{"product_id":"rdl-tx-psd1","title":"RDL TX-PSD1 – Paging Sound Detector for 25\/70\/100 V Lines","description":"\u003ch2\u003eWhat is the RDL TX-PSD1?\u003c\/h2\u003e\n\u003cp\u003eThe RDL TX-PSD1 is a paging sound detector that triggers an open-collector output when audio appears on a constant-voltage speaker line. It controls RDL modules or other equipment during pages in commercial paging systems.\u003c\/p\u003e\n\u003ch2\u003eHow does it work?\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/rdlnet.com\/wp-content\/uploads\/2024\/01\/tx-psd1.jpg\" alt=\"RDL TX-PSD1 Paging Sound Detector for 25\/70\/100 V Lines\" style=\"max-width:100%;height:auto\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe amplified source connects through a transformer-isolated detachable terminal block, with a front-panel switch selecting 25 V, 70 V or 100 V; the 25 V setting also accepts 8 Ω sources up to 75 W. A sensitivity trimmer and red threshold LED set the trigger level, and a delay trimmer holds the module triggered for 3 to 25 seconds after audio falls below threshold, indicated by a green LED. When triggered, the SLAVE terminal is pulled to ground through an open collector to control equipment with ground-activated inputs that permit a 24 V pull-up. For switching speaker loads directly, RDL offers the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-tx-pcr1\"\u003eTX-PCR1\u003c\/a\u003e with DPDT relay contacts. RDL lists TX mounting accessories such as the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-tx-ra5\"\u003eTX-RA5\u003c\/a\u003e 19-inch racking system and \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-mb-1\"\u003eMB-1\u003c\/a\u003e mounting kit for this module.\u003c\/p\u003e\n\u003ch2\u003eWhat are the key features?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstant-voltage input\u003c\/strong\u003e — A switch selects 25 V, 70 V or 100 V speaker line inputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransformer-isolated input\u003c\/strong\u003e — The amplified audio input is isolated by a transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable sensitivity\u003c\/strong\u003e — A trimmer and threshold LED set the trigger level from -40 dB to -15 dB.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable release delay\u003c\/strong\u003e — The output stays active for 3 to 25 seconds after the audio stops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen-collector SLAVE output\u003c\/strong\u003e — The SLAVE terminal pulls to ground at 25 mA to control other modules or equipment.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RDL","offers":[{"title":"Default Title","offer_id":68025798164716,"sku":"TX-PSD1","price":135.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/tx-psd1.jpg?v=1793583963","url":"https:\/\/creationnetworks.net\/products\/rdl-tx-psd1","provider":"Creation Networks","version":"1.0","type":"link"}