{"product_id":"allen-bradley-1746-ob32-d-slc-500-digital-output-module","title":"Allen-Bradley 1746-OB32\/D SLC 500 Digital Output Module","description":"\u003ch1\u003eAllen-Bradley 1746-OB32\/D SLC 500 Digital Output Module\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-OB32\/D\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1746-OB32\/D\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edigital output module, serves as a discrete output execution unit for 24 VDC sourcing signal switching within SLC 500 backplane-based control architectures. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-OB32\/D\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1746-OB32\/D\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edigital output module) provides direct electrical actuation of field loads across 32 independent output points under SLC 500 chassis communication.\u003c\/p\u003e\n\u003cp\u003eThe module interfaces with the SLC 500 backplane to execute digital state transitions driven by controller scan cycles. Output switching is implemented through solid-state sourcing channels designed for mixed inductive, capacitive, and resistive load environments.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"last:pe-10\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\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\u003e1746-OB32\/D\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\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e50 mm x 45 mm x 24 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-10 deg C to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Points\u003c\/td\u003e\n\u003ctd\u003e32 channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003e24 VDC sourcing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad Capacity\u003c\/td\u003e\n\u003ctd\u003e5 A @ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Rating\u003c\/td\u003e\n\u003ctd\u003e10 A @ 250 VAC \/ 10 A @ 30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Class\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eSLC 500 backplane \/ Modbus RTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSLC 500 Backplane I\/O Density Scaling and Output Switching Behavior\u003c\/h3\u003e\n\u003cp\u003eThe 1746-OB32\/D implements high-density discrete output mapping across a 32-channel architecture, with each channel addressed through backplane scan synchronization. I\/O density scaling is achieved by consolidating multiple output points into a compact module footprint while maintaining independent channel switching boundaries.\u003c\/p\u003e\n\u003cp\u003eBackplane communication is executed via deterministic scan cycles inherent to the SLC 500 chassis, where output state updates are latched at the end of each processor scan. The module supports mixed load switching, with internal channel grouping designed to distribute thermal and electrical stress across the output array.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1746-OB32\/D outputs be hot-swapped during system operation?\u003cbr\u003eA: No hot-swap operation is supported. Module removal requires chassis power-down to avoid backplane disturbance.\u003c\/p\u003e\n\u003cp\u003eQ: Does each output channel operate independently under the backplane scan?\u003cbr\u003eA: Yes. Each of the 32 channels is individually addressed and updated per SLC 500 scan cycle.\u003c\/p\u003e\n\u003cp\u003eQ: What is the limiting factor for simultaneous output loading?\u003cbr\u003eA: The constraint is defined by aggregate current capacity across the module and per-channel thermal dissipation limits within the 5 A @ 24 VDC specification.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1746-OB32\/D into a compatible SLC 500 chassis slot with correct backplane alignment. Ensure chassis power is removed prior to insertion or removal to prevent bus disturbance.\u003c\/p\u003e\n\u003cp\u003eField wiring shall be terminated according to terminal assignment drawings, with attention to correct polarity for 24 VDC sourcing outputs. Cable routing must separate output conductors from high-frequency switching or high-voltage AC lines to minimize induced coupling.\u003c\/p\u003e\n\u003cp\u003eVerify grounding continuity of the control cabinet before energization. All output loads should be individually fused where inductive switching transients are expected.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43537201365082,"sku":"1746-OB32\/D","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1746-OB321.jpg?v=1781686006","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1746-ob32-d-slc-500-digital-output-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}