{"product_id":"1769-oa8-rockwell-automation-120v-240v-solid-state-output-unit","title":"1769-OA8 Rockwell Automation 120V\/240V Solid State Output Unit","description":"\u003ch3\u003e\u003cstrong\u003eEngineering Architecture\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1769-OA8\u003c\/strong\u003e module operates as a high-reliability discrete AC output interface within the Rockwell Automation \u003cstrong\u003eCompactLogix\u003c\/strong\u003e product ecosystem. Engineered with solid-state switching circuitry, this unit delivers 8 discrete output channels divided into two isolated groups of four, designed to drive heavy industrial alternating current loads.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Parameters and Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"5\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation \/ Allen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1769-compactlogix\"\u003eCompactLogix\u003c\/a\u003e (Compact I\/O)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel \/ Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e1769-OA8\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDiscrete AC Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 points (2 groups of 4 channels)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage Category\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\/240 Volts AC nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e85 to 265 Volts AC (47 to 63 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSignal Delay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/2 cycle turn-on, 1\/2 cycle turn-off max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackplane Current Draw\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145 mA at +5V DC line (1.125W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Dissipation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.12 Watts maximum (thermal output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply Distance Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 modules maximum from system power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003ePhysical Mounting and Installation Guidelines\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the \u003cstrong\u003e1769-OA8\u003c\/strong\u003e module securely onto standard DIN rails or directly to an industrial enclosure panel mounting plate.\u003c\/li\u003e\n\u003cli\u003eEnsure the unit sits within the strict 8-module power supply distance limit relative to units like the \u003cstrong\u003e1769-PA2\u003c\/strong\u003e or \u003cstrong\u003e1769-PB4\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eTerminate field wiring securely using solid (22 to 14 AWG) or stranded (22 to 16 AWG) copper conductors.\u003c\/li\u003e\n\u003cli\u003eLock adjacent bus connectors firmly to establish clean electrical backplane communication across the Compact I\/O rack.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eBuilt-in Diagnostics and System Health Monitoring\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFront-panel LED indicators display real-time operational status for each of the 8 individual output channels.\u003c\/li\u003e\n\u003cli\u003eInternal thermal monitoring protects solid-state switching components against excessive heat dissipation during continuous loads.\u003c\/li\u003e\n\u003cli\u003eSoftware-configurable module inhibition and packet interval parameters assist in tracking communication health.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eCompatibility and Network Scalability\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDirectly compatible with \u003cstrong\u003eCompactLogix\u003c\/strong\u003e controllers and MicroLogix 1500 base units.\u003c\/li\u003e\n\u003cli\u003eIntegrates smoothly into distributed architectures using \u003cstrong\u003e1769-ADN\u003c\/strong\u003e DeviceNet or \u003cstrong\u003e1769-AENTR\u003c\/strong\u003e Ethernet adapters.\u003c\/li\u003e\n\u003cli\u003eIndependent AC common terminals for each 4-channel group permit simultaneous operation across different voltage categories.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eLogistics and Warranty Terms\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBacked by a dependable \u003cstrong\u003e12-month warranty\u003c\/strong\u003e covering mechanical and electrical manufacturing defects.\u003c\/li\u003e\n\u003cli\u003eExpedited worldwide shipping coordinated through premium global carriers including \u003cstrong\u003eFedEx\u003c\/strong\u003e, \u003cstrong\u003eUPS\u003c\/strong\u003e, and \u003cstrong\u003eDHL\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eGuaranteed order preparation and dispatch within \u003cstrong\u003e24-48 hours\u003c\/strong\u003e of verification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTarget Equipment and Typical Application Scenarios\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIndustrial motor starter panels requiring robust switching of 120V AC and 240V AC control circuits.\u003c\/li\u003e\n\u003cli\u003eConveying systems driving heavy solenoid actuators, pneumatic valves, and electromagnetic brake coils.\u003c\/li\u003e\n\u003cli\u003eHVAC fan control panels and variable frequency drive auxiliary contactors requiring reliable solid-state output.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eGlobal PLC Spare HUB's Insight and Field Experience\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eControl engineers integrating the \u003cstrong\u003e1769-OA8\u003c\/strong\u003e must carefully map out the 8-module power supply distance restriction to prevent voltage drop anomalies on the internal 5V backplane bus. Field experience shows that grouping inductive loads like motor starters with external snubber networks or suppression diodes significantly extends the lifespan of the solid-state TRIAC switches. Furthermore, leveraging the split group design allows technicians to segregate 120V AC control loops from 240V AC actuators safely on a single physical module.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What selection factors dictate choosing the 1769-OA8 AC output module over DC transistor output versions?\u003c\/strong\u003e\u003cbr\u003eA: Choose the \u003cstrong\u003e1769-OA8\u003c\/strong\u003e when your field actuators require standard 120V\/240V AC power lines, eliminating the need for intermediate interposing relays.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the two separate 4-channel output groups operate at completely different AC voltages simultaneously?\u003c\/strong\u003e\u003cbr\u003eA: Yes, each group features an independent AC common terminal, allowing Group 1 to switch 120V AC while Group 2 handles 240V AC.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What troubleshooting steps apply if an output channel LED illuminates but the connected field load fails to energize?\u003c\/strong\u003e\u003cbr\u003eA: Check the corresponding group common terminal voltage, inspect external fuse continuity, and verify that field wiring is securely clamped.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the 1769-OA8 module require an external power supply to switch field load current?\u003c\/strong\u003e\u003cbr\u003eA: Yes, the module switches external 85 to 265V AC line power supplied directly to the load circuits rather than sourcing voltage internally.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does exceeding the 8-module power supply distance rating affect system performance?\u003c\/strong\u003e\u003cbr\u003eA: Exceeding this limit starves the module of necessary backplane current, resulting in communication timeouts and erratic switching behavior.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013811298486,"sku":"1769-OA8","price":172.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1769-OA8_34637638-a66f-46f0-8b3e-5384876db90a.jpg?v=1788944906","url":"https:\/\/www.plcsparehub.com\/products\/1769-oa8-rockwell-automation-120v-240v-solid-state-output-unit","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}