ACR&Artex ThunderBird SSAS User Manual
Page 8
Y1-03-0180 Rev. D
5
3.3.1
General information
SSAS beacons are required to have at least two remote activation points, one of which is on the navigation
bridge. Two switches are supplied with the ThunderBird SSAS. Contact the factory if additional switches
are required.
The switches are required to be protected from inadvertent activation and activate only with two
independent mechanical actions. These requirements are satisfied by the spring-loaded switch guard
attached to the switch when shipped. The switches must be installed with the guard in place.
3.3.2
Switch location
The switches are designed to be installed through a hole in a panel and requir
e approximately 1” (25.4
mm)
by 1” (25.4 mm) clearance on both the front and the back. The recommended panel thickness is
0.039” (1mm) to 0.106” (3.2mm).
There are some additional factors that should be considered when selecting the switch locations. A
primary consideration is installing the switches per IMO requirements: one on the navigation bridge and the
other in a secondary covert location. Each switch should also be installed in a location that will not draw
unnecessary attention, yet be easy to access. The switches should not be installed in a location where
they might be confused with other switches. Lastly, the wiring routing may also be considered.
3.3.3
Recommended wire
ACR recommends using stranded, tinned wire between 16 to 22 AWG to connect between the remote
activation switches and the beacon mounting bracket. Stranded wire is recommended to better withstand
the effects of vibration. Tinned wire is resistant to corrosion. The recommended wire gauge is a
compromise between weight and strength. ACR provides crimp-on terminal lugs for 16 to 22 AWG wire for
the connection to the mounting bracket. Other marine grade lugs (Not Supplied) can be used for different
gauge wire.
Because two wires are required to connect the switch to the mounting bracket, a two conductor cable is
ideal. This makes routing the wire easier and provides additional strength.
ACTIVATION BUTTON WITH
RECOMMENDED WIRE SOLDERED
TO THE SWITCH
FIGURE 1
WIRING CONNECTION ON THE
MOUNTING BRACKET COMING FROM
ACTIVATION SWITCH
FIGURE 2