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NIGHT SCAN VERTICAL, VERTICAL COMPLETE, AND VERTICAL HDT
OPERATING INSTRUCTIONS
TP-4836201-H
MAY 2021
11 Appendix
This section contains the appendixes for your system.
11.1 Automated Hatch Cover
Some integrators may want to put the vertical mast in a well and include a hatch cover that is
automatically opened by the system. Figure 11-1 shows one example of how this may be
implemented. The relay K1, both limit switches, and hatch solenoid valves are all supplied by the
integrator. The theory of operation is as follows:
When the system is initiated and the up button is pressed, the system opens its “mast inactive”
contact between pins J and K of the DC/Control Cable, which de-energizes K1. This applies
pressure to the air valve to open the hatch. As soon as the hatch cover moves off the “Hatch
Closed” limit, the switch opens and the warning light comes on. (The “Hatch Closed” limit switch
is wired to take the place of the system “mast inactive” contacts.) Once the hatch is fully opened,
the “Hatch Open” limit switch closes, which allows the up valve of the mast (part of the system
supplied by The Will-Burt Company) to be energized and the mast extends.
Stowing the mast reverses this process. When the mast is completely lowered, the system de-
energizes itself and closes the “mast inactive” contact between pins J and K of the DC/Control.
This energizes relay K1, which removes power to the hatch open valve and energizes the hatch
close valve. Once the hatch is completely closed, the “Hatch Closed” limit switch closes and
turns off the warning light. See the system wiring diagram in Section 11.2 for information on how
to wire an automated hatch cover.
Figure 11-1 Automatic Hatch Cover Control Schematic
11.2 System Wiring Diagram
The system wiring diagrams are as follows:
Summary of Contents for Night Scan Vertical 4.3-15
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