{"product_id":"allen-bradley-1791d-16b0x-compactblock-i-o-expansion-module","title":"Allen-Bradley 1791D-16B0X CompactBlock I\/O Expansion Module","description":"\u003ch2\u003eAllen-Bradley 1791D-16B0X CompactBlock I\/O Expansion Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for 24 VDC discrete signal acquisition in DeviceNet CompactBlock I\/O networks, the \u003cstrong\u003eAllen-Bradley 1791D-16B0X\u003c\/strong\u003e (\u003cstrong\u003e1791D-16B0X\u003c\/strong\u003e Expansion Module) provides direct physical\/electrical execution through 16 sinking input channels.\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\u003e1791D-16B0X\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eCompactBlock I\/O Expansion Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003eCompactBlock I\/O 1791D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.55 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interface\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\u003eSinking discrete inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e16 inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e0 outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Groups\u003c\/td\u003e\n\u003ctd\u003e2 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal Nominal\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal Range\u003c\/td\u003e\n\u003ctd\u003e10-30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput On-state Voltage\u003c\/td\u003e\n\u003ctd\u003e10 VDC minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput On-state Current\u003c\/td\u003e\n\u003ctd\u003e11 mA maximum at 30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Off-state Voltage\u003c\/td\u003e\n\u003ctd\u003e5 VDC maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Off-state Current\u003c\/td\u003e\n\u003ctd\u003e1.5 mA maximum at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eIEC IP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLED Indicators\u003c\/td\u003e\n\u003ctd\u003eMod\/Net status red\/green, Logic status green, I\/O status yellow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Exchange Modes\u003c\/td\u003e\n\u003ctd\u003ePoll, Cyclic, Change of State (CoS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Rate\u003c\/td\u003e\n\u003ctd\u003e125 Kbps, 250 Kbps, 500 Kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eEtherNet\/IP and Industrial Control Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe 1791D-16B0X uses DeviceNet communication for distributed I\/O data exchange with PLC, SLC, and SoftLogix controllers through compatible DeviceNet scanners. The CompactBlock I\/O architecture provides distributed I\/O density scaling for remote discrete input applications.\u003c\/p\u003e\n\u003cp\u003eDeviceNet communication supports Poll, Cyclic, and Change of State (CoS) I\/O exchange methods. Network configuration requires matching scanner parameters, node addressing, and controller firmware compatibility with the installed CompactBlock I\/O module.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1791D-16B0X provide output channels?\u003cbr\u003eA: No. The module contains 16 sinking DC input channels and does not provide output channels.\u003c\/p\u003e\n\u003cp\u003eQ: What DeviceNet communication methods are supported?\u003cbr\u003eA: The module supports Poll, Cyclic, and Change of State (CoS) I\/O exchange methods.\u003c\/p\u003e\n\u003cp\u003eQ: How are the input channels arranged internally?\u003cbr\u003eA: The 16 inputs are arranged as two groups of eight channels for field wiring organization.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1791D-16B0X in an enclosure environment compatible with the IEC IP20 protection rating. Ensure adequate mechanical support and access for DeviceNet and field wiring connections.\u003c\/p\u003e\n\u003cp\u003eRoute DeviceNet communication cables separately from high-voltage power conductors to reduce electrical interference. Follow DeviceNet network wiring practices for cable type, termination, and node connection.\u003c\/p\u003e\n\u003cp\u003eConnect 24 VDC field input devices according to the sinking input configuration. Verify sensor polarity and voltage range before applying power.\u003c\/p\u003e\n\u003cp\u003eInspect LED status indicators during commissioning to confirm module communication status, logic operation, and input channel activity.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43762968461402,"sku":"1791D-16B0X","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1791D-16B0X2.jpg?v=1785396289","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1791d-16b0x-compactblock-i-o-expansion-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}