AH504 Warning Panel Io Expansion

The Aero Safety Systems AH504 is a central warning I/O expansion unit designed to add input capacity to compatible AH500 and AH502SD programmable annunciators. It connects through an RS232 interface, enabling additional switched and analogue signals to be brought into the annunciator system.

Manufacturer part number: AH504

• 13 protected, filtered and buffered volt-free switched inputs
• 4 analogue inputs, 0–32 V DC, with 0.01 V resolution
• RS232 RX/TX interface for connection to AH500 or AH502SD annunciators
• 10–32 V DC power supply
• Bulkhead-mount enclosure; approximate dimensions 151 × 32 × 23 mm

The additional inputs can support monitoring of aircraft configuration and system signals, such as limit switches, controls, temperatures, voltages and current shunts, when incorporated into the applicable annunciator configuration.

Documentation

• Manufacturer AH504 specification sheet (PDF)
• Manufacturer AH504 installation drawing (PDF)

Installation and configuration should be performed in accordance with the manufacturer documentation and the requirements of the aircraft installation.