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Wiring the Legend in the Vehicle
28
Legend LGD and Legend LPX Light Bars
Federal Signal
www.fedsig.com
DRILLING PRECAUTIONS: DO NOT drill holes in ANY part of the Serial
Interface Module. Damage to the unit, serious injury, or death may result.
2.
Drill four mounting holes at the drill position marks, sized for the recommended
user-supplied #8 mounting hardware.
3.
Secure the Serial Interface Module to the mounting surface with user-supplied
#8 mounting hardware.
4.
Install the light bar’s CAT5 serial cable to the J3 output jack of the Serial
Interface Module.
5.
Install the three-foot-long, 24-conductor cable to the J1 input connector of the
Serial Interface Module.
SHOCK HAZARD: Strobe and HID light systems generate high voltages.
Disconnect power from the system and wait at least 5 minutes before
opening the unit. Do not apply power to the unit while the unit is open.
Failure to follow this warning could result in serious injury or death.
NOTE:
Powering multiple devices with a common control wire may cause one or
more devices to briefly remain functional after signal power is removed. For example,
due to the high input filter capacitance, a strobe supply can briefly supply the current
required to signal a light bar function to remain ON. If necessary, use a relay to
isolate devices with large filter capacitors. See Figure 4. All components/wires are
user-supplied.
Figure 4
Relay-isolating devices with large filter capacitors
290A5976
+12 Vdc
CONTROL LEAD
(12 Vdc SIGNAL ACTIVATED)
RELAY
FUSE*
STROBE SUPPLY
*FUSE AMPERAGE DEPENDS
ON AMPERAGE OF DEVICES
NOTE:
After installation, check the entire system to ensure that the lights are
flashing properly and that all light system functions are operating properly.