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RDL, Radio Design Labs - TX-PCR1
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Paging Controlled Relay

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Model: TX-PCR1
  • Switching Functions Controlled by Speaker-Level Source
  • Input Accepts Amplified Constant Voltage Signals
  • Switch-Selectable Input: 25 V, 70 V, 100 V
  • 25 Volt Input Also Accepts 8 Ω Inputs up to 75 Watts
  • Transformer-Isolated Input
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he TX-PCR1 is the ideal choice in many applications where switching needs to be controlled from a constant-voltage amplified audio source. The module will trigger on any program material, with paging sources being the most common. The TX-PCR1 includes both an open-collector SLAVE output to control other modules or equipment and a DPDT high power switching relay suited to switching speaker loads. The amplified audio source is connected using a detachable terminal block. A front-panel switch is provided to select the source type: 25 V, 70 V or 100 V. The 25 V setting may be used for an 8 ohm, 75 Watt maximum, amplified source. Input sensitivity is adjusted on a single-turn trimmer. In the clockwise position, the SENSITIVITY trigger threshold is 30 dB below the switch-selected constant voltage. A red LED illuminates whenever the audio level exceeds the trigger threshold, facilitating the sensitivity adjustment.
  • Switching Functions Controlled by Speaker-Level Source
  • Input Accepts Amplified Constant Voltage Signals
  • Switch-Selectable Input: 25 V, 70 V, 100 V
  • 25 Volt Input Also Accepts 8 Ω Inputs up to 75 Watts
  • Transformer-Isolated Input
  • Front-Panel Trimmer Provides Sensitivity Adjustment
  • Signal Threshold LED Facilitates Sensitivity Adjustment
  • Front-Panel Trimmer Provides Release Delay Adjustment
  • LED Indicates when Module is Triggered
  • Release Delay Adjustable from 3 to 25 Seconds
  • Open-Collector Output Active when Module is Triggered
  • Switches on Paging or Any Other Amplified Audio Signal
  • 8 Amp DPDT Relay Contacts for Switching Speaker Loads
  • Ideal for Muting or Switching Primary Speakers During Paging