RDL TX-PSD1 Paging Sound Detector, Switch-Selectable Input 25V, 70V, 100V

Bring paging into your mass notification and security infrastructure with the Radio Design Labs TX-PSD1 paging sound detector. Designed for B2B installations, the TX-PSD1 senses speaker-level paging and program audio on constant-voltage lines and automatically generates a control signal to trigger relays, input panels or other security and surveillance equipment. With switch-selectable inputs (25 V, 70 V, 100 V) — and 25 V support for 8 Ω, 75 W sources — it adapts to most PA systems. Field setup is fast: a front-panel sensitivity trimmer and signal LED let you set the trigger threshold, while an adjustable 3–25 second release delay and a status LED confirm operation. The transformer-isolated input protects audio circuits, and the open-collector SLAVE output provides reliable control for monitoring, access control, and emergency paging workflows. Compact, mountable on DIN rail, rack or pole and powered by 24 V DC, the TX-PSD1 is ideal for integrating paging into distributed monitoring and mass notification systems. Add the TX-PSD1 to your next security or AV deployment to automate paging-triggered actions and improve response times.

• Automates paging integration so amplified speaker pages trigger equipment and workflows for faster mass notification and security responses
• Switch-selectable 25V / 70V / 100V input (25V also supports 8 Ω up to 75W) to work with a wide range of PA and paging systems
• Front-panel sensitivity and 3–25 second release delay with LED indicators for quick, reliable field tuning and monitoring
• Open-collector SLAVE output enables direct control of relays, RDL modules or other ground-activated security/surveillance devices
• Compact DIN-rail, rack or pole mount design and 24 V DC power simplify installation in control rooms, comms racks and distributed monitoring points