{"product_id":"allen-bradley-1756-ox8i-a-controllogix-isolated-relay-output-module","title":"Allen-Bradley 1756-OX8I\/A ControlLogix Isolated Relay Output Module","description":"\u003ch2\u003eAllen-Bradley 1756-OX8I\/A ControlLogix Isolated Relay Output Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1756-OX8I\/A\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1756-OX8I\u003c\/strong\u003e Isolated Relay Output Module, operates as a dedicated hardware component for relay-based discrete signal switching within ControlLogix I\/O chassis systems. The module provides 8 individually isolated Form C relay outputs for AC and DC field device control.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\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\u003e1756-OX8I\/A\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\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eOpen style, 1-slot ControlLogix chassis module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eNot specified in provided data\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eIsolated Relay Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eBulletin 1756 ControlLogix I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e8 individually isolated relay outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eMechanical relay contact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Configuration\u003c\/td\u003e\n\u003ctd\u003eForm C (SPDT)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC Voltage Range\u003c\/td\u003e\n\u003ctd\u003e5-125 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC Voltage Range\u003c\/td\u003e\n\u003ctd\u003e5-240 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Output Current\u003c\/td\u003e\n\u003ctd\u003e2 A DC, 2 A AC resistive load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003e36-pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eChannel-to-channel isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagnostics\u003c\/td\u003e\n\u003ctd\u003eField-side diagnostics and fault detection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to 85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003eUp to 95% RH, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration Resistance\u003c\/td\u003e\n\u003ctd\u003e2 m\/s2, 500 Hz maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Control and Relay Output Architecture\u003c\/h3\u003e\n\u003cp\u003eThe 1756-OX8I\/A uses individually isolated relay channels to provide separate field switching paths within the ControlLogix platform. The Form C SPDT contact structure supports normally open and normally closed switching states for discrete actuators, contactors, indicators, and other field devices.\u003c\/p\u003e\n\u003cp\u003eThe module operates through ControlLogix backplane communication and supports I\/O density scaling through 8 relay output points in a single chassis slot. The isolated relay structure separates output circuits, reducing electrical interaction between independent field connections.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What type of loads can the 1756-OX8I\/A control?\u003cbr\u003eA: The module controls AC and DC discrete loads through mechanical relay contacts. The supported ranges are 5-125 VDC and 5-240 VAC.\u003c\/p\u003e\n\u003cp\u003eQ: Are all relay outputs isolated from each other?\u003cbr\u003eA: Yes. Each of the 8 relay outputs provides individual channel-to-channel isolation for separate field wiring.\u003c\/p\u003e\n\u003cp\u003eQ: What contact arrangement is used by the relay outputs?\u003cbr\u003eA: The module uses Form C (SPDT) relay contacts, providing normally open and normally closed switching capability.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1756-OX8I\/A module in an approved ControlLogix chassis slot and verify that the correct 36-pin interface connection is secured before applying power.\u003c\/p\u003e\n\u003cp\u003eSeparate relay output wiring from low-level analog or communication cables where possible to reduce electrical interference. Confirm field load voltage and current requirements before connection. Use appropriate grounding and shielding practices for the installed control cabinet environment.\u003c\/p\u003e\n\u003cp\u003eInspect terminal connections periodically to maintain proper mechanical contact integrity and verify that relay switching circuits remain within specified electrical limits.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43624008220762,"sku":"1756-OX8I\/A","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-OX8IA2.jpg?v=1783578236","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-ox8i-a-controllogix-isolated-relay-output-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}