after
opening. The auto-close time is too short. Resetthe auto-close time. See Set auto-close functionsection.
When you use button 4 of remote
control to openthegate(pedestrian
mode), gate travels too short.
The width of pedestrian mode is
too narrow. Resetthe width of pedestrian mode.
See Set width of pedestrian mode
section.
When you use button 4 of remote
control to openthegate(pedestrian
mode), but the gate will auto-close
immediately.
The auto-close time of
pedestrian mode is too short.
Resetthe auto-close time of
pedestrian. SeeSet auto-close
function of pedestrian mode
section.
The limit switch wire connector
terminal block becomes loose. Check the limit switch mode (see table 1 Dip-switch).
Connectingwires or terminal
blocks are too loose. Check the connecting wires and terminal blocks.
The electric component on the
control board such as Q2, Q91
or Q92 may be damaged.
Replace the electric component Q2,
Q91 or Q92 (BTA16/600) or replace
the board.
The gate will not open or close.
Power switch is OFF Make sure power switch is ON.
The indicator light of remote
control does not light. Check the batteries on your remote control.
Remote control is not suitable
for receiver.
After making sure the codes are
correct, erase remote controls and
then re-program the codes in the
device. SeeAdding extra remote
controls (learning) section.
Remote control does not work
Broken receive board Replace receive board.
The Force Adj. (VR1) is adjusted
toosmall. Check the Force Adj. (VR1). Adjust VR1 to increase force.
When you open the gate by using
the remote control, gate will stop in
mid-travel or reverse before
reaching the fully limit position. Gate is obstructed.Remove the obstruction.
The remote controloperating
distance is too short. Signals are shielded by the gate.
Link a new antenna (1~1.2m BVR
0.75mm2 see partslist) to the old
antenna. Then fix the antenna on
the wall vertically, make sure the
total height fromthetop of antenna
to the ground is approx. 1.5m.

Gatekeeper Ltd. Limited Warranty
Gatekeeper Ltd. Warrants theSKC-500DC SlidingGate Opener to be free of defects in
materials and workmanship for a period of 1 year from the date of purchase subject to certain
limitations.
This warranty shall not apply inthe following circumstances, misuse, vandalism, accident,
neglect, unauthorized repair or modification, acts of God (lightning, flood, insect damage etc.),
power surge, corrosive environments, incorrect installation or application, damage to
mechanism due to wrong type of gate, incorrect weight, gate not operating freely or not on
level ground etc.
The warranty set forth here shall be entirely exclusive and no other warranty, either written or
verbal is expressed or implied, Gatekeeper Ltd specifically disclaims any and all implied
warranties of merchantability or fitness for a particular purpose. It is the purchaser’s sole and
exclusive responsibility to determine whether or not the equipment will be suitable for a
particular purpose. In no event shall Gatekeeper Ltd be held liable for direct, indirect,
incidental, special, or consequential damages or loss of profits whether based on contract,
tort, or any other legal theory during the course of the warranty or at any time thereafter.The
installer, purchaser and /or end-user do agree to assumeall responsibility for all liability in use
of this product, releasing Gatekeeper Ltd of all liability.
For service under this warranty, please contact your dealer. All parts, accessories, service
and support for Gatekeeper products is supplied through our network of dealers. Dealer
information can be obtained at www.gatekeeperltd.com/dealers