Mounting The Serial Interface Module - Federal Signal Corporation Legend LGD Installation, Operation And Service Manual

3. Route and connect the light bar's red lead through a 40 A MAXI
fuse holder (or equivalent) at the source, which is the positive battery terminal
(+BAT).

Mounting the Serial Interface Module

The Serial Interface Module communicates between a user-supplied light bar/siren
controller, a SignalMaster controller, or a switch box and the Legend. To minimize
the number of discrete wires to the light bar, control lead functions are wired to the
Interface Module through a 3-foot long, 24-conductor cable harness (Table 9 on
page 20). The information is converted to a digital format and communicated to
the light bar through the CAT5 serial communication cable. (The discrete-wired
24-inch Legend does not connect to the Serial Interface Module.)
LOCATION OF LIGHT SYSTEM CONTROLS: Locate light system controls
so that VEHICLE and CONTROLS can be operated safely under all driving
conditions.
NOTE: If you are using the External SignalMaster option, you must configure the
Serial Interface Module for External operation before installing it as described in
"Selecting External SignalMaster Control" on page 21.
UNIT REQUIRES SHELTER FROM WEATHER: The Serial Interface Module is
NOT waterproof. It must be mounted in a location that is sheltered from rain,
snow, standing water, etc.
UNIT REQUIRES VENTILATION: The Serial Interface Module needs to radiate
heat. Do not install it in an area where it cannot dissipate heat into the air.
Do not mount it near a heater duct.
IMPORTANT: The Serial Interface Module must be installed within 36 inches
(91 cm) of the light bar controller.
1. Use the Serial Interface Module as a template and scribe four drill position
marks at the selected mounting location. Mounting centers are 2 by
5.95 inches (5.08 cm x 15.11 cm)
DRILLING PRECAUTIONS: Before drilling holes, check the area into which
you plan to drill to ensure that you do not damage vehicle components. All
drilled holes should be deburred and all sharp edges should be smoothed.
Additionally, all exterior drilled holes must be sealed with Motorcraft seam
sealer T-A-2-B or equivalent to prevent the potential exposure to carbon
monoxide or other potentially harmful fumes. Failure to observe this
warning could cause serious injury or death.
Installation, Operation, and Service Manual
Federal Signal www.fedsig.com
Wiring the Legend in the Vehicle
fuse and
®
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