Industrial 05704-A-A0122 Relay Card Module Assembly

Industrial 05704-A-A0122 Relay Card Module Assembly from SIEGER is a four-relay expansion PCB designed for Honeywell System 57 and Sieger System 57 control architectures; the device is commonly referenced as 05704-A-0122 in official manuals and product listings. As an Expansion Relay Card, it provides four voltage-free relay outputs that can be configured for alarm, fault, and inhibit conditions and is designed to pair with the Quad Relay Interface Card (05704-A-0121) to extend the system’s relay count to 16 outputs. The module uses front and rear access connections and a 26‑way D-type connector (SK1) to interface with four-channel control cards, with provisions for power, remote inputs, and analogue outputs. In System 57 deployments, this Sieger 05704 family card supports reliable discrete signaling across multiple detector loops, making it suitable for marine and industrial environments where expanded alarm interfacing is required. Typical field applications include alarm panels, remote annunciation, and fault isolation in process control and marine systems, where a reliable, discrete relay interface is required to manage multiple detector loops and signaling devices without loading the primary control channels.