INSTALLATION AND INSTRUCTION MANUAL
360° LED Lights
251H Series
featuring the
All 4-LED lights are non-rotating. All 8-LED lights are rotating.
PLIT472 REV. - 1/20/12
Wiring Instructions
CAUTION: All of our DC powered warning lights are polarity sensitive. These
lights are polarity protected only if the appropriate fuse is used. All
wires connected to the positive terminal of the battery should be
fused at the battery for their rated load. Testing the light before
this fuse is properly installed will void the warranty on the light.
1. The black wire is the ground lead and should be connected to a good chassis ground.
2. The purple wire is used for High/Low power selection. Leave it disconnected for
constant high power. Connect it to Ground for constant low power. Connect it to
Ground through a switch for High/Low select.
3. Connect the red wire to the positive side of your power source (+12-24VDC) through
a switch and a 5 Amp fuse. Be sure to check your light for proper voltage.
High/Low Power Settings
There are 3 modes these lights can be set to work in:
By default all lights are set up for Manually Switched High/Low power. This means that you
can use the Purple wire to control whether the light operates under high power (day mode)
or low power (night mode):
• Constant High Power
• Constant Low Power
• Manually Switched High/Low Power
• High Power Only:
Cut the Purple wire short and tape it off.
• Low Power Only:
Connect the Purple wire to Ground.
• Manually Switched High/Low Power:
Connect the Purple wire to Ground through a switch.
BLACK
GOOD
CHASSIS
GROUND
RED
SWITCH
5 AMP
FUSE
CONNECT
TO +12 VDC
PURPLE
High/Low Power Select (Ground for Low/Open for High)
GREEN
Pattern Select - Touch and release to Ground
WHITE
Synchronization Wire
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Low Voltage Detection
(Rotating Models Only)
All of the beacons that have the rotational patterns also have low input voltage detection. With this
feature the beacon senses the input voltage and flashes a fast pattern (approximately 16 cycles
per second) to indicate to the user that the battery voltage is low (less than 10V). Once the input
voltage returns to normal (greater than 12V) the unit will return to the normal flashing.
Pattern Programming
1. Setting the flash pattern of your
light can be performed using the
green wire.
2. If you will NOT be synchronizing
two lights together, cut the white
wire short and tape it off so that it
does not come into contact with
anything.
BLACK
3. After the black and red wires are
connected you may set the flash
pattern using the green wire.
4. You can program your light for
any of the 12 different patterns in
either of two “phases” (Refer to
pattern list).
GOOD
CHASSIS
GROUND
5. The lights are preset at the factory for Pattern #6 (non-rotating versions) or Pattern #4 (rotating
versions). You can cycle through the other patterns by briefly touching the green wire to
ground for approximately 1 second and releasing it.
6. After the pattern has been set, tape or place a wirenut over the end of the green wire to
prevent it from coming into contact with ground again (permanent mount). The light
will “remember” the pattern when switched off and that pattern will be displayed the
next time the light is switched on.
7. SHORTCUTS: There are a number of “shortcuts” available to make the programming
of your light easier:
Review the chart below for a list of how long you need to touch the
green wire to ground to go to the desired pattern.
SWITCH
RED
PURPLE
High/Low Power Select (Ground for Low/Open for High)
WHITE
GREEN
Pattern Select - Touch and release to Ground
Synchronization Wire
5 AMP
FUSE
CONNECT
TO +12 VDC
Length of Hold
Unit Blinks Non-Rotating Models Jump To Rotating Models Jump To
1 second Does Not
3 seconds
6 seconds
9 seconds
1 time
2 times
3 times
12 seconds 4 times
18 seconds 5 times
Next Pattern
Pattern 1
Pattern 6
Pattern 13
Pattern 18
Steady Burn
Next Pattern
Pattern 4
Pattern 6
Pattern 16
Pattern 18
Steady Burn
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Pattern List
Flash
Pattern
To set the light to one of the Pattern Defaults, hold green wire to GROUND for the
appropriate time as stated in pattern list.
Pattern
Type
#
1 K
2 L Fast Doubleflash 3.3
3 M Tripleflash † 2.5
4
5
6 F
7 G
8 H
9 I
10 J Variable AKA Delta-Omega 0.3
11 C Post pop 1.4CPS † 1.4
12 E Random 0.4CPS 0.4
13 K
14 L Fast Doubleflash 3.3
15 M Tripleflash † 2.5
16
17
18 F
19 G
20 H Singleflash †‡ 1
21 I
22 J Variable AKA Delta-Omega 0.3
23 C Post pop 1.4CPS † 1.4
24 E Random 0.4CPS 0.4
NA N/A Steady NA 18Sec
† - Approved patterns for SAE J845
‡ - California Title 13
Phase Pattern Description CPS
Flicker † 1
N
A5
O
A6
N
A5
O
A6
PSU Flicker (Non-Rotating Models)
CCW Rotation 1 (Rotating Models) †
PSU Random (Non-Rotating Models)
CCW Rotation 2 (Rotating Models)
1
Quadflash †‡
Quadflash w/Post-Pop †‡
Singleflash †‡
Doubleflash †‡
Flicker † 1
PSU Flicker (Non-Rotating Models)
CW Rotation 1 (Rotating Models) †
PSU Random (Non-Rotating Models)
CW Rotation 2 (Rotating Models)
Quadflash †‡
2
Quadflash w/Post-Pop †‡
Double flash †‡
Pattern
Defaults
(Non-R otating Only )
0.7
(Rotating Only)
1.3
0.6
2.7
1
1
1
1
(Non-R otating Only )
0.7
(Rotating Only)
1.3
0.6
2.7
1
1
1
3Sec
3Sec
6Sec
9Sec
9Sec
12Sec
To increment through pattern list, momentarily connect Green wire to GROUND and release.
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Synchronization of Multiple Lights
(Permanent Mount Versions Only)
You can synchronize up to six total approved lights.
If you will be synchronizing two or more units together, leave the white wires
disconnected until programming for each has been completed. Connect the
white wires from the units together ONLY AFTER PROGRAMMING them
all for the same Pattern Type (Phase MAY differ).
If you will be synchronizing your light with any of our products, please note the
following:
• All units that are to be synchronized MUST have the same Pattern Type.
• To check pattern compatibility with other “S-Link” products, review the Pattern List for each
product, noting the Pattern Type. Certain patterns are compatible with some lights, but not
compatible with others.
• Although the programmable Flash Patterns can vary between our different lights, Pattern
Types F, G, H, I, & J are fully compatible patterns with ALL of our other “S-Link” products.
1. Determine whether you want the two lights to flash alternately or simultaneously (Review the
diagram below for examples of Alternating and Simultaneous flashing).
2. Review the Pattern List for each synchronized product, noting the Pattern Type for each
product.
3. Select a Pattern Type that is compatible with all of the lights/flashers you will be synchronizing.
4. Program each light according to the instructions enclosed with each. For lights that have
patterns with a Phase: All lights programmed for the same Phase will flash ON and OFF at
the same time (flash simultaneously). Lights that are programmed for different phases will flash
opposite one another (alternate).
5. After you have the correct patterns programmed for ALL of the lights you wish to
synchronize, turn all of the lights off and connect the white wires from all units together.
6. Power all of the lights
up at the exact same
time to verify they are
flashing in the desired
pattern. Power MUST
be applied to all
synchronized lights
simultaneously.
Excessive switch
bounce or
attempting to power
the units up
independently will
result in erratic
operation.
2 Complete flash cycles shown
Phase 1
Cycle 1
Phase 2
TIME
Cycle 2
Alternating Mode
Head 1 Head 2
(ON)
Head 2
(OFF)
Simultaneous Mode
2 Complete flash cycles shown
Head 1
Phase 2 Phase 1
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Mounting
Dish Mounting
These lights have been designed as a direct
replacement similar type lights that install on a 6½inch “dish” style base that is already mounted on the
vehicle. If you are NOT mounting this light on an
existing “dish” style base, please skip to the next
section.
1. After making your electrical connections, simply
slide the light over the top of the “dish” that is
installed on the vehicle.
2. Align the holes in the base of the light with the
holes in the “dish” and install the screws,
securing the light to the “dish”.
Hook Mounting
If this is a new install, mount the light using the hook
bolts as describe below.
1. Drill two 9/32” holes on 6-3/4” centers.
CAUTION: Check your location PRIOR to
drilling to ensure you do not damage anything on
either side of the hole.
2. Install the gasket around the base of the light
and place the hook bolts into the base of the
light. The hook bolts will hang loose until the
light is installed.
3. Push the hook bolts through the two holes you
drilled in the mounting surface
4. Install a flat washer, split washer, and nut on
each hook bolt. Carefully tighten each nut until
the light is secure.
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Service
These lights use state-of-the-art Light Emitting Diode (LED) technology. These warning lights are
comprised of ultra-high intensity LEDs that are controlled by a solid state flasher unit to efficiently
produce light output with lifetimes up to 100,000 hours. Under normal circumstances, you will not
need to replace any LEDs in this light. If any of the LED's in your light do fail, please contact your
distributor for arrangements to have them repaired. The flasher unit and heads CANNOT be
serviced in the field and any attempt to do so will void the warranty.
The manufacturer warrants this LED light against factory defects in material and workmanship for five years
LED FIVE YEAR LIMITED WARRANTY
after the date of purchase. The owner will be responsible for returning to the Service Center any defective
item(s) with the transportation costs prepaid. The manufacturer will , without charge, repair or replace at its
option, products, or part(s), which its inspection determines to be defective. Repaired or replacement
item(s) will be returned to the purchaser with transportation costs prepaid from the service point. A copy of
the purchaser's receipt must be returned with the defective item(s) in order to qualify for the warranty
coverage. Exclusions from this warranty include, but are not limited to, domes, and/or the finish. This
warranty shall not apply to any light, which has been altered, such that in the manufacturer's judgment, the
performance or reliability has been affected, or if any damage has resulted from abnormal use or service.
There are no warranties expressed or implied (including any warranty of merchantability or fitness), which
extend this warranty period. The loss of use of the product, loss of time, inconvenience, commercial loss or
consequential damages, including costs of any labor, are not covered. The manufacturer reserves the right
to change the design of the product without assuming any obligation to modify any product previously
manufactured.
This warranty gives you specific l egal rights. You might also have additional rights that may vary from state to
state. Some states do not all ow limitations on how long an implied warranty l asts. Some states do not allow
the exclusion or l imitation of incidental or consequential damages. Therefore, the above limitation(s) or
exclusion(s) may not apply to you.
If you have any questions concerning this or any other product, please contact our
Customer Service Department to obtain a Returned Materials Authorization
Please write the RMA # clearly on the package near the mailing label.
Customer Service Department at (585) 226-9787.
If a product must be returned for any reason, please contact our
number (RMA #) before you ship the product back.
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