Table 9 Control Wires From The Serial Interface Module - Federal Signal Corporation Legend LGD Installation, Operation And Service Manual

Preparing the Legend for Installation
4. Plug the 24-pin harness (2) into the Serial Interface Module.
5. Attach the light bar's black ground power line (3) to the negative battery (–GND)
lug.
6. Attach the light bar's red power line (4) through a 40 A MAXI
positive battery (+BAT) lug.
7. Attach the white wire (5) from the 24-pin harness through a 1 A fuse to the
positive battery (+BAT) lug.
8. Attach the black wire and the black/white wire (6) from the 24-pin harness to the
negative battery (–GND) lug.
Control Wires for Flash Patterns
This section describes how to program flash patterns during bench testing and
programming by applying 12 Vdc to the control wires in the Serial Interface
Module's 24-pin harness. Table 9 shows the control wires and their colors. The
wire's first color is the predominant color; additional colors are stripes.

Table 9 Control wires from the Serial Interface Module

Light Bar Controls
MODE 1
MODE 2
MODE 3
STEADY BURN
(Legend light bar
models only)
FRONT CUTOFF
FRONT ENABLE
REAR CUTOFF
REAR ENABLE
INTERSECTION
FLASH TAKEDOWN/
ALLEY
LEFT ALLEY
RIGHT ALLEY
TAKEDOWN
LOW POWER
LIGHT BAR TEST
PATTERN
20
Wire Color Description
Blue Lowest priority
Blue/White Overrides MODE 1
Black/Red Overrides MODES 1 and 2
Red/White One or more LEDs steadily burn when 12 Vdc is
applied to the control wire for a MODE and the
control wire for STEADY BURN
Turns OFF the FRONT of the light bar
Green/White
Turns ON the FRONT of the light bar
Turns OFF the REAR of the light bar
Orange/Black
Turns ON the REAR of the light bar
Blue/Black Typically a high activity pattern. Overrides all three
priority modes.
Red/Black Flashes the ALLEY and TAKEDOWN lights in
MODES 1, 2, or 3
Green/Black Turns on LEFT ALLEY lights. Overrides the FLASH
TAKEDOWN/ALLEY lights
Orange/Red Turns on RIGHT ALLEY lights. Overrides the FLASH
TAKEDOWN/ALLEY lights.
White/Black Provides white light to the front. Overrides FLASH
TAKEDOWN/ALLEY lights and FRONT CUTOFF.
White/Black/Red Dims the lights approximately 50 percent to prevent
blinding approaching drivers. LOW POWER is only
available in MODES 1 and 2 and is disabled when
switched to another flash pattern, including MODE 3
and INTERSECTION.
Black/White/Red Flashes the LEDs sequentially and then flashes the
TAKEDOWN and ALLEY lights. Does not test the
Steady Burn LEDs.
®
Legend LGD and Legend LPX Light Bars
Federal Signal www.fedsig.com
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