{"product_id":"allen-bradley-1771-oa-ac-output-module","title":"Allen Bradley 1771-OA AC Output Module","description":"\u003ch2\u003eAllen Bradley 1771-OA AC Output Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen Bradley 1771-OA\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1771-OA\u003c\/strong\u003e AC Output Module, operates as a dedicated hardware component for discrete AC switching control within PLC-5 1771 I\/O chassis platforms. The module provides eight 120 VAC solid-state output channels with rack-mounted installation and field wiring through the 1771-WA wiring arm.\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\u003e1771-OA\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\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.61 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.1-10.7 W power dissipation; 210 mA backplane current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eAC Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003ePLC-5 \/ 1771 Product Bulletin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e8 Outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eDiscrete AC solid-state output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e120 VAC nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e92-138 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Frequency\u003c\/td\u003e\n\u003ctd\u003e47-63 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous Current Per Output\u003c\/td\u003e\n\u003ctd\u003e1.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Current Per Module\u003c\/td\u003e\n\u003ctd\u003e6 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e3.4-36.6 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Format\u003c\/td\u003e\n\u003ctd\u003eBDC or Natural Binary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Delay (AC Off)\u003c\/td\u003e\n\u003ctd\u003e45 +\/- 15 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Chassis\u003c\/td\u003e\n\u003ctd\u003e1771 I\/O chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring Arm Compatibility\u003c\/td\u003e\n\u003ctd\u003e1771-WA \/ 1771-WH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eRack mountable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKeying Position\u003c\/td\u003e\n\u003ctd\u003eBetween 4 and 6; Between 12 and 14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePLC-5 AC Output Switching Interface\u003c\/h3\u003e\n\u003cp\u003eThe 1771-OA provides eight discrete AC output channels for PLC-5 controller applications. Each channel switches 120 VAC field loads within the specified voltage range and supports continuous output current up to 1.5 A per channel.\u003c\/p\u003e\n\u003cp\u003eThe module communicates through the 1771 chassis backplane and integrates with PLC-5 I\/O density scaling configurations. The single-slot design allows installation in compatible 1771 I\/O chassis assemblies.\u003c\/p\u003e\n\u003cp\u003eThe module uses PLC-5 deterministic backplane communication for output command transfer. BDC and Natural Binary data formats are supported for controller data table compatibility.\u003c\/p\u003e\n\u003ch3\u003eIndustrial Control and Backplane Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe 1771-OA uses Allen Bradley 1771 platform hardware architecture with rack-based I\/O addressing. Backplane bus communication transfers output state information between the PLC processor and the module electronics.\u003c\/p\u003e\n\u003cp\u003eThe module supports firmware flash compatibility practices applicable to the PLC-5 hardware generation. Configuration depends on chassis slot assignment, processor compatibility, and installed I\/O addressing parameters.\u003c\/p\u003e\n\u003cp\u003eThe AC output circuitry is isolated from PLC logic through the module design to separate field voltage switching from controller signal processing.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How many output channels are available on the 1771-OA module?\u003cbr\u003eA: The 1771-OA provides eight discrete AC output channels.\u003c\/p\u003e\n\u003cp\u003eQ: What is the rated output voltage of the 1771-OA?\u003cbr\u003eA: The module provides 120 VAC nominal output with an operating range of 92-138 VAC.\u003c\/p\u003e\n\u003cp\u003eQ: What backplane current is required by the 1771-OA?\u003cbr\u003eA: The module requires 210 mA backplane current from the 1771 I\/O chassis supply.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1771-OA module in a compatible 1771 I\/O chassis slot and verify chassis keying before insertion. Use the designated 1771-WA or 1771-WH wiring arm for field connections.\u003c\/p\u003e\n\u003cp\u003eRoute AC output wiring separately from low-level analog signal cables and communication wiring to reduce electrical interference. Verify field device voltage ratings and load current requirements before energizing outputs.\u003c\/p\u003e\n\u003cp\u003eTighten wiring connections according to the specified terminal hardware requirements. Confirm output addressing, chassis configuration, and PLC-5 controller programming before commissioning the module.\u003c\/p\u003e\n\u003cp\u003eFollow electrostatic discharge precautions when handling the module during installation or maintenance.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43684798300250,"sku":"1771-OA","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1771-OA2.jpg?v=1784617467","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1771-oa-ac-output-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}