Double-pole double-throw contacts rated at 1 ampere. Contact sets can be wired in
parallel for redundancy or can switch two independent circuits (e.g. arming switch
for drogue and main). Can be wired to provide "ON" function when pushed in or when
released. See miniAlt/WD manual for picture.
Trimmed POPO switch
Push On / Push Off Power/Arming Switch Installation Suggestions
Installation of POPO push on/push off switches in 5.5" altimeter bay Two POPO switches
are used in this installation to control dual altimeters (the altimeters ride on
a plywood plate to be mounted on top of the two batteries). The switches are mounted
with their centers in line with the plane created by the threaded rods so the activation
holes can be drilled in the airframe exactly 180 degrees apart. The activation holes
also serve as pressure sampling holes for the altimeters. Note connections in detail
diagram â both sets of contacts are wired in parallel for redundancy. The lower switch
(detailed) is wired to turn ON when the switch plunger is OUT, the upper switch is
wired to turn ON when the switch plunger is IN. The altimeter's power-up beep sequence
provides audible confirmation of switch activation.
Installation of POPO push on/push off switches in 4" altimeter bay
Two POPO switches
are also used in this installation to control dual altimeters (one complete set is
visible, an identical set is mounted on the opposite side of the plate). Switches
should be mounted as close to centerline of plate as possible so they can be activated
by "straight in" insertion of screwdriver or other tool. As in the previous example,
contacts are in parallel wired for maximum redundancy. Brass bolts through end plates
allow easy attachment of ematch wires with gas-tight seal.