{"product_id":"1791-24b8-allen-bradley-24v-dc-32-point-module-block-i-o","title":"1791-24B8 Allen-Bradley 24V DC 32 Point Module Block I\/O","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1791-24B8\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e179124B8\u003c\/strong\u003e Block I\/O Module, operates as a dedicated hardware component for discrete signal acquisition and actuation within industrial control networks.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown and Variant Designations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1791-24B8: Base catalog designation for the standard 32-point block I\/O unit.\u003c\/li\u003e\n\u003cli\u003e179124B8: Alternative numeric representation used for internal cataloging and spare parts inventory tracking.\u003c\/li\u003e\n\u003cli\u003e1791-24B8\/B: Revision B hardware build incorporating updated onboard filtering and terminal block layout configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Technical Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\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\u003e1791-24B8\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\u003e0.78 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e18 x 12.6 x 9.6 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC nominal supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e24 discrete inputs arranged in 3 groups of 8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e8 discrete outputs arranged in 1 group of 8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10 to 30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTariff Code\u003c\/td\u003e\n\u003ctd\u003e8538903000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Control and Network Architecture\u003c\/h3\u003e\n\u003cp\u003eConfigured for deterministic fieldbus architectures, the module executes discrete logic interfacing across Allen-Bradley remote I\/O topologies. The internal architecture manages high-density signal distribution by decoupling input power grouping from output switching channels. The unit processes field signals through optical isolation barriers to protect backplane communication buses from transient voltage spikes. Firmware flash compatibility ensures integration with legacy and transitional controller operating systems without requiring hardware replacement.\u003c\/p\u003e\n\u003ch3\u003eStandard Package Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 1791-24B8 Block I\/O Module\u003c\/li\u003e\n\u003cli\u003e1 x Removable Screw Terminal Block Set\u003c\/li\u003e\n\u003cli\u003e1 x Hardware Installation Instruction Sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Mechanical Deployment Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the module securely onto a standard DIN rail or directly to a backplate using designated mounting screw clearances.\u003c\/li\u003e\n\u003cli\u003eEnsure clear physical spacing around the enclosure perimeter to facilitate passive thermal dissipation during continuous operation.\u003c\/li\u003e\n\u003cli\u003eRoute high-voltage power lines and low-voltage signal cables through separate metallic conduit trays to minimize electromagnetic interference.\u003c\/li\u003e\n\u003cli\u003eTorque terminal block screws to manufacturer-specified limits to prevent intermittent contact resistance under vibration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the total point capacity of the module?\u003c\/p\u003e\n\u003cp\u003eThe module provides 32 total points, segregated into 24 inputs and 8 outputs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow are the input points configured internally?\u003c\/p\u003e\n\u003cp\u003eThe 24 inputs are divided electrically into 3 isolated groups of 8 points each.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the operational voltage range for the outputs?\u003c\/p\u003e\n\u003cp\u003eThe output channels operate within a direct current voltage range of 10 to 30 VDC.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the module support hot-swapping capabilities?\u003c\/p\u003e\n\u003cp\u003eHot-swapping is not recommended while system power and field-side excitation remain energized.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat protocol does the unit utilize for communication?\u003c\/p\u003e\n\u003cp\u003eThe module communicates across proprietary industrial block I\/O and remote scanner network links.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs the module still actively manufactured?\u003c\/p\u003e\n\u003cp\u003eNo, the unit was officially discontinued by the manufacturer on June 29, 2015.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the total physical weight of the hardware unit?\u003c\/p\u003e\n\u003cp\u003eThe unit weighs approximately 0.78 kg excluding packaging materials.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat tariff code applies to international shipments of this part?\u003c\/p\u003e\n\u003cp\u003eThe assigned international commercial tariff code is 8538903000.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066454003885,"sku":"1791-24B8","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1791-24B8_13.jpg?v=1785426610","url":"https:\/\/www.maxwellplc.com\/ga\/products\/1791-24b8-allen-bradley-24v-dc-32-point-module-block-i-o","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}