The SR429/1M is a single bit ARINC converter, with additional inputs for up to two independent discrete analog signals. The typical application for the SR429/1M is for failure indications, although the device can be used for a wide range of ARINC digital to analog conversion situations. What makes the SR429/1M device unique is its ability to be packaged inside a traditional switch, indicator or NEXSYS Module.
Transponder supplies the ARINC decoder circuitry with the two wire ARINC signal input and can be configured with the following options:
The internal fail sense circuitry simultaneously monitors the operation of the internal ARINC decoder and 2 optional external inputs and drives a single discrete output. Output will be normally Ground and become Open (high impedance) upon 1) a “fail” signal from the internal health monitor or 2) an indication from either of the optional external inputs.