{"product_id":"audac-adc-aru208-audac-touch-enabled-8-switching-relay-unit-with-rs485-tcp-ip-control-din-enclosure","title":"AUDAC ARU208 – 8-Relay Digital Relay Unit, DIN Rail, RS-485 \/ TCP\/IP","description":"\u003ch2\u003eWhat is the AUDAC ARU208 relay unit?\u003c\/h2\u003e\u003cp\u003eThe AUDAC ARU208 is a DIN-rail digital relay unit with 8 double-pole relays, controlled over TCP\/IP, RS-485, AUDAC Touch or dry-contact inputs. It switches audio sources, speaker lines and other circuits as part of an AUDAC or third-party control system. Typical uses are zone muting, source switching, paging overrides and simple building automation.\u003c\/p\u003e\u003ch2\u003eHow does the AUDAC ARU208 relay unit work?\u003c\/h2\u003e\u003cp\u003e\u003cimg src=\"https:\/\/images.pvs.global\/audac\/products\/ARU208.webp?width=1200\" alt=\"AUDAC ARU208 relay unit\" style=\"max-width:100%;height:auto\" loading=\"lazy\"\u003e\u003c\/p\u003e\u003cp\u003eEach of the ARU208's 8 relays is double-pole with normally open and normally closed contacts, so one relay switches a balanced mono or unbalanced stereo signal. AUDAC rates the relays for signals from line-level audio and amplified speaker lines (low impedance or 100V) up to low-voltage and 240 V AC mains distribution. Relays can be triggered from the built-in HTML5 web interface, AUDAC Touch, TCP\/IP commands from any control system, AUDAC paging consoles, or dry-contact inputs from buttons, switches and alarm contacts. Dry contacts take priority over digital triggers, and pre-programmed timers can fire relays on a schedule. Several units daisy-chain over RS-485, and the ARU208 has separate RS-485 in and out ports for easier wiring. The black ABS housing snaps onto a standard DIN rail and runs on 24 V DC from the optional PSD24x supply. It pairs with the AUDAC \u003ca href=\"\/products\/audac-adc-mtx88-8-zone-audio-matrix-system-processor-2-microphone-4-line-inputs-audac-touch-enabled\"\u003eMTX88\u003c\/a\u003e matrix and \u003ca href=\"\/products\/audac-adc-ncp105us-b-universal-wall-control-network-poe-us-single-gang-wallplate-black\"\u003eNCP105\u003c\/a\u003e wall controller. For a smaller system, see the \u003ca href=\"\/products\/audac-adc-aru204-audac-touch-enabled-4-switching-relay-unit-with-rs485-tcp-ip-control-din-enclosure\"\u003eARU204\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eARU204 vs ARU208:\u003c\/p\u003e\u003cdiv style=\"overflow-x:auto;-webkit-overflow-scrolling:touch\"\u003e\u003ctable style=\"border-collapse:collapse;min-width:560px;width:100%\"\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #ddd;padding:6px;text-align:left\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd;padding:6px;text-align:left\"\u003eRelays\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd;padding:6px;text-align:left\"\u003eRS-485 ports\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd;padding:6px;text-align:left\"\u003eMax power\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd;padding:6px;text-align:left\"\u003eDimensions\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd;padding:6px;text-align:left\"\u003eWeight\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u003ca href=\"\/products\/audac-adc-aru204-audac-touch-enabled-4-switching-relay-unit-with-rs485-tcp-ip-control-din-enclosure\"\u003eARU204\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e4\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e1 x RJ45\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e6 W\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e4.21 x 3.44 x 2.13 in\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e0.44 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u003ca href=\"\/products\/audac-adc-aru208-audac-touch-enabled-8-switching-relay-unit-with-rs485-tcp-ip-control-din-enclosure\"\u003eARU208\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e8\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e2 x RJ45 (in\/out)\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e12 W\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e159 x 87.5 x 54 mm\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e0.4 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eWhat are the key features of the AUDAC ARU208 relay unit?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e8 double-pole relays\u003c\/strong\u003e — NO and NC contacts on every relay.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide switching range\u003c\/strong\u003e — line audio, 100V speaker lines and up to 240 V AC per AUDAC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb interface\u003c\/strong\u003e — HTML5 control from any browser.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTCP\/IP and RS-485\u003c\/strong\u003e — open command set for third-party control systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDry-contact inputs\u003c\/strong\u003e — trigger from buttons, switches or alarms, with priority.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTimed triggers\u003c\/strong\u003e — pre-programmed relay schedules.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIN-rail mount\u003c\/strong\u003e — spring clip fits standard electrical cabinets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty\u003c\/strong\u003e — backed by a 5-year AUDAC manufacturer warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere is the AUDAC ARU208 relay unit typically used?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eConference room\u003c\/li\u003e\n\u003cli\u003eCommercial meeting space\u003c\/li\u003e\n\u003cli\u003eMulti-purpose room\u003c\/li\u003e\n\u003cli\u003eGovernment space\u003c\/li\u003e\n\u003cli\u003eAuditorium\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cdiv style=\"overflow-x:auto;-webkit-overflow-scrolling:touch\"\u003e\u003ctable style=\"border-collapse:collapse;width:100%;min-width:300px;table-layout:fixed\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"width:44%\"\u003e\n\u003ccol style=\"width:56%\"\u003e\n\u003c\/colgroup\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eARU208\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eRelays\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e8, two-pole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eContacts\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eNormally open and normally closed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eControl\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eRS-485 bus, dry-contact activation, TCP\/IP, AUDAC Touch, web interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eConnectors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eRJ45 (Ethernet); 2 x RJ45 (RS-485 + audio, in and out)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e8 x 3-pin screw terminal (A and B)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eOutputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e8 x 2-pin screw terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eMax. cable length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e300 m (RS-485, CAT5E, TIA\/EIA T568B)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e24 V DC; 12 W (max.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e159 x 87.5 x 54 mm (W x H x D)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e0.4 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eBlack ABS, DIN-rail mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eOptional\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003ePSD24x external power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat can the ARU208 switch?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003ePer AUDAC, line-level audio, amplified speaker lines (low impedance or 100V) and voltage distribution up to 240 V AC. Follow local electrical code for mains switching.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eHow is it controlled?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eFrom its web interface, AUDAC Touch, TCP\/IP commands, the RS-485 bus, AUDAC paging consoles, or dry-contact inputs.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan a fire alarm trigger it?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. Dry-contact inputs take priority over digital commands.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eDoes it come with a power supply?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eNo. It runs on 24 V DC; AUDAC offers the optional PSD24x supply.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan I connect several units?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes, by daisy-chaining over RS-485.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhere can I find compatible AUDAC gear?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eSee the \u003ca href=\"\/collections\/audac\"\u003eAUDAC collection\u003c\/a\u003e.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan Creation Networks program it?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. We design, install, program and support AUDAC systems nationwide. Call (888) 230-3661.\u003c\/p\u003e\u003c\/details\u003e","brand":"Audac","offers":[{"title":"Default Title","offer_id":68024322425068,"sku":"ADC-ARU208","price":654.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/ARU208.webp?v=1793553663","url":"https:\/\/creationnetworks.net\/products\/audac-adc-aru208-audac-touch-enabled-8-switching-relay-unit-with-rs485-tcp-ip-control-din-enclosure","provider":"Creation Networks","version":"1.0","type":"link"}