Wiring Vehicle Safety Interconnect Circuit - Will Burt Night Scan Powerlite Operating Instructions Manual

NIGHT SCAN POWERLITE, POWERLITE XTREME, AND POWERLITE HDT
OPERATING INSTRUCTIONS
5.7.4

Wiring Vehicle Safety Interconnect Circuit

The mast provides an isolated relay contact output to enhance integration into vehicle safety
circuitry. This output indicates whether or not the mast is stowed to indicate it is safe to move the
vehicle. The use of this vehicle safety interconnect is required for vehicle NFPA (National Fire
Protection Association) regulation compliance. The Will-Burt Company does not recommend
installing the mast on a vehicle without connecting to the vehicle safety interconnect circuit to
warn the driver or prevent the driver from moving the vehicle with the mast extended.
This relay output is from a bi-stable (latching) relay whose contacts either open or close (switch
selectable) when the mast is active (not stowed). Its state is not affected by whether or not there
is power to the mast. This contact is capable of carrying up to two (2) amperes and is available
on pins J4-8 and 9 (data cable supplied by the installer). Figure 5-12 shows an example vehicle
safety interconnect circuit. It can be used in conjunction with a customer-supplied relay to drive a
flashing warning light. Other arrangements are possible.
Figure 5-12 Example Vehicle Safety Interconnect Circuit
The contact output is set at the factory to be OPEN when the mast is active (not stowed) by
setting the S2-1 dip switch to the OFF (OPEN) position. To change the contact output to be
CLOSED when the mast is active, set the S2-1 dip switch to the ON (CLOSED) position. Mast
power needs to be cycled for this change to take effect.
TP-4723701-U PAGE 43 OF 98
MAY 2021