{"product_id":"allen-bradley-1746-ox8-relay-output-module","title":"Allen-Bradley 1746-OX8 Relay Output Module","description":"\u003ch1\u003eAllen-Bradley 1746-OX8 Relay Output Module\u003c\/h1\u003e\n\u003cp\u003eConfigured for discrete load switching in SLC 500 backplane architectures, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-OX8\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1746-OX8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoutput module, provides direct electromechanical execution of control signals through isolated relay contacts within an eight-channel output matrix.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"last:pe-10\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1746-OX8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.00 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eApprox. 8.6 W total heat dissipation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eIsolated relay outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Category\u003c\/td\u003e\n\u003ctd\u003eAC\/DC relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5 to 265 VAC \/ 5 to 125 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Load\u003c\/td\u003e\n\u003ctd\u003e5 A per point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Delay\u003c\/td\u003e\n\u003ctd\u003e10 ms max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShock Rating\u003c\/td\u003e\n\u003ctd\u003e10 G\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBackplane Interface \u0026amp; Isolated Relay Switching (SLC 500 Architecture)\u003c\/h3\u003e\n\u003cp\u003eThe 1746-OX8 module executes output state transitions through SLC 500 backplane scan cycles, where logic-level commands are translated into relay coil energization events. Each output channel is individually isolated, preventing electrical coupling between field circuits.\u003c\/p\u003e\n\u003cp\u003eRelay contacts provide galvanically separated switching paths for AC and DC loads. The mechanical switching structure introduces a fixed actuation delay, with a maximum 10 ms response for both ON and OFF transitions.\u003c\/p\u003e\n\u003cp\u003eThermal dissipation is distributed across relay groups, with per-point heat generation contributing to total module thermal load. Terminal block design uses removable screw terminals for discrete field wiring separation.\u003c\/p\u003e\n\u003ch3\u003eHazardous Location Output Isolation Behavior\u003c\/h3\u003e\n\u003cp\u003eThe module supports operation in Class 1, Division 2 classified environments through inherent relay contact isolation and physical separation of energized circuits. Output channels remain electrically independent, reducing cross-channel conduction paths under mixed AC\/DC switching conditions.\u003c\/p\u003e\n\u003cp\u003eRelay contact architecture provides fail-open mechanical state behavior when coil energization is removed, ensuring deterministic output deactivation under loss-of-control conditions. Backplane logic remains electrically segregated from field voltage domains via internal isolation barriers.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: What is the switching delay of the 1746-OX8 relay outputs?\u003cbr\u003eA: Maximum signal delay is 10 ms for both ON and OFF transitions, determined by mechanical relay actuation time.\u003c\/p\u003e\n\u003cp\u003eQ: Are outputs electrically isolated between channels?\u003cbr\u003eA: Yes, each output is individually isolated using relay contact separation, preventing direct electrical coupling between channels.\u003c\/p\u003e\n\u003cp\u003eQ: Can the module handle both AC and DC loads simultaneously?\u003cbr\u003eA: Yes, the relay contact structure supports mixed AC and DC switching within rated voltage and current limits per channel.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eThe module must be inserted into a powered-down SLC 500 rack to avoid backplane transient states during seating. Screw terminal connections must be tightened to ensure stable contact resistance under vibration conditions.\u003c\/p\u003e\n\u003cp\u003eField wiring should be separated by voltage class (AC vs DC) to prevent unintended coupling on relay contact outputs. Shielded cable grounding should be terminated at a single-point earth reference within the control cabinet.\u003c\/p\u003e\n\u003cp\u003eRelay load circuits must remain within specified current limits to prevent contact erosion and thermal accumulation at terminal junctions.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43537334042714,"sku":"1746-OX8","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1746-OX82.jpg?v=1782199556","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1746-ox8-relay-output-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}