{"product_id":"allen-bradley-1746-oa8-ac-output-module","title":"Allen Bradley 1746-OA8 AC Output Module","description":"\u003ch2\u003eAllen‑Bradley 1746‑OA8 AC Output Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen‑Bradley 1746‑OA8\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1746‑OA8\u003c\/strong\u003e output module, serves as the primary AC output card used to execute discrete actuation across SLC 500 backplane platforms. It provides eight output points with fixed AC‑rated switching behavior and defined leakage characteristics.\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\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003e1746‑OA8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAllen‑Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temp\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Consumption\u003c\/th\u003e\n\u003ctd\u003e0.185 A @ 5 VDC (backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eAC Output Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eSLC 500 (1746)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVoltage Category\u003c\/th\u003e\n\u003ctd\u003e120\/240 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Outputs\u003c\/th\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePoints per Common\u003c\/th\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Voltage\u003c\/th\u003e\n\u003ctd\u003e85–265 VAC @ 47–63 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSignal Delay\u003c\/th\u003e\n\u003ctd\u003e1 ms ON, 11 ms OFF (resistive load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOff‑State Leakage\u003c\/th\u003e\n\u003ctd\u003e2 mA max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity Licenses\u003c\/h3\u003e\n\u003cp\u003eThe 1746‑OA8 participates in deterministic backplane timing used across SLC 500 architectures. Output transitions follow fixed AC‑cycle‑dependent propagation intervals, ensuring predictable actuation during processor scan execution. I\/O density scaling allows multiple AC output modules to coexist without altering backplane propagation delay. Firmware flash compatibility resides entirely within the SLC processor; the OA8 contains no programmable logic and maintains stable electrical behavior across controller revisions.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1746‑OA8 be hot‑swapped? A: No. AC output modules must be inserted or removed only when the chassis is de‑energized to avoid undefined output states.\u003c\/p\u003e\n\u003cp\u003eQ: Does the module support DC loads? A: No. The 1746‑OA8 is designed exclusively for AC output operation.\u003c\/p\u003e\n\u003cp\u003eQ: How does off‑state leakage affect connected loads? A: High‑impedance loads may detect small leakage currents; resistive or properly rated loads eliminate false activation.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRoute AC wiring separately from low‑level analog or digital circuits to reduce noise coupling.\u003c\/li\u003e\n\u003cli\u003eEnsure proper conductor torque at terminal blocks to prevent thermal loosening.\u003c\/li\u003e\n\u003cli\u003eMaintain correct load ratings to avoid exceeding per‑point current limits.\u003c\/li\u003e\n\u003cli\u003eVerify backplane power capacity when installing multiple high‑current modules.\u003c\/li\u003e\n\u003cli\u003eLabel field wiring to support maintenance and fault tracing.\u003c\/li\u003e\n\u003cli\u003eMaintain non‑condensing humidity conditions to prevent terminal oxidation.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48225503838398,"sku":"1746-OA8","price":630.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/allen-bradley-1746-no4i-analog-output-module-dkyfm5aqac0.png?v=1759031214","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1746-oa8-ac-output-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}