TECHNICAL SPECIFICATIONS
INSTALLING THE 21.7490
CONNECTION DIAGRAMS
INPUT VOLTAGE .................... 10 to 30 Vdc
INPUT CURRENT ................... 8.5A at 12.8V, 4.2A at 25.6V
INPUT POWER ........................ 110 Watts
OUTPUT POWER .................... 90 Watts
OUTPUT ENERGY................... 74.4 Joules
FLASH RATES
Double Flash: ................ 170 flashes per minute.
Quad Flash: ................... 140 flashes per minute.
Quintuple Flash: ............ 140 flashes per minute.
Mega Flash:................... 140 flashes per minute.
IMPORTANT!
NOT
This product is
waterproof. It must be mounted to a metal surface in a clean dry area.
1. Physical Mounting
2. Strobe Head installation
Mount the power supply in a clean, dry location. Mounting the
unit to a flat metal surface will aid in heat dissipation. Use the
power supply as a template to mark the hole locations. The
mounting holes will accept up to a 1/4" bolt.
Plug the strobe light heads into the outlets. Keep the following in
mind:
• Heads connected to outlets 1 and 3 flash at the same time.
Note: The power
supply baseplate must be connected to chassis ground (GND) to
reduce radio interference.
• Heads connected to outlets 2 and 4 flash at the same time.
• Heads connected to 1 and 3 alternate with heads 2 and 4.
The
divides equally between all strobe heads
installed. Example: 90 Watts into 2 heads = 45 Watts per head.
Consider this before selecting the number and type of strobe
heads to install. Do not exceed the wattage rating of the head.
If you have purchased a pre wired switch harness, follow the
included instructions. If you are wiring the system yourself
follow the instructions below and the diagrams on the next page.
• Connect the RED wire to battery positive (+) or a fuse panel
circuit rated for at least 15 AMPS.
• Connect the BLACK wire to battery negative (-) or directly to
vehicle chassis.
• The VIOLET wire controls HIGH / LOW power. Low power
limits the flash intensity for nighttime use. Connect VIOLET to
+12/24V for LOW power, leave VIOLET disconnected for HIGH
power.
• YELLOW, GREEN, BLUE wires select the flash pattern and
also control which strobe head outlets are activated. A wire is
'selected' when connected to +12/24V. When all control wires are
unconnected the power supply is in a low current SHUTDOWN
MODE (Current is typically 25ma). See the PATTERN TABLE on
the next page for a complete list of functions.
output power
Note: This supply reduces output power when only 2 outlets are activated.
3. Electrical Hookup
:
:
POWER HARNESS
CONTROL HARNESS
Note: Use the correct size wire for power connections.
The length of the wires determines the size needed.
1 to 10 ft. use 18AWG wire.
10 to 20 ft. use 16AWG wire.
20 to 35 ft. use 14AWG wire.
35 to 50 ft. use 12AWG wire.
Note: VIOLET, YELLOW, GREEN and BLUE are all
circuits and can be wired with a minimum of 22AWG wire.
Low Current
MODEL NO. 21.7490
WIRING INSTRUCTIONS
SHO-ME
®
YELLOW
RED or GREEN
BLACK
WHITE
GREEN
BLUE
Power Connector
Control Connector
1
2
3
4
RED
10 to 30 Volts
+
FUSE 15 AMP
BASEPLATE
BLACK
GROUND
-
VIOLET HIGH/LOW power
Connect to
10 to 30V for LOW power,
leave unconnected for HIGH power.
+
Strobe Head Outlets
1
2
3
RED
BLACK
VIOLET
POWER HARNESS
1
2
3
YELLOW
GREEN
BLUE
CONTROL HARNESS
STROBE HEAD
EXTENSION CABLE
1
2
3
RED or GREEN
Ridge indicates pin 1
BLACK
WHITE
Heavy duty extension cables have a GREEN wire,
Light duty extension cables have a RED wire.
SHO-ME
STROBE OUTLETS
CONTROL
LOW
POWER
POWER
FUS
E
15A
RED
RED
BLACK
BLACK
VIOLET
WHITE
YELLOW
GREEN
BLUE
WARNING:
High Voltage. Please wait 5 minutes after shutting this
unit off before attempting service.
Warranty void if seal is broken.
INPUT VOLTAGE:
INPUT:
OUTPUT POWER:
10 to 30 Vdc
110 WATTS(8.5A)
90 WATTS
MODEL NO. 21.7490
4 OUTLET POWER SUPPLY
MANUFACTURED IN U.S.A.
