{"product_id":"compactblock-i-o-module-allen-bradley-1791d-4b4p","title":"CompactBlock I\/O Module | Allen-Bradley 1791D-4B4P","description":"\u003cp\u003eThe \u003cstrong\u003e1791D-4B4P\u003c\/strong\u003e is a CompactBlock I\/O combination base block manufactured by Allen-Bradley for industrial automation networks. This discrete I\/O module integrates 4 sink DC inputs and 4 source DC outputs, operating on a 24 VDC power supply. Designed to communicate over the DeviceNet network protocol, it delivers reliable distributed machine control while minimizing panel space requirements in factory floor environments.\u003c\/p\u003e\n\u003ch3\u003eI\/O Architecture and Channel Configuration\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1791D-4B4P\u003c\/strong\u003e features a combination base block design housing both input and output channels in a single compact housing. It includes four digital sink inputs and four digital source outputs, accommodating standard field sensors and actuators operating at 24 VDC. This integrated layout reduces wiring complexity and streamlines hardware footprints for discrete control systems.\u003c\/p\u003e\n\u003ch3\u003eCommunication and Power Requirements\u003c\/h3\u003e\n\u003cp\u003eOperating on a standard 24 VDC nominal supply, the module interfaces directly with DeviceNet communication networks for real-time data exchange with programmable logic controllers. Its distributed I\/O architecture enables seamless integration into machine-level control topologies, reducing main trunk cable lengths while maintaining high-speed signal transmission across industrial automation nodes.\u003c\/p\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\u003e1791D-4B4P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley (Rockwell Automation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eCompactBlock I\/O Combination Base Block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocol\u003c\/td\u003e\n\u003ctd\u003eDeviceNet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Type\u003c\/td\u003e\n\u003ctd\u003e4 Sink Digital Inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003e4 Source Digital Outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Operating Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.65 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLifecycle Status\u003c\/td\u003e\n\u003ctd\u003eDiscontinued by Manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cp\u003eQ: What type of network protocol does the 1791D-4B4P module support? A: The module supports the DeviceNet communication protocol, allowing it to connect directly to compatible industrial networks and controllers.\u003c\/p\u003e\n\u003cp\u003eQ: What is the channel configuration for this combination base block? A: It features a combination of four digital sink inputs and four digital source outputs, operating on a 24 VDC power supply.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":53056665977112,"sku":"1791D-4B4P","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/1791D-OB16P_Cocoai_bca76d91-0060-4aa7-ae92-18474a41db72.jpg?v=1790734271","url":"https:\/\/www.innoplcsync.com\/products\/compactblock-i-o-module-allen-bradley-1791d-4b4p","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}