Will Burt NIGHT SCAN VERTICAL, Operating Instructions Manual

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PAGE 46 OF 98
NIGHT SCAN VERTICAL
OPERATING INSTRUCTIONS
TP-4836201-G
MARCH 2021
Connect the DC battery power to the +VIN (red or white) and COM (black) connections on
terminal block TB4 on the lower left side of the base board. The source must be capable of
delivering the maximum current as defined in the Technical Data table.
Note: The mast, RCP, and control box assemblies must be installed and wired prior to power-up.
Failure to do so will result in errors and could damage the unit.
5.10.4 Wiring Source Power to the Lighting Circuits
The lighting circuits consist of two (2) independently powered circuits: left and right. Depending
on the light package installed on the unit, the source power for the left and right light circuits will
change to match the light fixtures. Be sure to confirm the installed light fixture voltage
requirements before applying light power to avoid damaging equipment.
It is important to calculate the current draw for the wires in each lighting circuit. To calculate the
current draw for the wires:
• Divide the total watts of the entire mast unit by two (since there are two circuits).
• Divide the result by the voltage.
• This final result is the amperage required for each side light circuit.
Table 5-4 shows some example current calculations. Your mast may have different results based
on the installed light type and number of lights. In Example 1 (Table 5-4), the lights in the system
are a total of 500 watts. This is divided by two to get the watts per side. The result is then divided
by the voltage (12) to get the amps (21 rounded). The wires in this example should be able to
carry at least 21 amps with minimal voltage drop.
It is the responsibility of the installer to provide over-current protection for both lighting circuits.
The over-current protection on each circuit should be sized for the calculated current draw for the
installed lights (and not based on wire size current capacity). It is also the responsibility of the
installer to provide a means to remove/isolate power from the mast light circuits and permit the
operator to follow proper lock-out tag-out procedures for maintenance or troubleshooting.
Light power cables can be purchased from The Will-Burt Company or provided by the installer.
For CE conformity, the installer must provide the light power cables in conformance with
applicable Directives. Cables supplied by The Will-Burt Company do not have blue color for
conductor identification.
If the cables are supplied by the installer, the cables must:
• Be type SOOW or equivalent.
Table 5-4 Sample Light Circuit Current Draw Calculation
Total Watts Voltage Current Draw Per Side (Amps)
Example 1 500 W 12 VDC 21 Amps per side
Example 2 1500 W 120 VAC 6.25 Amps per side