{"product_id":"allen-bradley-1746-ob32-slc-500-digital-dc-output-module","title":"Allen-Bradley 1746-OB32 SLC 500 Digital DC Output Module","description":"\u003ch1\u003eAllen-Bradley 1746-OB32 SLC 500 Digital DC Output Module\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-OB32\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1746-OB32 SLC 500 digital DC output module\u003c\/strong\u003e, serves as the primary\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSLC 500 32-point DC sourcing output module\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eutilized to execute high-density discrete load switching across SLC 500 backplane-controlled rack systems. Configured for 24 VDC transistor-based output control in SLC 500 architectures, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-OB32\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides direct electrical switching of 32 field channels via two isolated output groups managed through 5 VDC backplane logic.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eNo suffix segmentation is defined in the provided documentation. The 1746-OB32 is treated as a fixed configuration module within the SLC 500 digital output family.\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\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\u003eUS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.37 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eBackplane: 190 mA @ 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eDC sourcing transistor outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Groups\u003c\/td\u003e\n\u003ctd\u003e2 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePoints Per Common\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Output Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Range\u003c\/td\u003e\n\u003ctd\u003e5 to 50 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSLC 500 Backplane Bus and High-Density Output Scaling Behavior\u003c\/h3\u003e\n\u003cp\u003eThe 1746-OB32 interfaces with the SLC 500 backplane via 5 VDC logic-level communication, drawing 190 mA for internal opto-isolation and transistor gate drive structures. Output architecture is partitioned into two 16-point commons, enabling structured current return paths and segmented field wiring distribution.\u003c\/p\u003e\n\u003cp\u003eChannel activation is synchronized with PLC scan cycles, where ON\/OFF transitions are executed through semiconductor switching elements with deterministic latency defined by internal propagation and load-dependent response. High-density output scaling is constrained by thermal dissipation across the module body and cumulative channel loading under continuous operation.\u003c\/p\u003e\n\u003cp\u003eThe transistor-based sourcing topology eliminates mechanical wear mechanisms while introducing defined leakage and voltage drop characteristics during OFF-state and conduction phases.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1746-OB32 be hot-swapped while the SLC 500 rack is energized?\u003cbr\u003eA: Hot-swapping is not specified. Module insertion or removal should be performed with system power removed to avoid backplane disturbance.\u003c\/p\u003e\n\u003cp\u003eQ: How is backplane current distributed across the module?\u003cbr\u003eA: The module draws a fixed 190 mA @ 5 VDC from the backplane regardless of output switching activity.\u003c\/p\u003e\n\u003cp\u003eQ: What limits simultaneous channel loading on the 32 outputs?\u003cbr\u003eA: Limitation is defined by per-point current rating, total module current capacity, and thermal dissipation constraints across both output groups.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the module into a compatible SLC 500 rack slot ensuring full backplane connector engagement. Output wiring must be terminated into the two 16-point common groups with correct segregation to maintain return path integrity.\u003c\/p\u003e\n\u003cp\u003eMaintain separation between DC output wiring and high-voltage conductors to reduce electromagnetic coupling across densely packed channels. Use appropriate conductor sizing to match per-channel current limits under continuous operation.\u003c\/p\u003e\n\u003cp\u003eVerify load compatibility within the 5 to 50 VDC operating range prior to energization. Inductive loads require external suppression components to mitigate switching transients during transistor turn-off events.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43510793142362,"sku":"1746-OB32","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1746-OB322.jpg?v=1781686006","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1746-ob32-slc-500-digital-dc-output-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}