ACR&Artex 2-Wire ELT__RSWT Interface - Manual (Page 17)

ACR Electronics, Inc. 570-0049 Revision B
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Page 17 of 30
7. 453-0032 WIRING TO 140-3349 TOGGLE SWITCH
The interface has two connections available on the D-sub connector to connect either aircraft
power 14 VDC or 28 VDC. The connections have internal current limiting resistors to protect the
built-in LED on the toggle switch, so it is critical to establish the proper connection between the
interface, the toggle switch, and the aircraft power.
The power supply inside the interface is designed to operate on 6.5 to 30 V input. Due to this
wide input range, a switching power supply is used to create 5 V for power distribution throughout
the system. This switching supply allows the system to draw
on average approximately 125 μA
from a 14 V battery and 65 μA from a 28 V battery.
7.1 DIODES INSTALLATION
Ensure that the leads of the diodes do not touch the body of the toggle
switch, or any other contacts other than the ones mentioned below.
7.1.1 Solder the diodes 120-4007 to the toggle switch according to the following information:
Table 6: Diodes Location On The Toggle Switch