{"product_id":"rdl-st-acr1","title":"RDL ST-ACR1 – Line-Level Audio-Controlled Relay, 0.5 to 5 s Delay","description":"\u003ch2\u003eWhat is the RDL ST-ACR1?\u003c\/h2\u003e\u003cp\u003eThe RDL ST-ACR1 is a STICK-ON audio controlled relay that switches equipment when line-level audio is present. It lets program audio trigger relay contacts, video switching or other control functions automatically.\u003c\/p\u003e\u003ch2\u003eHow does it work?\u003c\/h2\u003e\u003cp\u003e\u003cimg src=\"https:\/\/rdlnet.com\/wp-content\/uploads\/2024\/01\/st-acr1.jpg\" alt=\"RDL ST-ACR1 Line-Level Audio Controlled Relay\" style=\"max-width:100%;height:auto\" loading=\"lazy\"\u003e\u003c\/p\u003e\u003cp\u003eA multi-turn SENS trimmer sets the trigger threshold from -30 dBu to 0 dBu, assisted by a threshold LED. A multi-turn DELAY trimmer sets how long the relay holds after audio drops below the threshold, adjustable from 0.5 to 5 s. The double-pole double-throw relay contacts switch up to 2 A, and an open-collector SLAVE output (25 mA) can drive indicators or slave relay modules, or a \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-tx-mvx\"\u003eTX-MVX video switch\u003c\/a\u003e. The balanced bridging input connects across balanced or unbalanced lines, and RDL recommends the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ps-24ax\"\u003ePS-24AX power supply\u003c\/a\u003e (international) or PS-24AS (USA).\u003c\/p\u003e\u003ch2\u003eWhat are the key features?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudio-triggered switching\u003c\/strong\u003e — The relay closes automatically when program audio exceeds the set threshold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable sensitivity\u003c\/strong\u003e — A multi-turn trimmer sets the threshold from -30 dBu to 0 dBu.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable release delay\u003c\/strong\u003e — Hold time after silence is adjustable from 0.5 to 5 s.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDPDT contacts\u003c\/strong\u003e — Double-pole double-throw contacts switch up to 2 A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen-collector SLAVE output\u003c\/strong\u003e — A 25 mA output drives indicators or other RDL modules.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RDL","offers":[{"title":"Default Title","offer_id":68025795707116,"sku":"ST-ACR1","price":146.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/st-acr1.jpg?v=1793583900","url":"https:\/\/creationnetworks.net\/products\/rdl-st-acr1","provider":"Creation Networks","version":"1.0","type":"link"}