TX-PSD1

RDL TX-PSD1 - Paging Sound Detector for Constant Voltage Audio Lines

The RDL TX-PSD1 is a professional audio signal detector designed to monitor amplified constant-voltage speaker lines and trigger control functions when audio is present, such as paging announcements.

It accepts 25V, 70V, or 100V signals, and the 25V setting also supports 8Ω sources up to 75 watts. The transformer-isolated input ensures safe and reliable operation. Sensitivity and release delay are adjustable via front-panel trimmers. A red LED indicates when the signal exceeds the threshold, and a green LED shows when the module is triggered.

The TX-PSD1 provides an open-collector output that can control other RDL modules or equipment with ground-activated inputs. It operates on 24V DC and includes a blue power LED for status indication.

Functionality

• Detects audio signals on constant-voltage speaker lines
• Automatically triggers control outputs when audio is present
• Adjustable sensitivity and release delay
• LED indicators for threshold and trigger status
• 24V DC powered

Features

• Device type: audio signal detector
• Inputs: 25V, 70V, 100V (switch-selectable)
• Also supports 8Ω sources up to 75W (in 25V mode)
• Transformer-isolated input
• Output: open collector (active when triggered)
• Adjustable delay: 3 to 25 seconds
• LED indicators: power, threshold, trigger
• Power supply: 24V DC

The RDL TX-PSD1 is a reliable and flexible solution for AV professionals needing automatic audio detection in paging, sound reinforcement, or control systems.