The RTS Systems PS-31 is a dedicated, linear power supply unit engineered to provide clean, stable, and reliable DC power for professional wired intercom systems, specifically those within the RTS product family. Its primary role is to convert standard AC mains voltage to the low-voltage DC required to operate multiple party-line intercom beltpacks, speaker stations, and interface panels. In critical communication environments like broadcast studios, live event production trucks, and theatrical installations, consistent power is essential to ensure clear, uninterrupted audio and full functionality of all connected intercom stations. The PS-31 is designed to meet this need with minimal electrical noise, preventing the introduction of hum or interference into the sensitive audio paths of the intercom network.

Housed in a standard 1U rack-mountable chassis, the unit is built for continuous operation and integrates protective features such as fuse protection and voltage regulation to safeguard connected equipment. It typically offers multiple output taps or a variable voltage control, allowing technicians to fine-tune the power level to match the specific requirements and cable length of their installed system. This adjustability ensures optimal performance across various system sizes and configurations. As a centralized and robust power source, the PS-31 eliminates the dependency on individual wall adapters for each beltpack, simplifying system wiring, improving reliability, and providing a single point of power management for the entire intercom loop.