DKS Series 6550 Operating instructions

Installation/Owner’s Manual
Series 6550
Series 6550
Series 6550
Copyright 2009 DoorKing, Inc.All rights reserved.
TM
Copyright 2012 DoorKing, Inc.All rights reserved.
Use this manual for circuit board 4405-010 Revision E or higher.
Date Installed:
Installer/Company Name:
Phone Number:
Leave Manual with Owner
Heavy-Duty Vehicular Swing Gate Operator
Circuit Board
Serial Number
and Revision Letter:
UL 325 Compliant
6550-065-A-4-12

6550-065-A-4-12 1
SPECIFICATIONS
35.25”
20.5” 29.5”
38.5”
38”
Class of Operation Model 6550 - UL325 Class I, II, III, IV
Type of Gate Vehicular Swing Gates Only
Entrapment Protection Primary - Inherent entrapment sensing system (Type A)
Secondary - Provision for connection of a non-contact sensor (Type B1)
Horsepower - Volts
1 HP - 115 VAC
1 HP - 115 VAC
1 HP - 208 VAC
1 HP - 230 VAC
1 HP - 460 VAC
Model #
6550-080
6550-081
6550-082
6550-083
6550-084
Max Gate
Weight
2000 Lbs.
2000 Lbs.
2000 Lbs.
2000 Lbs.
2000 Lbs.
Type
Operator
Primary
Secondary
Primary
Primary
Primary
Max Gate
Length
25 Ft.
25 Ft.
25 Ft.
25 Ft.
25 Ft.
Cycles Per
Hour
60
60
60
60
60
Speed
90°
12-14 Sec
12-14 Sec
12-14 Sec
12-14 Sec
12-14 Sec
1ø
1ø
1ø
1ø
1ø
Phase Amp
9.7
9.7
4.9
4.9
2.5
Use this manual for the Model 6550 operators with circuit board 4405-010 Rev E or higher ONLY.
DoorKing, Inc. reserves the right to make changes in the products described in this manual without notice and without obligation of DoorKing, Inc. to notify any persons
of any such revisions or changes. Additionally, DoorKing, Inc. makes no representations or warranties with respect to this manual. This manual is copyrighted, all rights
reserved. No portion of this manual may be copied, reproduced, translated, or reduced to any electronic medium without prior written consent from DoorKing, Inc.

6550-065-A-4-12
2
TABLE OF CONTENTS
SPECIFICATIONS 1
ASTM F2200 Standard for Gate Construction
Important Safety Instructions
Instructions regarding intended installation:
Important Notices
UL 325 Entrapment Protection
Glossary
Swing Gate Requirements
Swing Gate Protection
4
4
4
5
6
7
8
9
SECTION 1 - INSTALLATION 10
10
10
11-12
12
13
14
14
1.1 Underground Conduit Requirements
1.2 Concrete Pad
1.3 Type of Installations
1.4 Securing Operator to Pad
1.5 Attach Gate Bracket
1.6 Determining Arm Lengths
1.7 Installation of Warning Signs
SECTION 2 - AC POWER TO OPERATOR(S) 14
15
15
16
2.1 High Voltage Wire Run
2.2 High Voltage Terminal Connection
2.3 Bi-Parting Gates Wiring - Dual Gate Operators
SECTION 3 - ADJUSTMENTS 18
3.1 4405 Circuit Board Descriptions and Adjustments
3.2 DIP-Switch Settings for 4405 Circuit Board
3.3 Limit Sensors
3.4 Inherent Reverse Sensors Adjustment
3.5 Secondary Current Sensor Adjustment
18
18-19
20
21
22

6550-065-A-4-12 3
TABLE OF CONTENTS
SECTION 4 - ENTRAPMENT AND SAFETY PROTECTION 23
23
24
25
4.1 UL 325 Terminal Description
4.2 Entrapment and Safety Protection Device Locations
4.3 Loop Detector Wiring
SECTION 5 - MAIN TERMINAL WIRING 26
26
27
5.1 Terminal Description
5.2 Control Wiring
SECTION 7 - MAINTENANCE AND TROUBLESHOOTING 32
7.1 Maintenance
7.2 Troubleshooting
7.3 Built-in Diagnostics
7.4 Accessory Items
7.5 Gearbox Shaft Extension Replacement
Model 6550’s Wiring Diagrams
32
33-34
35
35
36
37-39
SECTION 6 - OPERATING INSTRUCTIONS 28
6.1 AC Power Switch and Reset Button
6.2 Shutdown Conditions
Soft Shutdown
Hard Shutdown
6.3 Manual Gate Operation
Emergency Vehicle Access Conditions
Manual Release
30-31
28
29-30

6550-065-A-4-12
4
Instructions regarding intended installation:
Vehicular gates should be constructed and installed in accordance with ASTM F2200; Standard Specification for Automated
Vehicular Gate Construction. For a copy of this standard, contact ASTM directly at 610-832-9585; [email protected]; or
www.astm.org.
Important Safety Instructions
WARNING - To reduce the risk of injury or death:
1. READ AND FOLLOW ALL INSTRUCTIONS.
2. Never let children operate or play with gate controls. Keep the remote control away from children.
3. Always keep people and objects away from gate. NO ONE SHOULD CROSS THE PATH OF THE MOVING GATE.
4. Test the operator monthly. The gate MUST reverse on contact with a rigid object or stop or reverse when an object
activates the non-contact sensors. After adjusting the force or the limit of travel, retest the gate operator. Failure to adjust
and retest the gate operator properly can increase the risk of injury or death.
5. Use the emergency release only when the gate is not moving.
6. KEEP GATES PROPERLY MAINTAINED. Read the owner's manual. Have a qualified service person make repairs to gate
hardware.
7. The entrance is for vehicles only. Pedestrians must use separate entrance.
8. SAVE THESE INSTRUCTIONS!
•Install the gate operator only if:
1. The operator is appropriate for the construction of the gate and the usage class of the gate.
2. All openings of a horizontal slide gate are guarded or screened from the bottom of the gate to a minimum of 6 feet
(1.83 m) above the ground to prevent a 2 ¼ inch (57.2 mm) diameter sphere from passing through the openings
anywhere in the gate, and in that portion of the adjacent fence that the gate covers in the open position.
3. All exposed pinch points are eliminated or guarded.
4. Guarding is supplied for exposed rollers.
•The operator is intended for installation only on gates used for vehicles. Pedestrians must be supplied with a separate
access opening. The pedestrian access opening shall be designed to promote pedestrian usage. Locate the gate such that
persons will not come in contact with the vehicular gate during the entire path of travel of the vehicular gate.
•The gate must be installed in a location so that enough clearance is supplied between the gate and adjacent structures
when opening and closing to reduce the risk of entrapment. Swinging gates should not open into public access areas.
•The gate must be properly installed and work freely in both directions prior to the installation of the gate operator. Do not
over-tighten the operator clutch, pressure relief valve or reduce reversing sensitivity to compensate for a damaged gate.
•For gate operators utilizing Type D protection:
1. The gate operator controls must be placed so that the user has full view of the gate area when the gate is moving.
2. A warning placard shall be placed adjacent to the controls.
3. An automatic closing device (such as a timer, loop sensor, or similar device) shall not be employed.
4. No other activation device shall be connected.
•Controls intended for user activation must be located at least ten feet (10’) away from any moving part of the gate and
where the user is prevented from reaching over, under, around or through the gate to operate the controls. Outdoor or
easily accessible controls should have a security feature to prevent unauthorized use.
•The Stop and/or Reset button must be located in the line-of-sight of the gate. Activation of the reset control shall not
cause the operator to start.
•A minimum of two (2) WARNING SIGNS shall be installed, one on each side of the gate where easily visible.
•For gate operators utilizing a non-contact sensor:
1. See the instructions on the placement of non-contact sensors for each type of application.
2. Care shall be exercised to reduce the risk of nuisance tripping, such as when a vehicle trips the sensor while the gate
is still moving in the opening direction.
3. One or more non-contact sensors shall be located where the risk of entrapment or obstruction exist, such as the
perimeter reachable by a moving gate or barrier.
ASTM F2200 Standard for Gate Construction

6550-065-A-4-12 5
•For gate operators utilizing contact sensors:
1. One or more contact sensors shall be located where the risk of entrapment or obstruction exist, such as at the
leading edge, trailing edge, and post mounted both inside and outside of a vehicular horizontal slide gate.
2. One or more contact sensors shall be located at the bottom edge of a vehicular vertical lift gate.
3. One or more contact sensors shall be located at the pinch point of a vehicular vertical pivot gate.
4. A hardwired contact sensor shall be located and its wiring arranged so that the communication between the sensor
and the gate operator is not subjected to mechanical damage.
5. A wireless contact sensor such as one that transmits radio frequency (RF) signals to the gate operator for
entrapment protection functions shall be located where the transmission of the signals are not obstructed or
impeded by building structures, natural landscaping or similar obstructions. A wireless contact sensor shall function
under the intended end-use conditions.
6. One or more contact sensors shall be located at the bottom edge of a vertical barrier (arm).
Vehicular gate operator products provide convenience and security. However, gate operators must use high levels of force
to move gates and most people underestimate the power of these systems and do not realize the potential hazards associ-
ated with an incorrectly designed or installed system. These hazards may include:
•Pinch points
•Entrapment areas
•Reach through hazards
•Absence of entrapment protection devices
•Improperly located access controls
•Absence of vehicle protection devices
•Absence of controlled pedestrian access
In addition to these potential hazards, automated vehicular gate systems must be installed in accordance with the UL 325
Safety Standard and the ASTM F2200 Construction Standard. Most lay persons are unaware of, or are not familiar with,
these standards. If an automated vehicular gate system is not properly designed, installed, used and maintained, serious
injuries or death can result. Be sure that the installer has instructed you on the proper operation of the gate and gate
operator system.
Be sure that the installer has trained you about the basic functions of the required reversing systems associated with your
gate operating system and how to test them. These include reversing loops, inherent reversing system, electric edges,
photoelectric cells, or other external devices.
•This Owner’s Manual is your property. Keep it in a safe place for future reference.
•Be sure that all access control devices are installed a minimum distance of 10 feet away from the gate and gate
operator, or in such a way that a person cannot touch the gate or gate operator while using the device. If access
control devices are installed in violation of these restrictions, immediately remove the gate operator from service
and contact your installing dealer.
•Loops and loop detectors, photo-cells or other equivalent devices must be installed to prevent the gate from
closing on vehicular traffic.
•The speed limit for vehicular traffic through the gate area is 5 MPH. Install speed bumps and signs to keep
vehicular traffic from speeding through the gate area. Failure to adhere to posted speed limits can result in
damage to the gate, gate operator, and to the vehicle.
•Be sure that all persons who will use the gate system are familiar with the proper use of the gate and gate
operator and are familiar with the possible hazards associated with the gate system.
•Be sure that warning signs are permanently installed on both sides of the gate in an area where they are fully
visible to traffic.
•It is your responsibility to periodically check all entrapment protection devices. If any of these devices are
observed to function improperly, remove the operator from service immediately and contact your installing or
servicing dealer.
•Follow the recommended maintenance schedule.
•Do not allow children to play in the area of the operator or to play with any gate-operating device.
•To remove the gate operator from service, operate the gate to the full open position and then shut off power to
the operator at the service panel.
Important Notices

6550-065-A-4-12
6
UL 325 Entrapment Protection
Class I
Class I and II
Class III
Class IV
Class II
Class III Class IV
A vehicular gate operator (or system) intended for use in a
home of one-to four single family dwelling, or a garage or
parking area associated therewith.
A vehicular gate operator (or system) intended for use in a
commercial location or building such as a multi-family
housing unit (five or more single family units) hotel,
garages, retail store or other building servicing the general
public.
A vehicular gate operator (or system) intended for use in a
industrial location or building such as a factory or loading
dock area or other locations not intended to service the
general public.
A vehicular gate operator (or system) intended for use in a
guarded industrial location or building such as an airport
security area or other restricted access locations not
servicing the general public, in which unauthorized access
is prevented via supervision by security personnel.
This table illustrates the entrapment protection requirements for each of the four UL 325 classes.
A- Inherent entrapment protection system.
B1 - Provision for connection of, or supplied with, a non-contact sensor (photoelectric sensor or the equivalent).
When used as the PRIMARY device, must be monitored.
B2 - Provision for connection of, or supplied with, a contact sensor (edge device or the equivalent).
When used as the PRIMARY device, must be monitored.
C- Inherent adjustable clutch or pressure relief device.
D- Provision for connection of, or supplied with, an actuating device requiring continuous pressure to maintain
opening or closing motion of the gate.
E- An inherent audio alarm.
STATE PRISON
UL 325
Classifications
Horizontal Slide, Vertical Lift, Vertical Pivot Swing and Vertical Barrier (arm)
Primary Protection
AB1, B2 or D A, B1, B2, C or DA or C
A, B1 or B2 A, B1, B2, D or E A, B1, B2, C or DA, B1, B2 or C
A, B1, B2 or D A, B1, B2, D or E A, B1, B2, C, D or EA, B1, B2, C or D
Secondary Protection Primary Protection Secondary Protection

6550-065-A-4-12 7
Glossary
GATE - A moving barrier such as a swinging, sliding, raising, lowering, or the like, barrier, that is a stand-alone passage
barrier or is that portion of a wall or fence system that controls entrance and/or egress by persons or vehicles and
completes the perimeter of a defined area.
RESIDENTIAL VEHICULAR GATE OPERATOR – CLASS I - A vehicular gate operator (or system) intended for use in a home
of one-to four single family dwelling, or garage or parking area associated therewith.
COMMERCIAL / GENERAL ACCESS VEHICULAR GATE OPERATOR - CLASS II - A vehicular gate operator (or system)
intended for use in a commercial location or building such as a multi-family housing unit (five or more single family units),
hotels, garages, retail store, or other building servicing the general public.
INDUSTRIAL / LIMITED ACCESS VEHICULAR GATE OPERATOR - CLASS III - A vehicular gate operator (or system)
intended for use in an industrial location or building such as a factory or loading dock area or other locations not intended
to service the general public.
RESTRICTED ACCESS VEHICULAR GATE OPERATOR - CLASS IV - A vehicular gate operator (or system) intended for use in
a guarded industrial location or building such as an airport security area or other restricted access locations not servicing
the general public, in which unauthorized access is prevented via supervision by security personnel.
VEHICULAR BARRIER (ARM) OPERATOR (OR SYSTEM) - An operator (or system) that controls a cantilever type device (or
system), consisting of a mechanical arm or barrier that moves in a vertical arc, intended for vehicular traffic flow at
entrances or exits to areas such as parking garages, lots or toll areas.
VEHICULAR HORIZONTAL SLIDE-GATE OPERATOR (OR SYSTEM) - A vehicular gate operator (or system) that controls a
gate which slides in a horizontal direction that is intended for use for vehicular entrance and exit to a drive, parking lot, or
the like.
VEHICULAR SWING-GATE OPERATOR (OR SYSTEM) - A vehicular gate operator (or system) that controls a gate which
moves in an arc in a horizontal plane that is intended for use for vehicular entrance and exit to a drive, parking lot, or the
like.
SYSTEM - In the context of these requirements, a system refers to a group of interacting devices intended to perform a
common function.
WIRED CONTROL - A control implemented in a form of fixed physical interconnections between the control, the associated
devices, and an operator to perform predetermined functions in response to input signals.
WIRELESS CONTROL - A control implemented in means other than fixed physical interconnections (such as radio waves or
infrared beams) between the control, the associated devices, and an operator to perform predetermined functions in
response to input signals.
INHERENT ENTRAPMENT PROTECTION SYSTEM - A system, examples being a motor current or speed sensing system,
which provides protection against entrapment upon sensing an object and is incorporated as a permanent and integral part
of the operator.
EXTERNAL ENTRAPMENT PROTECTION DEVICE - A device, examples being an edge sensor, a photoelectric sensor, or
similar entrapment protection device, which provides protection against entrapment when activated and is not incorporated
as a permanent part of an operator.
ENTRAPMENT - The condition when an object is caught or held in a position that increases the risk of injury.

6550-065-A-4-12
8
Swing Gate Requirements
The operator is intended for installation only on gates used for vehicles. Pedestrians must be supplied with a separate
access opening. The pedestrian access opening shall be designed to promote pedestrian usage. Locate the gate such that
persons will not come in contact with the vehicular gate during the entire path of travel of the vehicular gate.
(ref. UL325 56.8.4.b)
Not Allowed OK
Closed Gates
Gates shall have smooth bottom edges, with vertical bottom edged protrusions not exceeding 0.50 inches. ASTM F2200 4.3
Opened Gate Opened Gate
If distance is greater than 4 inches,
entrapment protection for this area is
required. ASTM F2200 7.1.1.1
If distance is less than 16 inches,
entrapment protection in this area
is required. ASTM F2200 7.1.1.2
A
B
A
B
Closed Gate
With the hinge mounted on
the corner of the pilaster,
the entrapment area is
eliminated and protection
is NOT required for this
area.
Closed Gate
Opened Gate
Opened Gate
A

6550-065-A-4-12 9
Swing Gate Protection
Non-contact Sensor
Reverse Loop
Shadow Loop
Automatic Exit Loop
C
D
D
C
Minimizes the potential of the gate
closing when a vehicle is present.
Number and placement of loops is
dependent on the application.
Reverse Loop
Minimizes the potential of the gate
closing when a vehicle is present.
Number and placement of loops is
dependent on the application.
(Optional) will provide an open
command to the gate operator(s)
when a vehicle is exiting the
property.
Provides a hold open command to
the operator(s) only if the gate(s)
are at the full open position.
Separate Pedestrian
Walkway
Located so pedestrians
cannot come in contact
with the vehicular gate.
Warning Signs
D
Permanently mounted
and easily visible from
either side of the gate.
Moving Gate Can Cause
Serious Injury or Death
KEEP CLEAR! Gate may move at any time
without prior warning.
Do not let children operate the gate or play
in the gate area.
This entrance is for vehicles only.
Pedestrians must use separate entrance.
Minimizes the potential
of the gate closing on
vehicular or other traffic
that loops cannot sense.
See pages 23-24 for
typical layout locations.
See page 25 for loop information.

6550-065-A-4-12
10
SECTION 1 - INSTALLATION
1.1 Underground Conduit Requirements
1.2 Concrete Pad
Sweeps Concrete Pad
Primary
Operator
Position
Secondary
Operator
Position
Underground depth of the concrete
pad is determined by soil conditions
and local building codes. Reinforced
concrete recommended.
24” Concrete Pad Width
36” Concrete Pad Length
Concrete pad
MUST be level.
Note: Bevel the
edges of concrete
pad to eliminate
water puddling
under the operator.
4” minimum above ground
Conduit Location
24”
Approximate
Conduit Position
CAUTION
NEVER REMOVE HUB
after manual release.
•The conduit requirements are for a typical slide gate operator installation (the secondary operator is shown for those
applications where a secondary operator may be used). The conduit requirements for your application may vary from
this depending on your specific needs.
•Use only sweeps for conduit bends. Do not use 90° elbows as this will make wire pulls very difficult
and can cause damage to wire insulation.
•DoorKing recommends using 3/4-inch conduit.
•Be sure that all conduits are installed in accordance with local codes.
•Never run low voltage rated wire insulation in the same conduit as high voltage rated wire insulation.
Elbow
NO
Sweep
YES
Control and/or P.A.M.S. Wires (Low Voltage wire insulation)
Loop Lead-In Wires (Low Voltage wire insulation)
AC Input Power (High Voltage wire insulation)
DoorKing’s Primary/Secondary Interconnection Cable (Dual Operator Application Only)
(Secondary Power and Communication wires)
38”
Center Line
3”
Conduit
Area
13” x 6 1/2”
Conduit
Area
21 1/4”
to
Center
of
Conduit
Area
6 1/2”
12”
6 1/2”
6 1/2”
29”
to
Center
of
Conduit
Area
13” x 7 1/2”
208/230/460
Step-Down
Transformer
Plate
Prior to beginning the installation of the swing gate operator, we suggest that you become familiar with the
instructions, illustrations, and wiring guide-lines in this manual. This will help insure that your installation is
performed in an efficient and professional manner compliant with UL 325 safety and ASTM F2200 construction
standards.
The proper installation of the vehicular swing gate operator is an extremely important and integral part of the
overall access control system.
Check all local building ordinances and building codes prior to installing
this operator. Be sure your installation is in compliance with local codes.

6550-065-A-4-12 11
Standard Installation
Operator Installation
1.3 Type of Installations
Recommended for gates up to 25 feet opening 90°.
Concrete Pad
90°
90°
Alternate Installation
Concrete Pad Location
Concrete Pad Location
Operator Installation
Recommended for gates up to 18 feet opening 90°.
Concrete Pad
1
2
24”
36”
17”
46” 14”
44”
35”
38.5”
30”
42” 14”
38”
35”
35”
30”
2”
24”
36”
17”
2”
Space Gained from Alternate Installation
12”
12”

6550-065-A-4-12
12
Compact Installation
3
90°
Concrete Pad Location
Operator Installation
Concrete Pad
34” 14” 12”
26”
30”
29.5”
24”
36”
12”
2”
26”
Recommended for gates up to 14 feet opening 90°.
Permanently attach the operator to the concrete pad using six
(6) 3/8” x 3” sleeve anchors (not supplied).
1.4 Securing Operator to Pad
Sleeve Anchor
(Not supplied)
3/8
208/230/460
Step-Down
Transformer
Plate

6550-065-A-4-12 13
Gate Bracket
A
FE
D
C
B
38”
Arm assembly and gate bracket MUST
be level for gate to function correctly.
Elbow
Assembly
Release hub with release tool. DO NOT REMOVE HUB!
Bolt crank arm to operator.
Slide elbow assembly on crank arm.
Bolt control arm to gate bracket.
Slide control arm into elbow assembly.
KEEP ARM ASSEMBLY LEVEL.
Bolt gate bracket to gate.
1.5 Attach Gate Bracket
A
D
F
E
B
CGate Bracket
Control Arm
CAUTION
DO NOT REMOVE HUB!
Control Arm
Crank Arm
D

6550-065-A-4-12
14
1.6 Determining Arm Lengths
Slide elbow assembly back and fourth, manually opening and closing gate until satisfied with the gate’s 90° open and fully
closed positions.
Mark and cut off excess arms. Secure arms to elbow assembly with 6 allen screws. Tighten hub and replace release tool. Install
safety covers.
SECTION 2 - WIRING
Before attempting to connect any wiring to the operator, be sure that the circuit breaker in the electrical panel is in the OFF
position. Permanent wiring must be installed to the operator as required by local electrical codes. It is recommended that a
licensed electrical contractor perform this work.
Since building codes vary from city to city, we highly recommend that you check with your local building department prior
to installing any permanent wiring to be sure that all wiring to the operator (both high and low voltage) complies with local
code requirements.
THIS GATE OPERATOR MUST BE PROPERLY GROUNDED!!
1.7 Installation of Warning Signs
This DoorKing Swing Gate Operator is shipped with two warning signs. The
purpose of the warning sign is to alert uninformed persons, and to remind
persons familiar with the gate system, that a possible hazard exists so that
appropriate action can be taken to avoid the hazard or to reduce exposure
to the hazard. See page 9 for suggested mounting positions of signs.
•Permanently install the supplied warning signs in locations so
that the signs are visible by persons on both sides of the gate.
•Use appropriate hardware such as wood or sheet metal screws
(not supplied) to install the warning signs.
excess
excess

6550-065-A-4-12 15
2.1 High Voltage Wire Runs
2.2 High Voltage Terminal Connections
The distance shown in the chart is measured in Feet from the operator to the power source. If power wiring is greater than the
maximum distance shown, it is recommended that a service feeder be installed. When large gauge wire is used, a separate
junction box must be installed for the operator connection. The wire table is based on stranded copper wire. The wire run
calculations are based on a power source with a 3% voltage drop on the power line, plus an additional 10% reduction in
distance to allow for other losses in the system.
“Optional” 3.3 Amp Heater Installation Note: When installing the heater(s), refer to the “high voltage AC power wire size and
distance requirements” table on the instruction sheet with the heater kit (P/N 6550-480) for AC power wire run requirements.
This table illustrates the high voltage wire size and distance requirements for a single operator.
Reduce the wire distance in half for a primary/secondary dual gate operator application
Model
Type
Voltage
Required
Amps
Required
Wire Size / Distance in Feet
12 AWG 10 AWG 8 AWG 6 AWG
Never run low voltage rated wire insulation in the same conduit as high voltage rated wire insulation.
100
395
1550
9.7
4.9
2.5
115
208/230
460
162
630
2480
270
1055
4140
405
1580
6210
6550 1 HP
6550 1 HP
6550 1 HP
Chassis
Ground
Neutral
115 VAC
115 VAC
208/230/460 VAC 208/230/460 VAC 115 VAC Neu 115 VAC Neu 115 VAC Hot
•Route incoming high voltage power through conduit and
into the operator as shown.
•Be sure wiring is installed in accordance with local codes.
Be sure to color code all wiring.
•It is recommended that a surge suppressor be installed on
the high voltage power lines to help protect the operator
and circuit board from surges and power fluctuations.
•Secondary operator in a dual operator application gets AC
power through the 8-wire interconnection cable that
connects the 2 operators together. See next page.
208 / 230 / 460 VAC
Chassis
Ground
DANGER
HIGH VOLTAGE!
DO NOT cycle the operator without the OPEN and CLOSE limit sensors in their specific open
and close positions. The limit sensors or the AC power switch are the ONLY ways to stop the operator once
an open cycle has started. This could cause damage to the gate and/or operator if the gate opens too far!
High Voltage
AC Input Wire
High Voltage
AC Input Wire
HotNeu
PUSHTOOPERATE
technician use only
High Voltage
AC Input Wire
High
Voltage
Conduit
Use only two legs of the
incoming 3-phase power.
Output
Input

6550-065-A-4-12
16
PUSHTOOPERATE
technicianuseonly
2.3 Bi-Parting Gates Wiring - Dual Gate Operators
1
Motor
2
Motor
3
Neutral
4
24VAC
5
Limit
6
Spare
7
Limit
8
COM
1
Motor
2
Motor
3
Neutral
4
24VAC
5
Limit
6
Spare
7
Limit
8
COM
Conduit
Secondary Operator Terminal
Conduit
Primary
Operator
Secondary
Operator
Primary Operator Control Board (4405) •Secondary operator contains
NO control board.
•All loop detector, safety and access control devices
are wired to the primary operator.
Operator
Chassis
Ground
Primary/secondary
interconnection cable
in underground conduit.
AC Power
Optional 3.3 Amp Heater Installation Note:
If the optional heaters are to be installed on the
operators, run two (AWG 16-600 volt insulation)
power wires through the interconnection cable conduit to
power the secondary operator’s heater. Refer to the instruction
sheet with the heater kit (P/N 6550-480) for more information.
Connect the Primary/Secondary operators together with DoorKing’s interconnection cable as shown (Different lengths sold
separately). High voltage power and low voltage communications are supplied to the secondary operator by DoorKing’s UL
approved cable that is run in a single conduit. Two conduits (High voltage and low voltage) will need to be provided to the
secondary operator when NOT using DoorKing’s UL listed, wet environment interconnection cable.
(Red) Motor 1 High
(Blue) Motor 2 High
(White) Neutral 3 High
(Purple) 24VAC 4 Low
(Yellow) Limit 5 Low
(Brown) Spare 6 Low
(Orange) Limit 7 Low
(Gray) COM 8 Low
Motor 1 High (Red)
Motor 2 High (Blue)
Neutral 3 High (White)
24VAC 4 Low (Purple)
Limit 5 Low (Yellow)
Spare 6 Low (Brown)
Limit 7 Low (Orange)
COM 8 Low (Gray)
Secondary OperatorPrimary Operator
Interconnection Cable Wiring
SW 1,
switches 1
and 2 will
be opposite
each other.
Switch 6
MUST be
ON, see
page 18.
1
ON
23 4 5 67 8
DoorKing’s UL Listed (Wet Environment)
Primary/Secondary Interconnection Cable
30 feet: P/N 2600-755, 40 feet: P/N 2600-756, 50 feet: P/N 2600-757
Primary Operator
8-Pin
Secondary
Interface
Terminal
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
SELF
TEST
NC NO
1
2
3
4
5
6
7
8
9
13
12
11
10
14
15
16
17
18
19
20
4405
Chassis
Ground
AC power
conduit to primary
operator only.

6550-065-A-4-12 17
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1
ON SW 1
2 3 4 1
ON SW 2
REVERSE
LOOP
P2 P8
EXIT
LOOP
SELF
TEST
NC
TIME
DELAY
NO
REV SENSE
PRIMARY
REV SENSE
SECONDARY
1
2
3
4
5
6
7
8
9
13
12
11
10
14
15
16
17
18
19
20
2 3 45 6 7 8
9410
Single
Channel
4405-010
SECTION 3 - ADJUSTMENTS
The switch settings and adjustments in this chapter should be made after your installation and wiring to the operator(s) is
complete. Whenever any of the programming switches on the circuit board are changed, power must be shut-off, and then
turned back on for the new setting to take effect.
3.1 4405 Circuit Board Descriptions and Adjustments
Auto-close timer
(when turned on)
SW 1, switch 4.
Time Delay:
Adjust from 1 second
(full counter-clockwise)
to approximately 23
seconds (full clockwise).
Self-test mode is for
bench checks ONLY!
The operator will
continually cycle the gate.
The jumper must be set
at normal mode for
normal operator function.
Set the DIP-switches on
the circuit board to the
desired setting. See
switch-settings on next
2 pages. SW 1
SW 1
Self-Test
Mode
Normal
Mode
SW 2
Plug-In Loop Detectors (Sold separately)
Limit
Sensors
Plug P2
6-Pin UL 325 Removable
Terminal See page 23.
Secondary
Interface
Terminal Plug
123
EXIT Loop Terminal
REVERSE/SHADOW
Loop Terminals SHADOW Output Terminal
Self-Test
Auto-Close Timer How LEDs Function DIP-Switches
Adjust reversing sensitivity for
the open AND close direction of
the PRIMARY (single) and
SECONDARY (dual) operators,
See page 21.
Inherent
Reverse Sensors
Power LED
Loop LEDs
Input LEDs
See page 25.
Illuminated LEDs Indicates that
low voltage power is being
applied to the circuit board.
Input LEDs should be OFF and will
only illuminate when the input is
activated.
Limit LEDs will only illuminate when
the respective limit sensor has been
activated.
Loop LEDs will only illuminate when a
reverse, shadow or exit loop is
activated (Vehicle passing over a
loop).
1
ON
2 3 4 5 6 7 8 1
ON
2 3 4
1
ON
2 3 45 6 7 8
EXIT Loop PortREVERSE Loop Port
4-Pin Terminal
Not used for 6550.
Primary Current Sensor
Uses a sensing coil with a given
number of wire turns through it
to monitor the current flow of the
primary operator motor.
Factory Set:
1/2 HP Motor - 2 Turns
1 HP Motor - 1 Turn
Secondary Current Sensor
Uses a sensing coil with a given number of
wire turns through it to monitor the current
flow of the secondary gate operator motor.
Factory Set:
1/2 HP Motor - 2 Turns
1 HP Motor - 1 Turn
See page 22.
Secondary Primary
9409
Dual
Channel
N.C. N.O.
Dry Relay Contact
Terminals 10-11
can be set for
Normally Open
(NO) or Normally
Closed (NC) operation by placing
the relay shorting bar on the N.O. or
N.C. pins respectively.
(Standard shadow loop function, NO)
Limit LEDs
See page 20

6550-065-A-4-12
18
3.2 DIP-Switch Settings for 4405 Circuit Board
The two DIP-switches located on the circuit board are used to program the operator to operate in various modes and to turn on
or off various operating features. Whenever a switch setting is changed, power to the operator must be turned OFF and then
turned back on for the new setting to take affect. Check and review ALL switch settings prior to applying power to the operator.
Switch Function Setting Description
SW 1 (Top 8 Switches)
Primary
Operator
Opening
Direction
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
7-OFF
7-OFF
7-ON
7-ON
8-OFF
8-ON
8-OFF
8-ON
Auto-Close
Timer
Single Operator
Dual Operators
Circuit
Board
Relay
See next page for ALL 12 switch definitions and typical settings.
1
2
3
4
5
6
7 and 8
The output wired to terminal #4 becomes the output from the exit loop detector
plugged into the EXIT Loop port.
Normal Setting. Terminal #4 is a normal full open input.
Auto-close timer is OFF. Manual input required to close gate.
Normal Setting. Auto-close timer is ON. Adjustable from 1-23 seconds.
Normal Setting. Switch must be OFF for single operator.
Switch must be ON when primary/secondary (dual) gates are used.
Normal Setting. Relay activates when gate is at open limit.
(Shadow loop setting when used)
Relay activates when gate is not closed.
Relay activates when gate is opening and open.
Relay activates during opening and closing cycle.
Secondary
Operator
Opening
Direction
Reverses Gate
Not Used
Exit Loop Port
Output
Full Open Input
Normal Setting. Input to terminal #6 and reverse loop will stop and reverse gate to
the full open position during the close cycle ONLY.
Do Not use this setting for the 6550.
Opens Counter-Clockwise using OFF setting.
Opens Clockwise using ON setting.
Opens Counter-Clockwise using OFF setting.
Opens Clockwise using ON setting.
Switch Function Setting Description
SW 2 (Bottom 4 Switches)
Normal Setting. Switch 3 MUST be turned OFF for Model 6550 operator.
Normal Setting. Switch 4 MUST be turned OFF for Model 6550 operator.
OFF
ON
OFF
ON
OFF
OFF
Magnetic lock
1
2
3
4
Normal Setting. Magnetic lock is not used.
Magnetic lock is used and connected to terminals 9 and 12. See page 27 for wiring.
Gate Overlap
Primary and secondary operators start at the same time (Normal setting for single
gate operator).
The secondary operator will start 1.5 sec. before primary operator during open
cycle and the primary operator will start 1.5 sec. before the secondary operator
during the close cycle (Normal setting for bi-parting gate operators).