{"product_id":"idec-ru4s-d110-relay","title":"IDEC RU4S-D110 Relay","description":"\u003cp data-path-to-node=\"1\"\u003eThe \u003cb data-path-to-node=\"1\" data-index-in-node=\"4\"\u003eIDEC RU4S-D110\u003c\/b\u003e is a 4-pole, compact universal relay specifically designed for \u003cb data-path-to-node=\"1\" data-index-in-node=\"82\"\u003eDC control circuits\u003c\/b\u003e. While it looks identical to the AC version, it is engineered to handle 110V DC coil power, which is common in older high-voltage DC control logic or specific industrial power plants.\u003c\/p\u003e\n\u003cp data-path-to-node=\"2\"\u003e\u003cb data-path-to-node=\"2\" data-index-in-node=\"0\"\u003eCore Specifications\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"3\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,0,0\"\u003e\u003cb data-path-to-node=\"3,0,0\" data-index-in-node=\"0\"\u003eContact Form:\u003c\/b\u003e 4PDT (4 Form C).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,1,0\"\u003e\u003cb data-path-to-node=\"3,1,0\" data-index-in-node=\"0\"\u003eContact Rating:\u003c\/b\u003e 6 A @ 250 V AC \/ 30 V DC (Resistive).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,2,0\"\u003e\u003cb data-path-to-node=\"3,2,0\" data-index-in-node=\"0\"\u003eCoil Voltage:\u003c\/b\u003e \u003cb data-path-to-node=\"3,2,0\" data-index-in-node=\"14\"\u003e110 V DC\u003c\/b\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,3,0\"\u003e\u003cb data-path-to-node=\"3,3,0\" data-index-in-node=\"0\"\u003eTerminals:\u003c\/b\u003e Solder\/Plug-in (Blade style).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,4,0\"\u003e\u003cb data-path-to-node=\"3,4,0\" data-index-in-node=\"0\"\u003eDesign:\u003c\/b\u003e Non-polarized LED indicator and mechanical flag indicator.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,5,0\"\u003e\u003cb data-path-to-node=\"3,5,0\" data-index-in-node=\"0\"\u003eApprovals:\u003c\/b\u003e UL recognized, CSA certified, and CE marked.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"4\"\u003e\n\u003ch3 data-path-to-node=\"5\"\u003e\u003cb data-path-to-node=\"5\" data-index-in-node=\"0\"\u003eElevator Logic\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"6\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,0,0\"\u003e\u003cb data-path-to-node=\"6,0,0\" data-index-in-node=\"0\"\u003eDC Control Specialist:\u003c\/b\u003e Unlike the A110 (AC), the \u003cb data-path-to-node=\"6,0,0\" data-index-in-node=\"49\"\u003eD110\u003c\/b\u003e is used in systems where the control backbone is DC. Using an AC relay in this position will cause the coil to burn out or fail to pull in.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,1,0\"\u003e\u003cb data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003eBifurcated Contacts:\u003c\/b\u003e The RU series uses split contacts, providing superior reliability for \"dry\" (low-current) signals where standard contacts might fail due to surface oxidation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,2,0\"\u003e\u003cb data-path-to-node=\"6,2,0\" data-index-in-node=\"0\"\u003eDiagnostic Tools:\u003c\/b\u003e Includes a \u003cb data-path-to-node=\"6,2,0\" data-index-in-node=\"29\"\u003emechanical indicator flag\u003c\/b\u003e (shows if the contacts have physically moved) and an \u003cb data-path-to-node=\"6,2,0\" data-index-in-node=\"108\"\u003eLED\u003c\/b\u003e (shows if the coil is receiving power). This is vital for isolating mechanical failures from electrical ones.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,3,0\"\u003e\u003cb data-path-to-node=\"6,3,0\" data-index-in-node=\"0\"\u003eManual Latching:\u003c\/b\u003e Features a transient manual latching lever, allowing a technician to lock the relay in the \"on\" position for hands-free testing of downstream logic.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"7\"\u003e\n\u003ch3 data-path-to-node=\"8\"\u003e\u003cb data-path-to-node=\"8\" data-index-in-node=\"0\"\u003eAccessories\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"9\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,0,0\"\u003e\u003cb data-path-to-node=\"9,0,0\" data-index-in-node=\"0\"\u003eSM4S-05:\u003c\/b\u003e Standard 14-blade DIN rail or surface mount screw terminal socket.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,1,0\"\u003e\u003cb data-path-to-node=\"9,1,0\" data-index-in-node=\"0\"\u003eSM4S-62:\u003c\/b\u003e Finger-safe (IP20) DIN rail socket to meet modern safety requirements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,2,0\"\u003e\u003cb data-path-to-node=\"9,2,0\" data-index-in-node=\"0\"\u003eSFA-101:\u003c\/b\u003e Metal hold-down spring clip to ensure the relay remains seated during high-vibration operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,3,0\"\u003e\u003cb data-path-to-node=\"9,3,0\" data-index-in-node=\"0\"\u003eMarking Plates:\u003c\/b\u003e Snap-on tags for identifying the relay function (e.g., \"Safety Chain\" or \"Door Logic\").\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"10\"\u003e\n\u003ch3 data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eMaintenance \u0026amp; Code\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"12\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,0,0\"\u003e\u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003eB44\/ASME A17.1 Compliance:\u003c\/b\u003e You must ensure the replacement matches the \u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"71\"\u003e110 V DC\u003c\/b\u003e rating. Installing a 110V AC relay into a DC socket is a major code and safety violation that will lead to immediate component failure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,1,0\"\u003e\u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003ePolarity:\u003c\/b\u003e The RU4S features a \u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"30\"\u003enon-polarized LED\u003c\/b\u003e, meaning it will illuminate regardless of which way the DC positive\/negative leads are connected to the coil terminals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,2,0\"\u003e\u003cb data-path-to-node=\"12,2,0\" data-index-in-node=\"0\"\u003eContact Inspection:\u003c\/b\u003e The clear polycarbonate cover allows you to check for \"pitting\" or carbon buildup. If the mechanical flag is dropped but the circuit isn't completing, the contacts are likely fouled.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,3,0\"\u003e\u003cb data-path-to-node=\"12,3,0\" data-index-in-node=\"0\"\u003eOperational Temperature:\u003c\/b\u003e Rated for \u003cb data-path-to-node=\"12,3,0\" data-index-in-node=\"35\"\u003e-55°C to +70°C\u003c\/b\u003e, making it robust enough for unheated elevator machine rooms in Canadian winters.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"R.A.M. Parts","offers":[{"title":"Default Title","offer_id":47638891004056,"sku":null,"price":0.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/4369\/5000\/files\/rn-image_picker_lib_temp_920aeb65-2692-4bf0-9e0a-801a199e3184.jpg?v=1774302048","url":"https:\/\/parts4rem.ca\/products\/idec-ru4s-d110-relay","provider":"Parts4REM","version":"1.0","type":"link"}