{"product_id":"allen-bradley-1771-a1b-b-plc-5-4-slot-i-o-chassis","title":"Allen-Bradley 1771-A1B\/B PLC-5 4-Slot I\/O Chassis","description":"\u003ch2\u003eAllen-Bradley 1771-A1B\/B PLC-5 4-Slot I\/O Chassis\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1771-A1B\/B\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1771-A1B\/B\u003c\/strong\u003e I\/O Chassis, operates as a dedicated hardware component for PLC-5 module mounting, backplane signal distribution, and power routing within Bulletin 1771 I\/O systems. The chassis provides four I\/O slots with a parallel backplane interface for digital, analog, and specialty modules.\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\u003e1771-A1B\/B\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\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\u003e7.75 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e355 x 165 x 140 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eDependent on installed modules; supports up to 16 A backplane current at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003ePLC-5 \/ Bulletin 1771\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eI\/O Chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Slots\u003c\/td\u003e\n\u003ctd\u003e4 I\/O Slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Type\u003c\/td\u003e\n\u003ctd\u003e1771 Parallel Backplane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply Requirement\u003c\/td\u003e\n\u003ctd\u003eExternal 1771-P series power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003ePanel Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Style\u003c\/td\u003e\n\u003ctd\u003eOpen Type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Options\u003c\/td\u003e\n\u003ctd\u003eLocal I\/O, Remote I\/O via 1771-ASB, ControlNet via 1771-ACN15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Shock\u003c\/td\u003e\n\u003ctd\u003e15 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNon-Operating Shock\u003c\/td\u003e\n\u003ctd\u003e30 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration Rating\u003c\/td\u003e\n\u003ctd\u003e2 g at 10-500 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePLC-5 Backplane Architecture and I\/O Integration\u003c\/h3\u003e\n\u003cp\u003eThe 1771-A1B\/B chassis provides the mechanical structure and electrical backplane connection required for PLC-5 I\/O modules. The parallel backplane supports module-to-processor data exchange and distributes power connections from the external 1771-P series power supply.\u003c\/p\u003e\n\u003cp\u003eThe chassis supports I\/O density scaling through installation of compatible 1771 digital, analog, and specialty modules. The PLC-5 architecture uses deterministic backplane bus communication behavior for local and remote I\/O configurations, including installations using 1771-ASB adapters.\u003c\/p\u003e\n\u003cp\u003eThe open chassis construction requires proper panel installation practices and protection from environmental contaminants according to the application enclosure requirements.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How many modules can be installed in the 1771-A1B\/B chassis?\u003cbr\u003eA: The 1771-A1B\/B chassis provides four I\/O module slots for compatible Bulletin 1771 modules.\u003c\/p\u003e\n\u003cp\u003eQ: Does the 1771-A1B\/B contain an integrated power supply?\u003cbr\u003eA: No. The chassis requires an external 1771-P series power supply for backplane power distribution.\u003c\/p\u003e\n\u003cp\u003eQ: What type of communication interface does the chassis provide?\u003cbr\u003eA: The chassis uses the PLC-5 1771 parallel backplane interface and supports local I\/O or remote configurations through compatible adapters.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1771-A1B\/B chassis on a rigid panel surface using appropriate mechanical mounting hardware. Verify chassis alignment before inserting I\/O modules to prevent connector damage.\u003c\/p\u003e\n\u003cp\u003eConnect the external 1771-P series power supply according to the applicable PLC-5 system wiring requirements. Confirm backplane power availability before module installation.\u003c\/p\u003e\n\u003cp\u003eRoute I\/O wiring separately from high-voltage and high-current conductors. Use shielded cables for noise-sensitive analog signals and terminate shields according to site grounding standards.\u003c\/p\u003e\n\u003cp\u003eMaintain adequate clearance around the open-style chassis to allow inspection, module replacement, and airflow within the control enclosure.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43668109262938,"sku":"1771-A1B\/B","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1771-A1B_2.jpg?v=1741000615","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1771-a1b-b-plc-5-4-slot-i-o-chassis","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}