TX-PCR1

Paging Controlled Relay The 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 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. The module is triggered when the audio exceeds the threshold and it remains triggered for a defined time duration after the audio falls below the threshold.

• Switching functions controlled by speaker-level source
• Input accepts amplified constant voltage signals
• Switch-Selectable Input: 25 V, 70 V, 100 V
• 25volt input also accepts 8ohm 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
• 8A DPDT relay contacts for switching speaker loads
• Ideal for muting or switching primary speakers during paging