Sentex SW470 User manual

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Installation and
Maintenance Instructions
Medium & Heavy Duty
Swing Gate Operators
Models: SW470
SW490

2Contents
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Contents
General Information ____________________________________________ 4
Parts Supplied ___________________________________________________________ 4
Model Classifications _____________________________________________________ 4
Specifications ___________________________________________________________ 5
Safety Information ______________________________________________ 6
Safety Instructions________________________________________________________ 6
Safety Precautions for Swing Gates and Ornamental “Grill Type” Gates _____________ 8
Preparing the Installation ________________________________________ 9
Pre-Installation Check List _________________________________________________ 9
Wiring Specifications _____________________________________________________ 9
System Features_________________________________________________________ 10
Installation ___________________________________________________ 12
Post Mount for SW470 Operator Only _______________________________________ 12
Pad Mount Installation ___________________________________________________ 13
Control Arm Assembly ___________________________________________________ 14
Gate Bracket Installation__________________________________________________ 16
Limit Switch Adjustments_________________________________________________ 17
Electrical Power Connections ______________________________________________ 18
Programming _________________________________________________ 19
Switch #1: Operator Programming __________________________________________ 19
Switch #2: Timer to Close_________________________________________________ 20
Controls and Accessory Install. ___________________________________ 21
Manual Operation and System Check-Out __________________________ 22
Manual Gate Operation ___________________________________________________ 22
Preliminary System Check Out_____________________________________________ 22
Required Maintenance – Normal Usage ____________________________ 23
Troubleshooting _______________________________________________ 24
SW470 Parts List and Drawing ___________________________________ 25
SW470 Parts List________________________________________________________ 25

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SW470 Exploded View___________________________________________________ 26
SW490 Parts List and Drawing ___________________________________27
SW490 Parts List________________________________________________________ 27
SW490 Exploded View___________________________________________________ 29
Warranty Policy _______________________________________________30
IMPORTANT!
Please leave this manual at the job site, preferably with the end user or facility
manager. Read and follow all instructions.
This gate operator is intended for use on a gate that swings in an arc in a horizontal
plane.

4General Information
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General Information
Parts Supplied
Inspect the operator for any possible shipping damage and any shortage of parts.
Please note that if accessories were ordered with this unit, some may be packed
separately.
PART # DESCRIPTION QTY. PART # DESCRIPTION QTY.
SW470 Powerhead 1 02-103 3-button control station 1
02-103 3-button control station 1 08-2001 Pipe holders 2
07-1202 Nut plate 1 10-2006 Control arm extension 1
10-2108 Control arm extension 1 10-2011 Gate bracket 1
10-2109 Actuator arm 1 10-3900 Pipe, 1 x 39” 1
10-2111 Gate bracket 12-9057 Bushing, ¾ 2
80-2103 Hand screw; ¼ -20 2 82-HN75-
28 H.H. bolt, ¾ -10 x 3 2
82-HN38-
10
H.H. bolt, 3/8 –16 x 1-
½ 2 82-HN38- 16 H.H. bolt, 3/8 –16 x1 2
82-SB50-
08 Shoulder screw, ½ 2 82- NH38006
Set screw, 3/8 –16 x
3/8 4
84-RH-25 Hex nut, ¼ -20 2 84-RH-75 Hex nut, ¾ -10 2
84-RH-38 Hex nut, 3/8 –16 2 85-FW-75 Flatwasher 6
85-LS-38 Flatwasher, 3/8 2 85-LS-38 Lockwasher, 3/8 2
02-4015 Stop button 1 85-LS-75 Lockwasher, ¾ 2
SW490 Powerhead 1 02-4015 Stop button 1
Table 1: Parts Supplied
Model Classifications
RESIDENTAL VEHICULAR GATE OPERATOR – CLASS 1
A vehicular gate operator or system that is intended for use in a home of one to
four single family dwelling or a garage or parking area.
COMMERCIAL/GENERAL ACCESS VEHICULAR GATE OPERATOR –
CLASS 2
A vehicular gate operator or system intended for use in a commercial location or
building such as a multi-family housing unit of five or more single family units, hotel,
garages, retail store, or other building servicing the general public.

General Information 5
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INDUSTRIAL/LIMITED ACCESS VEHICULAR GATE OPERATOR –
CLASS 3
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 4
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
location not servicing the general public, in which unauthorized access is prevented
via supervision by security personnel.
MODEL CLASS 1 CLASS 2 CLASS 3 CLASS 4
SW470 ÄÄÄÄ
SW490 ÄÄÄÄ
Table 2
Specifications
Model HP Max. Wt. (Lbs.) Max. Gate Width
SW470-50 ½ 500 12 FT.
SW490-33 1/3 600 12 FT.
SW490-50 ½ 750 16 FT.
SW490-75 ¾ 900 19 FT.
SW490-100 1 1000 22 FT.
Table 3

6Safety Information
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Safety Information
Vehicular gate systems provide convenience and security. Gate systems are comprised
of many component parts. The gate operator is only one component. Each gate system
is specifically designed for an individual application. Gate operating system designers,
installers and users must take into account the possible hazards associated with each
individual application.
Improperly designed, installed or maintained systems can create risks for the user as
well as the bystander. The design and installation of gate systems must reduce public
exposure to potential hazards.
A gate operator can create high levels of force, in its function as a component part of a
gate system. Therefore, safety features must be incorporated into every design.
Specific safety features include:
Gate Edges Enclosed Track Vertical Posts
Guards for exposed
rollers
Photo-electric
Sensors
Instructional and
Precautionary Signage
Screen Mesh
Important instructions follow. These instructions are intended to highlight certain safety
related issues. These instructions are not intended to be comprehensive. Because each
application is unique, it is the responsibility of the purchaser, designer, installer and end
user to ensure that the total gate system is safe for its intended use.
Safety Instructions
Selected Instructions are highlighted with a precautionary symbol (see left margin).
Failure to follow these selected instructions can result in serious injury or death.
STEP 1: BEFORE INSTALLATION
1 Confirm gate operator model is specified by Installation and Maintenance
Manual for application type, gate size and frequency of use.
2 Confirm ALL appropriate safety features, such as gate edges, photo-electric
sensors, vertical posts and enclosed tracks, are specified.
3 Confirm the gate system design reduces pinch points and protects against
entrapment.
4 Confirm gate system design has pedestrian access separate from vehicular
entrance.
5 Confirm gate system design reduces traffic backup.
6 Confirm warning signage is included in design.
7 Confirm gate moves freely before installation of operator.
8 Repair or service worn or damaged gate hardware before installation of
operator.
9 To avoid installation hazards, review the gate system operation and
installation procedures, such as manual disconnect mechanism procedure.
10 Confirm control design prohibits unauthorized use.

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STEP 2: DURING INSTALLATION
1 Disconnect power at service panel before making any electrical connection.
2 Avoid pinch points; be aware of all moving parts.
3 Adjust clutch or load sensing device to minimum force setting.
4 Do not overtighten clutch or adjust force setting above minimum.
5 Install controls where user cannot touch gate while operating controls.
6 Install two or more warning signs on the gate to alert persons in the area of
automatic gate operation. Warning signs must be conspicuous.
7 Install operator inside fence line. DO NOT install operator on public side of
fence line.
8 Secure gate operator cover.
STEP 3: AFTER INSTALLATION
1 Test all safety features.
2 Train end user about basic functions and safety features of gate system.
3 Leave Installation and Maintenance Manual and Safety Information with end
user.
FOR GATE OPERATORS USING NON-CONTACT SENSOR(S)
See instruction supplied with sensor for proper placement.
Precautions must be taken to reduce the risk of nuisance tripping of the
sensor.
If there are multiple areas of risk of entrapment or obstruction, then more
than one sensor should be incorporated into the system.
FOR GATE OPERATORS USING CONTACT SENSOR(S)
One or more sensors shall be located as shown on page 8.
Care must be taken during the wiring of the sensor(s) to the operator. Make
sure that the wiring cannot be damaged or interrupted.
When using a sensor with a gate edge transmitter, care must be taken to
insure that the RF signal is not interfered with or obstructed.
SECONDARY ENTRAPMENT PROTECTION
It is recommended that secondary safeties always be used for both the open and
close directions. Use photo eyes, safety edges or both. In any case, the device
must sense people. Loops cannot be used.

8Safety Information
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Safety Precautions for Swing Gates and Ornamental
“Grill Type” Gates
ENTRAPMENT ZONES
Pedestrians must stay clear of the gate path, particularly the area where the gate
can trap them, as shown in Figure 1.
01-G0610F3
Figure 1
Gate edges and/or photo-electric beams must be incorporated into the swing gate
system to assist in the protection of people who may come near the gate operating
system.
Also, injuries can occur when people put their hands and arms through openings in
a grill type gate and it is operated. This potential hazard can be averted by placing
a screen mesh on the gate to prevent access through the openings. See Figure 2.
Photo-Electric Beam
Screen Mesh
Gate Edge
01-G0610F4
Gate Edge on Leading Edge of Gates
Always test Gate Edges and
Photo Beams anytime they are
adjusted or serviced.
Figure 2

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Preparing the Installation
Pre-Installation Check List
 Check the gate. It must operate smoothly and freely. If necessary, lubricate the
hinges, adjust or repair the gate prior to operator installation. The gate must be
level.
 Double check the size and weight of the gate to make sure that it is proper for
this application.
 If wiring has already been installed, check to make sure it meets the following
specifications.
Wiring Specifications
Refer to Table 4 and Table 5 for wiring specifications.
A. The distances shown are
measured in feet from the operator
to the power source.
B. These calculations are based on
the National Electrical Code and
allows for a 5% voltage drop.
C. Supply voltage must be within 10%
of the operator’s rating under load
conditions.
D. These calculations are based on
stranded copper wire.
E. It is highly recommended that only
90% of the distances shown be
used; this will allow for a 10%
safety factor.
F. For dual units, the distance shown
should be cut in half.
G. All local codes must be strictly
adhered to. It is very important that
operator is properly grounded.
H. Do not run control wires in the same
conduit with power wires.
I. Do not run multi conductor or parallel
conductor cable for controls.
J. All power wiring should be dedicated
and protected.
CONTROL WIRING
VOLT MAX. DISTANCE WIRE GUAGE
24 1000 18
Table 4: Control Wiring Chart
NOTE: Calculated using NEC guidelines. Local codes and conditions must be
reviewed for suitability of wire installation. Master/Slave units must be installed on
separate circuits.

10 Preparing the Installation
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Single Phase 3 Phase
115 VAC 230 VAC 230 VAC 460 VAC 575 VAC
AWG Maximum wire length in feet for 1/3 HP motor
6 700 3,100 4,750 14,225 35,550
8 450 1,950 3,000 8,975 22,425
10 275 1,225 1,900 5,650 14,075
12 175 775 1,175 3,525 8,825
AWG Maximum wire length in feet for ½ HP motors
6 475 2,075 2,850 14,225 17,775
8 300 1,300 1,800 8,975 11,225
10 200 825 1,125 5,650 7,050
12 125 525 725 3,525 4,425
AWG Maximum wire length in feet for ¾ HP motors
6 325 1,250 2,050 7,125 11,850
8 225 800 1,300 4,500 7,475
10 150 500 825 2,825 4,700
12 100 325 525 1,775 2,950
AWG Maximum wire length in feet for 1 hp motors
6 250 950 1,425 5,700 8,900
8 150 600 900 3,600 5,625
10 100 375 575 2,275 3,525
12 75 250 375 1,425 2, 225
Table 5: Power Wiring Chart
System Features
ACTIVITY LED
Steady indication when
gate is at either open or
close limit.
1 second flash when gate
is off a limit in normal
operation.
2 second flash when
entrapment level one has
occurred. 01-G0665F15
Figure 3
AUDIBLE WARNING DEVICE
If the operator should have a second inherent obstruction in sequence with the first;
i.e. back to back, the sounder will activate for 5 minutes then shut off. Also the
sounder can be programmed to come on 2 seconds prior to gate movement and
stay on during gate movement.

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THREE BUTTON CONTROL (SEQUENCE OF OPERATION)
Open, stop, close. Stop will override all other functions. If closing, open will cause
the operator to stop and reverse to full open. If opening, close will cause operator
to stop and reverse to full close position.
ONE BUTTON CONTROL (SEQUENCE OF OPERATION)
The one button control can be programmed to either function as described above
or to function as a close button only.
DIGITAL MICROPROCESSOR
This is the main circuit board for the operator. It contains all the logic and
intelligence for the system. All the system programming is done on this circuit
board. See page 21. All solid state, with an emergency back-up system that works
even if the processor is missing.
INHERENT OBSTRUCTION PROTECTION
The limit shaft is equipped with an R.P.M. sensor. When the gate meets an
obstruction, the loss of r.p.m’s will cause the gate to reverse. A second obstruction
will cause the gate to stop. A renewed wired input will restart the gate.
EXTERNAL OBSTRUCTION CIRCUIT
This circuit can be used with either a gate edge or a photo beam system. When
either of the tow devices mentioned are activated, the operator will react in a similar
manner to the inherent obstruction described above.
NOTE: If external entrapment protection is required by the class of
operator, both an open and close protection device must be used.
SPECIAL NOTE ABOUT OBSTRUCTION SENSING FROM EITHER
INTERNAL OR EXTERNAL SYSTEMS
The operator will stop if it senses two sequential obstructions. It will not activate
from any automatic system, including the built in time delay to close. Either a
manual device such as a pushbutton within site of the gate and operator, or the
stop button supplied with the operator must be activated to resume the operator
back to its normal operation.
OPEN ONLY CIRCUIT
Separate open circuits for line-of-sight devices and out-of-sight devices such as
open loops or radio controls.
LOOP CONTROL CIRCUITS
Vehicle control devices such as reversing loop detectors are connected to this
circuit.
TIME DELAY TO REVERSE CIRCUIT
Allows the gate to come to a complete stop before reversing direction.
Approximately ½ second between stop and reverse.
NOTE: This feature is defeated when either the inherent or external
obstruction circuits are activated.

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Installation
In order for the gate operator to function correctly it is important that the gate be level
and swing smoothly and freely. If it does not, damage to the operator may result and
the life expectancy will be greatly reduced.
SW470 gate operators have provisions for both post and pad mounting. However,
because of the high torque involved in most swing gate installations, pad mounting is
the recommended method.
NOTE: Instructions are for right hand operator installation. Left hand is opposite.
01-G0665F1
Figure 4
Post Mount for SW470 Operator Only
1 Locate mounting post and electrical conduit locations. The operator cabinet
may be installed either parallel or perpendicular to the fence.
2 Excavate required areas for conduit installation and mounting posts.
3 Set mounting post and electrical conduit in place. Knockouts for 3” pipe clamps
(not supplied) are provided in the operator.
NOTE: Distance between mounting posts and the relative location to gate
is very important.
4 Pour cement to secure mounting posts and allow to set for two days before
installing power unit.
01-G0665F16
Figure 5

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Pad Mount Installation
1 Lay out the concrete pad as detailed. Concrete depth should be below frost
line or as required by local codes. Operator cabinets may be installed either
parallel to the fence, the SW470 only perpendicular to the fence.
CAUTION
Be sure that the measurements for the operator mounting are from the
centerline of the fence and centerline of gate hinge.
2 Locate electrical conduit, as required, prior to pouring concrete.
3 Pour concrete, insuring that pad is level and above ground line.
4 Locate (4) ½” X 6” minimum length L-Bolts (not supplied). These should
protrude (1) inch above pad.
5 Allow concrete to set at least two days before installing power unit.
6 After concrete has set, carefully secure operator to concrete pad, in correct
relative secure operator to concrete pad, in correct relative position. The L-
Bolts will protrude through the holes in the mounting flanges and should be
secured with hex nuts and lockwashers (not provided).
It is very important that the operator is level and parallel to the gate.
DIMENSION TABLE
A B C D
SW470 9-3/4” 22-1/2” 24” 8”
SW490 16” 28” 32” 8”
Table 6
01-G0665F2
Figure 6

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Control Arm Assembly
1 Set the control arm stops on the operator in the positions appropriate for the
model and installation. Then install the control arm and hub assembly to the
operator output shaft. Make sure key is inserted properly in keyway. Lock with
set screw.
01-G0665F17
Figure 7
2 Model SW490:
Attach control arm extension to control arm on operator with (2)
3/8-16 x 1” long hex head bolts and lockwashers. Use holes that are
appropriate for degree of gate opening required.
01-G0665F3
Figure 8
3 Assemble the (2) pipe holders, one to the gate bracket and one to the control
arm extension, using bushings, 3/4 –10 x 3” bolts and ¾” nuts, flatwashers and
lockwashers as shown in Figure 9.
Position the pipe into the pipe holders to complete the arm assembly. Insert (2)
hex head set screws in each holder to hold pipe firmly. Do not tighten until final
adjustment is made.

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01-G0665F4
Figure 9
4 Model SW 490: Attach control arm extension to arm hub with ¼ -20 hand
screws and nuts provided as shown in Figure 10. Place hub onto shaft with key
and lock on with set screw. Be sure rubber seal is on end of hub to keep water
out of bearing.
Assemble extension arm to control arm as shown in Figure 11. Be sure to keep
the extension arm with spot-faced side up. Use the holes that are appropriate
for desired degree of gate opening. The extension arm should swivel easily on
pivot screws when the nuts are tightened. Attach the other end of the actuator
arm to the gate brackets shown.
01-G0665F5
Figure 10

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Figure 11
Gate Bracket Installation
1 If required, install an angle (2” x 2” x ¼” by others) horizontally on the gate, at
the same height as the top surface of the control arm extension.
01-G0665F6
Figure 12
2 Adjust the eccentric stop as shown so that the wide area of the eccentric is
against the arm. Be sure that the control arm and actuator are in a straight line.
Install the gate bracket at the appropriate point on the gate (or angle, if used).
As an alternative on the Model SW470 only, (2) 3/8 – 16 bolts and a nut plate
are provided. Adjust arm length and then rotate the eccentric stop 180 degrees
so that the small thickness is against the arm. This will provide the necessary
deflection in the arm assembly to lock the gate.
01-G0665F8
Figure 13

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Limit Switch Adjustments
Limit switches are pre-adjusted at the factory and should require only slight adjustments
to suit individual installations. Refer to Figure 14 to identify limit switches.
CAUTION
Never make adjustments before making sure that power is off and that
operator direction is selected by dip switch #1, pin #2 for left or right hand
operation.
TO ADJUST CLOSE LIMIT SWITCH
1 Move gate to the desired fully
closed position by pushing the
arm and forcing the clutch to slip.
If the clutch is too tight, refer to
Clutch Adjustment selection
below.
2 Loosed set screw on close limit
cam.
3 Rotate the close limit cam in the
same direction as the shaft turns
to close the gate. Stop at the
point at which the cam just clicks
the limit switch.
4 Tighten set screw securely.
TO ADJUST OPEN LIMIT SWITCH
1 Move the gate to the desired
fully opened position by pushing
the arm against the clutch. If
the clutch does not slip, refer to
the Clutch Adjustment selection
below.
2 Loosed set screw on open limit
cam.
3 Rotate the open limit cam in the
dame direction as the shaft
turns to open the gate. Stop at
the point at which the cam just
clicks the limit switch.
4 Tighten set screws securely.
TO ADJUST AUXILIARY OPEN LIMIT SWITCHES
1 Maintain gate in open position.
2 Loosen set screw on auxiliary open limit cam.
3 Rotate the cam in the same direction as the shaft turns to open the gate.
Stop at the point at which the cam just clicks the limit switch and then
advance the cam approximately 1/8 to ¼ inch further. This will put the
auxiliary cam ahead of the open cam. When the gate is opening, the
auxiliary limit switch should energize approximately (2) seconds before the
open limit switch.
4 Tighten set screw securely.
01-G0665F9
Figure 14
OPERATOR
“HAND”
OPEN
LIMIT
CLOSE
LIMIT
Right B A
Left A B
Table 7

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Electrical Power Connections
CAUTION
Make sure power is disconnected at the main power source and at the
operator’s electrical disconnect switch before proceeding.
Secure all electrical power connections inside the power wiring compartment. Use the
electrical wiring diagram supplied with this unit.
All single phase operators will have – L1 (neutral), L2 (hot) and ground. All three phase
operators will have – L1, L2, L3 and ground. It is very important that operator is
properly grounded.
IMPORTANT NOTE:On three phase operators the power connections must be
properly phased. If they are phased wrong the gate operator will run
backwards. To correct this situation, disconnect power a main power source
and at the operator’s electrical disconnect switch. Then, reverse any two of the
three power leads.
01-0665F10
Figure 15

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Programming
01-G0665F11
Figure 16
Switch #1: Operator Programming
POLE #1 – SINGLE/CLOSE BUTTON
ON = Close button only
OFF = Open/Close Button
POLE #2 – RIGHT HAND/LEFT HAND
ON = Left Hand (gate will open to the left)
OFF = Right Hand (gate will open to the right)
(inside of fence looking out)
01-0665F12
Figure 17
POLE #3 – WARNING DEVICE
ON = Warning device will turn on 3 seconds before gate starts to move in either
direction.
OFF = Warning device disabled.
Timer to close is locked out at the factory, to activate the timer to close, move
safety jumper from bottom two pins (show illustration) to top two pins. Then set
time per the chart below. During normal operation, if the operator stops on a limit,
or mid travel, the operator will time out per the chart on page 20 (Table 8) and
automatically close. To lock the timer to close program and disable, simply return
the jumper to the bottom two pins, or turn on all pins of SW#2.
IMPORTANT NOTE: When using master/slave, only set the time for the master
operator. The slave operator must be set to disable position (all poles on).
POLE #4 – MASTER/SLAVE – SINGLE UNIT
ON = Master or single Unit
OFF = Slave unit
RED LED INFORMATION
Continuous ON = Unit is on a limit
Blinking 1 flash per second = Normal operation (gate travel or mid-stop)
Blinking 2 flashes per second = Entrapment level 1 (operator reverse to limit)

20 Programming
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POLE #1 POLE #2 POLE #3 POLE #4
TOTAL TIME
WARNING
DEVICE
DISABLED
TOTAL TIME
WARNING
DEVICE
ENABLED
ON ON ON ON DISABLED DISABLED
OFF ON ON ON 1 SEC. 4 SEC.
ON OFF ON ON 13 SEC. 16 SEC.
OFF OFF ON ON 26 SEC. 2 SEC.
ON ON OFF ON 40 SEC. 43 SEC.
OFF ON OFF ON 52 SEC. 55 SEC.
ON OFF OFF ON 65 SEC. 68 SEC.
OFF OFF OFF ON 78 SEC. 81 SEC.
ON ON ON OFF 104 SEC. 107 SEC.
OFF ON ON OFF 117 SEC. 120 SEC.
ON OFF ON OFF 129 SEC. 132 SEC.
OFF OFF ON OFF 141 SEC. 144 SEC.
ON ON OFF OFF 155 SEC. 158 SEC.
OFF ON OFF OFF 167 SEC. 170 SEC.
ON OFF OFF OFF 180 SEC. 183 SEC.
OFF OFF OFF OFF 194 SEC. 197 SEC.
Table 8
Switch #2: Timer to Close
Timer to close is locked out at the factory. To activate the timer to close, follow steps
below:
01-G0610F14
Figure 18
1 Move safety jumper from bottom two pins to top two pins. Then set time per the
chart above (Table 8).
2 During normal operation, if the operator stops on a limit, or mid travel, the
operator will time out per the chart below and automatically close.
3 To lock the timer to close program and disable, simply return the jumper to the
bottom two pins, or turn on all pins of SW#2.
IMPORTANT NOTE: When using master/slave, only set the time for the
master operator. The slave operator must be set to disabled position (all
poles on).