Carmanah R820 User manual

OWNER’S MANUAL
Solar-Powered LED Pedestrian Crosswalk
Flashing Beacon - Model R820
© July 13, 2006, Carmanah Technologies Inc.
www.carmanah.com
Technical Support: customerservi[email protected]
Toll Free in North America: 1-877-722-8877
International: [phone] | Fax: [phone]
R820 - 36983

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
3
Table of Contents
1.0 INTRODUCTION...................................................................................................4
2.0 COMPONENT IDENTIFICATION..........................................................................5
3.0 CONFIGURATION & INSTALLATION INSTRUCTIONS.......................................6
3.1 C HOOSING AND P REPARING A S UITABLE L OCATION FOR I NSTALLATION ..............6
3.1.1 Optimal Solar Location.................................................................................6
3.1.2 Minimum Distance between Systems...........................................................6
3.1.3 Preparing the Pole Mount ............................................................................6
3.2 C ONFIGURING THE S OLAR E NGINE P RIOR TO I NSTALLATION ...............................7
3.2.1 Preparing the Bird Deterrents and Antenna for Installation...........................7
3.2.2 Temporarily Connecting System Pieces to Configure System......................8
3.2.3 Primary/Secondary Channel Selection.........................................................8
3.3 C ONFIGURING THE F LASH D URATION AND T IMER D ELAY .....................................9
3.3.1 Factory Flash and Timer Delay Settings.....................................................10
3.3.2 Battery Connection, Customized Flash Duration and Timer Delay.............10
3.4 P REPARING R820 C OMPONENTS FOR F IELD I NSTALLATION ..............................12
3.4.1 Using a New Pole, Wiring the R820 Button................................................13
3.5 I NSTALLING THE R820 ON A P OLE OR M AST A RM .............................................13
3.5.1 Selecting the Poles....................................................................................13
3.5.2 Using an Existing Pole, Wiring the R820 Buttons.......................................13
3.5.3 Mount the Solar Engine..............................................................................14
3.5.4 Install the Signal Heads .............................................................................15
4.0 SYSTEM MAINTENANCE...................................................................................16
5.0 SERVICE AND PRODUCT INFORMATION........................................................17
5.1 S ERVICE .........................................................................................................17
5.2 A DDITIONAL P RODUCTS ..................................................................................17
6.0 APPENDIX A: PRODUCT SPECIFICATIONS ...................................................18

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
4
1.0 Introduction
The Model R820 solar-powered flashing beacon increases the visibility of pedestrians using
uncontrolled crosswalks. A typical installation consists of two pairs of flashing beacons, each
mounted on poles at opposite ends of the crosswalk. Pedestrians activate the R820 solar
roadway lights by pressing a button installed on either pole. The two units communicate with each
other using radio signals. On each pair of lights, one light is flashing towards traffic approaching
the crosswalk from each direction. Coming from either direction, drivers will see two flashing
lights, one on each end of the crosswalk. When activated, drivers will see a “bouncing-ball effect”,
with lights flashing on alternate ends of the crosswalk. The R820 system can accommodate
additional beacons, either in the median, overhead, or in advance of the crosswalk.
Since the R820 operates entirely by solar power, connecting to grid power is unnecessary. In
addition, wireless communication between units means that the R820 requires no trenching of
cables across the roadway. The R820 solar-powered roadway light is designed to operate reliably
under all environmental conditions with no scheduled maintenance for up to 5 years.
WARNING: The R820 is a warning beacon and is intended to be used as a supplemental
emphasis to warning signs located at uncontrolled marked crosswalks, as specified in the
2003 Manual of Uniform Traffic Control Devices, Chapter 4K . It is not a traffic control
device. It is the responsibility of the pedestrian to ensure traffic has stopped before entering
the crosswalk; this is clearly noted on the information plate mounted with the activation
pushbutton. The R820 is only a supplement for an uncontrolled marked crossing.
WARNING: Exercise caution when handling the battery packs. They are capable of
generating enormous short-circuit currents. Remove all jewelry (bracelets, metal-strap
watches, rings) before attempting to handle or remove the battery packs.

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
5
2.0 Component Identification
1. LED Signal Module
2. Polycarbonate Signal Head
3. Solar Engine
4. Antenna Assembly
5. Bird Deterrent
6. Pole (not included)
7. Push-Button Mounting Plate
8. Push-Button
9. Push-Button sign
10. Sign (not included)
11. Top Brackets (optional)
12. Bottom Brackets (optional)
2 .
3
4
11 11
6
2
2
1
1
2
3
4
10
8
7
6
9
5
12 12

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
6
3.0 Configuration & Installation Instructions
Installing the R820 is a quick and relatively smooth procedure that can normally be carried out by
existing road maintenance crews. The installation instructions in this manual are divided into
three parts: choosing a location, unit configuration and pre-wiring in the shop, and field
installation. Please read this manual to determine what tasks should be completed in the shop
prior to the field installation portion of the job.
Required Tools:
•Socket Set
•Crescent Wrench
•Tap and Die Set
•#2 Phillips Screwdriver
•5/32” Allen Key
•Fish Tape
•12-15 ft Ladder
•Level
•Compass
3.1 Choosing and Preparing a Suitable Location for Installation
Likely a suitable location will already have been selected
at the time of order. However, please ensure that each
of the criteria outlined in this section have been met
before proceeding with the installation.
3.1.1 Optimal Solar Location
As the Carmanah Model R820 is a solar-powered
device, it is critical to position the unit in relation to the
optimum angle of the sun in order to achieve maximum
solar power generation.
To do this, the Solar Engine must ideally be installed in a
non-shady location where it can be angled towards the
equator for maximum solar exposure during daylight
hours. See section 3.5.3 for more details.
3.1.2 Minimum Distance between
Systems
Figure 1 shows the minimum distance that must be
maintained between independent systems using the
same radio channel. If independent systems are required to be located
less than 300 meters from each other the radios in each independent
system MUST be set to different channels.
Please refer to section 3.2.3 for information on setting the radio channel.
3.1.3 Preparing the Pole Mount
The R820 lights are mounted on a pole that will be most likely be affixed to a base with the
necessary mounting hardware. If concrete foundations will be used, concrete bases will need to
be poured before the installation of the system. See Figure 2.
Figure 2: Concrete Base
Figure 1: Minimum Spacing Between Two
Systems Using the Same Radio Channel

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
7
3.2 Configuring the Solar Engine Prior to Installation
R820 solar roadway beacons should be configured before being installed at the selected location.
This is especially important when installing multiple R820 units as the job can be divided between
shop and field time.
3.2.1 Preparing the Bird Deterrents and Antenna for Installation
There are two items attached to the Solar Engine: bird deterrents
and an antenna. Both items are shipped with the R820 solar
roadway light. The small deterrents discourage birds from using
the R820 as a perch.
The antenna broadcasts or receives the radio signal to ensure
each of the R820 beacons act as a system. The antenna is
shipped inside the Solar Engine component when it comes from
the factory. As shown in Figure 3, the antenna is wrapped in foam
and placed on the left side of the enclosure.
To set up the external pieces attached to the Solar Engine,
complete the following steps:
1. Identify the three bird deterrents and set aside.
2. Remove the cover with the solar panels from the top of
the Solar Engine.
3. Attach each of the three bird deterrents, included with
the R820, to the top of the solar panel via the pre-drilled
holes. Ensure the solar panels remain as clean as
possible.
4. Detach the co-axial cable from where it is connected
inside the Solar Engine, and remove and unwrap the
attached antenna.
5. Remove the mounting screw for
the antenna bracket, located on
the side of the Solar Engine.
6. Insert the co-axial cable through
the hole in the side of the Solar
Engine, and carefully thread the
co-axial cable onto the gold
colored fitting on the electronics
enclosure from where it was just
removed it.
7. Pull the cable through the hole
and position the antenna bracket
over the mounting screw hole on
the side of the Solar Engine.
8. Use the mounting screw to attach
the antenna bracket to the Solar Engine.
Figure 2: Bird Deterrents
Figure 3 (top): R820 as shipped from the factory.
Figure 4 (bottom): Antenna Assembly
Antenna wrapped in
foam
Co-axial
cable
Antenna

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
8
3.2.2 Temporarily Connecting System Pieces to Configure System
To configure the flash duration and timer delay, the R820’s button, signal heads and batteries
must be temporarily connected.
1. Carefully unwrap the three wires
running from the mounting tee
located on the bottom of the Solar
Engine.
2. Remove the button assembly from
the button mounting plate.
3. Attach the button wire from the
Solar Engine to the button
contacts.
4. The button wire has two ring
terminal connectors.
5. Connect the remaining two wires
to the two signal heads.
Note: The signal head
connections use Molex
quick connectors.
3.2.3 Primary/Secondary Channel Selection
The channel chosen for each system must be the same in each unit of that system. Five channel
switches give the possibility of 32 unique channels as shown in Figure 9, below. Each R820
system is shipped set to a factory default of one Primary and one or more Secondary, all at
Channel 0.
Note: If the settings require changing at a later date, the batteries must be unplugged and then
reconnected after the system is reconfigured for the new settings to take effect, as the system
Figure 5: Button Connector Wires
Figure 6: Button
Mounting Plate
Figure 7: Button Contacts
Figure 8: Signal Heads

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
9
reads the settings only upon power-up. It is recommended that configuration occur when the
batteries are unplugged to minimize any potential safety hazard.
Note: For a system (two or more units) there must be only one primary – the remaining units in
the system must be configured as secondary.
To set the channels for each system:
1. Remove the logic card housing cover located between the two
batteries (See Figure 10).
2. The DIP switches are located on the logic card and has eight
individual switches (See Figure 11).
•Switch 1 is used to configure the unit as a
Primary or a Secondary. “ON” position is
PRIMARY. “OFF” position is SECONDARY.
•Switches 2 and 3 are not used.
•Switches 4 through 8 are used to set the
channel.
3.3 Configuring the Flash Duration and Timer Delay
The customer can select the length of time the lights should flash after each button press and an
optional delay time between uses. This is done in the first five (5) minutes following power-up of
Figure 9: Channel Selection
Figure 11: DIP switch
settings indicating a
Primary unit on channel 0
Figure 10: Logic
Card Housing

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
10
the system. If the customer does not attempt to enter the configuration mode upon power-up, but
simply presses the button, the previously stored settings will be utilized.
Each of the R820 units in a crosswalk installation must be configured individually, with the same
settings. After product configuration is completed, the settings are stored in non-volatile memory.
If the batteries are re-connected, and no change in configuration is desired, the product will
continue to operate with its previous settings. The R820 system has two user-configurable
parameters:
Flash Duration - The amount of time the light will flash after each button press by a pedestrian.
The flash duration is set in 5-second increments, up to one minute. This command sequence sets
the length of time the system will flash after one button press, and should consider the length of
time it will take a pedestrian to cross the street.
Timer Delay - The amount of time the light will delay between uses before accepting a new
button press. The delay is set in 5-second increments, up to one minute. If the delay is set to 0, a
button press while the light is flashing causes the light to restart its timer at the time of the button
press (the light will flash for "flash duration" seconds after the new button press).
3.3.1 Factory Flash and Timer Delay Settings
The default factory configuration is a 20 second flash duration with a zero second delay between
activations. What this means is, if a second pedestrian should press the button while the light is
flashing, the light will flash for 20 seconds starting from the moment the button is pressed.
To customize the flash duration and timer delay, follow the
instructions provided in the next section.
3.3.2 Battery Connection, Customized Flash
Duration and Timer Delay
The R820 ships with two battery packs that are disconnected
for shipping. Configuration of flash duration and timer delay is
performed during the five minutes immediately following
battery connection. Battery connection is as outlined below:
1. Find the two connection wires from each battery pack:
the longer terminating with a male connector, and the
shorter terminating with a female connector.
2. With the bases of the batteries facing the person doing
the installing, attach the long harness (male) of the left
side battery to the short harness (female) of the right
side battery.
3. Attach the long harness (male) from the right hand battery to the “Battery” connection on
the PCB harness end of the battery nearest to the end of the PCB connectors. The short
harness (female) from the left hand battery will remain unused.
4. The flash duration and timer delay for the system are now ready to configure as per the
table below:
Figure 12:
Left side battery pack
showing short (female) and long
(male) leads

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
11
Setting the Flash
Duration
a) Press and hold the button for ~3 seconds. (until you see the
unit quickly flash twice).
b) Each subsequent button press adds 5 seconds to the flash
duration stating at zero, i.e. 1 press = 5 seconds, 2 = 10
seconds, etc., to a maximum of 12 presses for 60 seconds.
Further presses will not increase the time beyond 60 seconds.
Setting the Timer Delay
Note: Steps a) and b)
above must be completed
before setting the timer
delay. The process cannot
be initiated at c).
c) Press and hold the button for ~3 seconds (until the light flashes
quickly 4 times) to access the next command sequence.
•For zero seconds delay, go to Step d).
•Each subsequent button press adds 5 seconds to the flash
duration starting at zero i.e. 1 press = 5 seconds, 2 = 10
seconds, etc., to a maximum of 12 presses for 60 seconds.
Further presses will not increase the time beyond 60
seconds.
d) Press and hold the button for ~3 seconds (until the light flashes
quickly 6 times).
e) The light is now set to the new values and will demonstrate its
settings. If the new values are incorrect, you can repeat starting
from Step a) within 30 seconds.
Resetting Factory
Default Settings
Once the batteries are connected in Step 4 above:
a) Hold the button for ~10 seconds (the light will flash once after 3
seconds, then several times after 10 seconds).
b) The light is now reset to the factory default and will demonstrate
its settings.
Note: If the newly set values are not what are desired, the system
will allow 30 seconds to either reset the unit to factory defaults or
enter user configurable parameters.
Note: If the user is in the Flash Duration Setting mode and holds the button for 3 seconds (i.e.
tries to bypass the flash duration setting mode), the lights will flash 6 times and exit from the
programming mode. The pattern displayed will be the previously programmed configuration.
Note: If two units with different user parameter settings are utilized in the same system, the unit
that has its button pressed will determine the duration and delay for both units.
Figure 13: Battery Connectors

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
12
3.4 Preparing R820 Components for Field Installation
Now that the Solar Engine is configured, it must be prepared for installation:
1. Carefully re-install the logic card
housing cover located between the two
batteries. Ensure that the foam rubber
gasket on the underside of the cover is
positioned over the wires exiting the
logic card.
2. Connect the solar panel wires located
on the underside of the solar panel
cover to the female connector with one
red and two black wires going into the
logic card housing.
3. Re-install the cover with the solar panels
on the top of the Solar Engine. Ensure
the notch in the top cover mates with the
antenna mount.
4. Disconnect the button and the signal
heads and carefully recoil the wires
exiting the mounting tee located on the
bottom of the Solar Engine.
5. The R820 Solar Engine is now ready for
installation on the pole.
Figure 15: Solar
Engine Assembly
Figure 17
: Solar
Engine Assembly
with wires connected
Figure 16: Solar Engine top cover
showing notch for antenna
assembly
Figure 14: Logic Card Housing Cover

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
13
3.4.1 Using a New Pole, Wiring the R820 Button
If a new pole will be used in the installation, the holes for the R820 button hardware can be drilled
while the poles are in the shop prior to field installation. Follow the instructions provided in
section 3.5.2 to mount the button plate.
3.5 Installing the R820 on a Pole or Mast Arm
Note: As outlined in Section 3.1.3, ensure the concrete foundation with the necessary mounting
hardware has been poured prior to pole installation.
3.5.1 Selecting the Poles
Typically, a 10-foot “Type 1” pedestrian pole is used for the
installation. A “Type 9” with the mast arm for over the road
configuration, or any other pole that has a 4” to 4.5” OD top cap,
can also be used.
Note: If you use a 4” OD Pole, you will need longer bolts than
those provided.
3.5.2 Using an Existing Pole, Wiring the R820
Buttons
Note: ADA regulations specify that the button should be 42” from the
ground.
1. Tap the screw holes, and then file the edges to avoid
damaging the wires during installation.
2. Next, attach the button plate and the
button sign to the pole using a
socket set to tighten the bolts.
3. Use a fish tape to run the wires from
the solar head to the button.
4. Carefully thread the button wire through the mounting pole. (Figure 22).
Figure 18: OD Pole
Figure 19: Button Plate
Figure
20: Screw Holes
Figure 22: Mounting Pole & Wire
Figure 21: Push-button plate and sign (right)

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
14
5. Attach the button wires from the solar engine to the button contacts. This is the long
harness with the two ring terminals.
3.5.3 Mount the Solar Engine
Two installers without the use of a bucket truck can complete the
final step in the installation of the R820.
Note: If you are using a 4” OD pole, you will need longer bolts than
those provided.
1. Simply attach the Solar Engine to the pole and finger-tighten
the bolts.
2. Next, using two installers, stand the pole up and set onto the
mounts.
3. Bolt the pole to the mounting hardware already poured in the
concrete base.
4. Position the Solar Engine so that the unit achieves maximum
solar power generation by angling the solar panel towards
the equator and tipping it upwards at an angle equal to the
latitude of the
geographical location
of the installation plus
5 degrees. (For
example, Seattle, WA
would require that the
solar panel point
south at an angle of
54 degrees up from
the horizon (49 degrees Latitude plus 5
degrees)).
Figure 24: Button Figure 25: Button Plate
Figure 26: Solar
Panel Assembly
Figure 27: Pole
Installati
on
Tilt the Solar
Engine
Rotate the
Solar Engine
on the Pole
Figure
28
: Adjusting the Solar Engine so that
the Solar
Panels Face the Equator

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
15
3.5.4 Install the Signal Heads
1. Install the signal head housing onto the upper support arm.
2. Connect the signal wire from the Solar Engine to the LED module.
3. Attach the bottom brackets then level the solar head and tighten the top cap bolts. The
bottom brackets can be affixed with bolts or stainless steel straps.
4. Next, tighten the setscrew on the cap and position the lenses towards oncoming traffic.
5. Tighten the bolts inside the signal heads.
6. Attach the crosswalk signs to the poles.
Figure 2
9
: Signal Head
Figure
30
: Bottom
Brackets

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
16
4.0 System Maintenance
Although the system is designed to be maintenance free, large performance gains can be made
with clean solar panels and lenses.
Maintenance Type Instructions
Cleaning: Yearly Use water and a soft sponge or cloth for cleaning and a mild, non-
abrasive cleaning agent for more stubborn residue. Rinse well.
Pressure washers should not be used (water forced up into the
louvers may soak internal components).
Note: Clean solar panels more frequently during drier months, as
they may become soiled more quickly.
Inspection: Yearly 1. Check all electrical and mechanical connectors yearly to ensure
they are clean, secure and undamaged.
2. The main battery housing has several vents and drain holes.
Ensure that they are free of debris.
3. Visual inspection – check over exterior assembly for cracks,
missing or broken hardware or other potential problems.
4.1. Troubleshooting
There are two faults that may occur with the R820 that will prevent the light from flashing:
1. Check the battery connection and the LED array connection to ensure that the
connectors are fully inserted. As the light is designed to function as soon as the battery
is plugged in, this should be fairly simple to diagnose.
2. IF SO EQUIPPED: Certain units have batteries that
utilize inline fuses. In the case of system malfunction,
open the inline fuse holder (pictured left), and check the
state of the fuse. If the interior filament is intact, the fuse
itself is functional, otherwise replace fuse with
Cooper-Bussman model ABC-4 (4-amp fuse).
If your R820 flasher still refuses to operate correctly, contact Carmanah Technologies Corp. at
877-722-8877 or contact your distributor.

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
17
5.0 Service and Product Information
5.1 Service
Before contacting Carmanah’s customer service department, please have the serial number of
the Model R820 available, a brief description of the problem, as well as all details of the
installation.
Carmanah products are covered by a standard 3-year pro-rated warranty. A warranty card is
supplied with each unit. The warranty can also be viewed online at:
http://www.carmanah.com/content/products/warranty/
Mail: Carmanah Technologies Corp.
Building 4, 203 Harbour Rd.
Victoria, BC Canada V9A 3S2
Phone: + [phone]
1 [phone] (Toll Free in Canada & U.S.)
Fax: + [phone]
Email: [e-mail]
Website: www.carmanah.com
5.2 Additional Products
Carmanah offers a variety of solar-powered and energy efficient LED lighting products. For
roadway applications, Carmanah also manufactures solar 24 hour flashing beacons and school
zone flashers, as well as LED internally illuminated street-name signs and traffic signs. For more
information, please visit our website at: www.roadlights.com.

Owner’s Manual | Model R820
Carmanah Technologies Inc. Copyright © 2006
Document number: MAN_ROAD R820 Owner's Manual 36983_vB
Last revised: November 7, 2006
18
6.0 Appendix A: Product Specifications
Light Output
Daytime Effective Intensity, Flashing 570 Cd
Daytime Peak Intensity 800 Cd
Nighttime Effective Intensity, Flashing 285 Cd
Nighttime Peak Intensity 400 Cd
Average Day Range 0.5 mi/0.75km
Operation
Daily Operational Profile 2 hrs. Continuous or intermittent
Example: 300 activations daily at 20 sec. per activation
Required Solar Isolation for 2 hrs.
Daily Operational Profile
Continuous Operation Without Sun 30 Days minimum
Lifespan of LEDs Up to 100,000 hrs.
Color Output Yellow
Dominant Wave Length 590 nm
Flash Pattern/On Time/Off Time 0.55s/0.55s(MUTCD Compliant
“Bouncing Ball”
Battery Capacity 400 Whr.
Lens
Colors Yellow (ITE compliant)
Material 8” or 12” polycarbonate is hard coated
for abrasion
Communication
RF Transmission 900 MHz (Frequency hopping spread
spectrum)
Transmit Output Power Less than 100 mW
Effective Range 165 ft./50 m/line of site operation
Antenna Type Omni-directional dipole
Maximum Number of Independent Systems 64
Operating Temperatures
Optimal Ambient Range -4°to 77°F (-20°to +25° C)
Maximum Ambient Temperature Range -40°to 176°F (-40 to +80°C)
Storage Temperature 68°+/- to 5°F (20°+/- 5 °C)
Housing
Head and Support Structure Powder coated aluminum
Signal Housing Injection Molded UV stabilized
polycarbonate
Switch Die-cast aluminum with a 2” ADA
compliant polycarbonate button
Trademark and Patents Pending
US Patent No. 6,573,659