2
3
Figure 1 Wiring Diagram - Eight Lamp Sequential Operation
Right Amber
Right Red
Left Red
Left Amber
Master Switch
Start Switch
Door Switch
+12V
Fuse
Override Switch
+12 V
Note - If Stop Arm
exceeds 3 amps
use relay circuit.
Coil
+12V
Relay Circuit
Pin 5
+12 V
Sequence Of Operation
1. Start Switch is activated (momentary contact).
2. Amber lights start flashing (alternately).
3. Door Switch closes. Amber lights stop.
4. Red lights start flashing and stop arm is actuated.
5. Door Switch opens, red lights stop flashing and stop arm is retracted.
Note - Anytime Override Switch is closed red lights
start flashing immediately.
Figure 2 Wiring Diagram - Eight Lamp Non-Sequential Operation
Right Amber
Right Red
Left Red
Left Amber
Master Switch
Start Switch
Door Switch
+12V
Fuse
Override Switch
+12 V
Note - If Stop Arm exceeds
3 amps use relay circuit.
Relay Circuit
+12V
Coil
Pin 5
+12 V
Sequence Of Operation
1. Start Switch is activated (momentary contact).
2. Amber lights start flashing (alternately).
3. Door Switch closes.
4. Amber lights stop and red lights start flashing.
5. Door Switch opens, red lights stop flashing.
Note - Anytime the Door Switch or Override Switch
is closed red lights start flashing immediately.
Figure 3 Wiring Diagram - Four Lamp Sequential Operation
Right Front
Right Rear
Left Front
Left Rear
Master Switch
Start Switch
Door Switch
+12V
Fuse
Override Switch
+12 V
+12V
Coil
+12 V
Sequence Of Operation
1. Start Switch is activated (momentary contact).
2. Red lights start flashing (alternately).
3. Door Switch closes.
4. Stop Arm is actuated and red lights continue to flash.
5. Door Switch opens, red lights stop flashing and
Stop Arm is retracted.
Note - Anytime Override Switch is closed red lights
start flashing immediately but Stop Arm only actuates
when Door Switch is actuated.
Specifications
Operating Voltage:
8 to 16 Volts DC
Output Current Rating
Lamps (Pins 3, 4, 6, & 7):
16 amps
Stop Arm (Pin 5):
3 amps
Operating Temperature:
-40
°
C to +85
°
C
Storage Temperature:
-50
°
C to +85
°
C
Terminals:
0.250 Inch Faston (11 total)
Mechanical Drawing
All dimensions in inches.
Fuse
Fuse
Fuse
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0.250
6.00
6.50
0.256
0.875
1.00
0.175 x 0.250
Stop
Arm
Stop
Arm
Stop
Arm
Stop
Arm
Stop
Arm
0.250 Inch
Faston Terminals
1
2
3
4
5
6
7
8
9
10
11
1- Override
2 - Master
3 - Right Amber
4 - Right Red
5 - Stop Arm
6 - Left Red
7 - Left Amber
9 - FRAA
10 - FR
11 - Ground
8 - Start
1 - Override
2 - Master
3 - Right Amber
4 - Right Red
5 - Stop Arm
6 - Left Red
7 - Left Amber
9 - FRAA
10 - FR
11 - Ground
8 - Start
1- Override
2 - Master
3 - Right Amber
4 - Right Red
5 - Stop Arm
6 - Left Red
7 - Left Amber
9 - FRAA
10 - FR
11 - Ground
8 - Start
Model SBF90
Eight Lamp School Bus
Electronic Flasher/Controller
I
n
P
O WER
the systems people
InPOWER LLC
Galena, Ohio
(866)548-0965
www.InPowerDirect.com
Ground
FR FRAA Start
Amber Red
Left
Stop Arm
Red
Amber
Right
Master Override