The PM429-1 is a low-cost ARINC 429 interface for PC/104 embedded computers. In addition to the four receive and two transmit ARINC 429 channels, the PM429-1 has configurable input (8) and output (4) discretes and a programmable timer. The PM429-1 has many features that are not available on simpler ARINC 429 interfaces. These features minimize the load on the host processor and can even eliminate the need for additional cards. The straightforward architecture and I/O-mapped registers make integration and application programming a simple task in any operating system.
Designed for flexibility, the PM429-1 can be ordered in various configurations to provide the most cost-effective solution for a given application. Industrial temperature range is standard; commercial and military temperature ranges are available. For rugged applications, the standard switches and moveable jumpers can be replaced with fixed settings, and conformal coating is available. Input discretes may be configured for different voltages in a variety of series and shunt circuits. Output discretes are open-collector with an optional internal pull-up resistor. The number of discretes and the ARINC 429 channel count can be reduced for cost savings and a second clock can be added for non-standard ARINC 429 frequencies (such as ARINC 575). For critical applications, the PM429-1 can be ordered with the transmitters permanently disabled.