WIRING/CONNECTION DIAGRAMS
PATTERN TABLE
TROUBLESHOOTING
ACCESSORIES
DIAGRAM (1):
ON/OFF and Low Power using two toggle
switches. Flash pattern is: Quad Flash All Heads.
Selecting a flash pattern:
In the table below, find the desired
flash pattern. Connect the wires marked
to the
'load' side of the ON/OFF switch.
Example: Diagram 1 uses pattern #4 (Quad Flash, All Heads).
To change this to pattern #6 (Mega flash, All Heads)
connect the YELLOW and BLUE wires to the switch.
POWER
Remove the remaining
wires, or connect them to Ground.
Remove the remaining wires, or connect them to Ground.
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DIAGRAM (2):
ON/OFF and Low Power using one DPDT
rocker switch. Flash pattern is: Quad Flash All Heads.
DIAGRAM (3):
Selective switching of strobe head pairs. Low
Power selection. Flash pattern is: Quad Flash All Heads.
Blown Fuse
Erratic behavior (and/or) shutdown
: The 21.7490 will blow a fuse if the input
voltage is reversed. If this happens, first locate the wiring
fault, then replace the fuse with one of the same rating.
: The 21.7490 will
shut down if there is a short circuit condition on any one of
the strobe heads. If the electrical conductors connecting
the power supply to the strobe heads are exposed to water
a short circuit will result. The first sign is intermittent
operation, followed by complete shutdown of the strobe
system. To find the short circuit, unplug all strobe head
cables from the 21.7490. Test
cable/head at a time
until the problem is found.
one
PATTERN
YELLOW
GREEN
BLUE
FUNCTION
1
SHUTDOWN
2
POWER
Quad Flash, Head 2 ALT 3
3
POWER
Quad Flash, Head 1 ALT 4
4
POWER
POWER
Quad Flash, Head 1&3 ALT 2&4
5
POWER
Mega Flash, Head 2 ALT 3
6
POWER
POWER
Mega Flash, Head 1&3 ALT 2&4
7
POWER
POWER
Mega Flash, Head 1 ALT 4
When in High Power: Quintuple Flash, Head 1&3 ALT 2&4
When in Low Power: Double Flash, Head 1&3 ALT 2&4
ALT = "Alternates With"
POWER
POWER
POWER
8
The following accessories are available to make the
installation of the 21.7490 power supply even easier:
A Fully assembled switch panel which provides simple
On/Off and Low power control. Provides the same
functions as shown in Diagram (1)
A Fully assembled switch panel which allows selective
switching of strobe head pairs and also includes Low
power control.
A fully assembled switch panel which provides full
selection of all flash patterns as well as On/Off and Low
Power control.
21.7001
21.7002
21.7003
ON/OFF - LOW POWER SWITCH PANEL
SELECTIVE SWITCHING PANEL
ROTARY SWITCH PANEL
Provides the same functions as shown in
Diagram (3)
All panels are pre-wired with 15'(standard) of cabling.
INSTALL- PS 21.7490.CDR
Unused wires should either be removed, or connected to Ground.
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SPST
SPST
1
2
3
15
1
2
3
BATTERY -
GND, vehicle
chassis.
RED
YELLOW
GREEN
BLUE
BLACK
VIOLET
NO CONNECTION
NO CONNECTION
LOW POWER
SWITCH
ON / OFF
SWITCH
NO CONNECTION
POWER HARNESS
CONTROL HARNESS
Toggle switches:
General purpose Single
Pole Single Throw.
Current through switch is
less than 1 amp.
B
OR CONSTANT
POWER CIRCUIT
1
2
3
15
1
2
3
BATTERY -
GND, vehicle
chassis.
RED
YELLOW
GREEN
BLUE
BLACK
VIOLET
NO CONNECTION
NO CONNECTION
POWER HARNESS
CONTROL HARNESS
Rocker Switch:
General purpose Double
Pole Double Throw.
Current through switch is
less than 1 amp.
B
OR CONSTANT
POWER CIRCUIT
Unused wires should either be removed, or connected to Ground.
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15
SPST
SPST
SPST
1
2
3
1
2
3
B
Fuse panel, Ignition or
accessory circuit.
BATTERY -
GND, vehicle
chassis.
RED
YELLOW
GREEN
BLUE
BLACK
VIOLET
NO CONNECTION
NO CONNECTION
LOW POWER
SWITCH
HEADS 1+4
ON/OFF
HEADS 2+3
ON/OFF
NO CONNECTION
POWER HARNESS
CONTROL HARNESS
Toggle switches:
General purpose Single
Pole Single Throw.
Current through switch is
less than 1 amp.
Unused wires should either be removed, or connected to Ground.
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