{"product_id":"allen-bradley-1794-ow8-a-digital-relay-output-module","title":"Allen-Bradley 1794-OW8\/A Digital Relay Output Module","description":"\u003ch2\u003eAllen-Bradley \u003cstrong\u003e1794-OW8\/A\u003c\/strong\u003e Digital Relay Output Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1794-OW8\/A\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1794-OW8\u003c\/strong\u003e Digital Relay Output Module, operates as a dedicated hardware component for discrete load switching within the Allen-Bradley FLEX I\/O system. The module provides eight isolated Form A relay contacts for PLC-controlled AC and DC field device actuation.\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\u003e1794-OW8 \/ Series 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\u003eRockwell Automation FLEX I\/O product family\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.2 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5.5 W maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDigital Relay Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e8 normally open (Form A) relay channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e5...264 V AC \/ 5...125 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Rating\u003c\/td\u003e\n\u003ctd\u003e2.0 A per channel continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Current Rating\u003c\/td\u003e\n\u003ctd\u003e14.4 A continuous across all channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexBus Current Demand\u003c\/td\u003e\n\u003ctd\u003e80 mA @ 5 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e250 V AC continuous channel-to-channel and channel-to-bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Response Time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;= 10 ms ON to OFF and OFF to ON\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStatus Indicators\u003c\/td\u003e\n\u003ctd\u003e8 yellow output channel LEDs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eEtherNet\/IP and FLEX I\/O Backplane Integration\u003c\/h3\u003e\n\u003cp\u003eThe 1794-OW8 interfaces with the FLEX I\/O platform through the terminal base assembly and FlexBus communication structure. The module receives output commands from the controller through the I\/O adapter network and transfers the logic state to individual electromechanical relay contacts.\u003c\/p\u003e\n\u003cp\u003eThe FLEX I\/O architecture supports I\/O density scaling through modular terminal base installation. The 1794-OW8 allows field wiring retention during module replacement when compatible terminal base hardware is used. The module uses firmware flash compatibility defined by the FLEX I\/O platform for controller and adapter communication matching.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1794-OW8 switch mixed AC and DC voltage sources on different channels?\u003cbr\u003eA: Yes. Each relay output channel is individually isolated, allowing separate AC or DC voltage sources to be controlled through different Form A contact outputs within the module ratings.\u003c\/p\u003e\n\u003cp\u003eQ: Does the 1794-OW8 require field wiring removal during replacement?\u003cbr\u003eA: When installed on a compatible FLEX I\/O terminal base unit, the module design allows removal and replacement without disconnecting field wiring.\u003c\/p\u003e\n\u003cp\u003eQ: What is the FlexBus current requirement of the 1794-OW8 module?\u003cbr\u003eA: The module requires 80 mA at 5 V DC from the FlexBus interface.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall the 1794-OW8 on the specified FLEX I\/O terminal base assembly before applying field power.\u003c\/li\u003e\n\u003cli\u003eVerify relay contact wiring corresponds to the required normally open (Form A) switching function.\u003c\/li\u003e\n\u003cli\u003eMaintain separation between AC power wiring, DC control wiring, and low-level signal wiring to reduce electrical interference.\u003c\/li\u003e\n\u003cli\u003eConnect cable shields according to the system grounding design and avoid parallel routing with high-current conductors.\u003c\/li\u003e\n\u003cli\u003eConfirm field load current does not exceed the relay contact rating for each individual output channel.\u003c\/li\u003e\n\u003cli\u003eVerify controller communication, FlexBus connection, and module status indicators before placing the output channels into service.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43782748635226,"sku":"1794-OW8\/A","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1794-OW8A2.jpg?v=1785814612","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1794-ow8-a-digital-relay-output-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}