{"product_id":"1772-lw-allen-bradley-mini-plc-2-17-processor-plc-2-series","title":"1772-LW Allen-Bradley Mini PLC 2\/17 Processor PLC-2 Series","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1772-LW\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1772LW\u003c\/strong\u003e Mini PLC Processor Module, operates as a dedicated hardware component for digital control execution and memory-based program processing within PLC-2\/17 controller platforms.\u003c\/p\u003e\n\u003ch3\u003eModel Identification \u0026amp; Configuration\u003c\/h3\u003e\n\u003cp\u003eThe 1772-LW is a Mini PLC 2\/17 processor module without an integrated power supply. It contains 7.75K words of SRAM memory and supports up to 512 total I\/O points through the PLC-2 system architecture.\u003c\/p\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\u003e1772-LW\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\u003eMini PLC Processor Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003ePLC-2 Series\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\u003e0.9 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e27.9 x 5.1 x 15.2 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Capacity\u003c\/td\u003e\n\u003ctd\u003e7.75K Word SRAM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal I\/O Capacity\u003c\/td\u003e\n\u003ctd\u003e512 points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Port\u003c\/td\u003e\n\u003ctd\u003e15-Pin Interface Port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003eRequires external system power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical Application\u003c\/td\u003e\n\u003ctd\u003e10-32 VDC Digital Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Torque\u003c\/td\u003e\n\u003ctd\u003e7-9 lb*in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\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\u003eProcessor Function\u003c\/td\u003e\n\u003ctd\u003ePLC-2\/17 processing unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eProcessor Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Type\u003c\/td\u003e\n\u003ctd\u003eSRAM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Size\u003c\/td\u003e\n\u003ctd\u003e7.75K Words\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Capability\u003c\/td\u003e\n\u003ctd\u003e512 I\/O points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Frequency\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10-32 VDC digital application range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003e15-Pin Interface Port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Style\u003c\/td\u003e\n\u003ctd\u003ePLC rack installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePLC Control Architecture Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe Allen-Bradley 1772-LW operates within the PLC-2 controller family and performs instruction execution, data handling, and I\/O scan processing. The processor exchanges data through the PLC backplane structure and manages digital control sequences according to stored SRAM program instructions.\u003c\/p\u003e\n\u003cp\u003eThe PLC-2 architecture uses fixed processor and I\/O rack communication methods. The 1772-LW does not provide integrated power conversion and requires installation with a compatible PLC system power supply.\u003c\/p\u003e\n\u003cp\u003eFor Allen-Bradley legacy control systems, processor replacement requires verification of rack configuration, I\/O addressing, and firmware compatibility. The module design follows earlier PLC backplane communication methods rather than modern EtherNet\/IP deterministic networks.\u003c\/p\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Allen-Bradley 1772-LW Mini PLC 2\/17 Processor Module\u003c\/li\u003e\n\u003cli\u003e1 x Compatible PLC-2 Series processor housing assembly\u003c\/li\u003e\n\u003cli\u003e1 x Installed SRAM memory module\u003c\/li\u003e\n\u003cli\u003e1 x Product identification label\u003c\/li\u003e\n\u003cli\u003e1 x Technical inspection report (if supplied)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eRack Installation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstall the module in the designated PLC-2 processor rack position.\u003c\/li\u003e\n\u003cli\u003eConfirm mechanical alignment before applying insertion force.\u003c\/li\u003e\n\u003cli\u003eVerify processor seating within the backplane connector.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eElectrical Connection\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm system power supply compatibility before energizing.\u003c\/li\u003e\n\u003cli\u003eCheck backplane connections for contamination or oxidation.\u003c\/li\u003e\n\u003cli\u003eTighten terminal screws according to the specified 7-9 lb*in torque range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eConfiguration Verification\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm I\/O addressing matches the existing PLC-2 program configuration.\u003c\/li\u003e\n\u003cli\u003eVerify memory content before returning the controller to operation.\u003c\/li\u003e\n\u003cli\u003eAvoid removing or installing modules while system power is applied unless the rack design specifically permits it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat controller family does the 1772-LW belong to?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1772-LW is a Mini PLC 2\/17 processor module designed for Allen-Bradley PLC-2 series controller systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 1772-LW include a power supply?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The module is supplied without an integrated power supply and requires a compatible PLC system power source.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat memory type is used in the 1772-LW?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe processor uses SRAM memory with a capacity of 7.75K words for storing PLC program data.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHow many I\/O points can the 1772-LW support?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module supports a total I\/O capacity of up to 512 points within the PLC-2\/17 system configuration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan the 1772-LW be installed in modern ControlLogix racks?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The 1772-LW uses PLC-2 series hardware architecture and is not compatible with ControlLogix platforms.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat type of applications does the 1772-LW control?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe processor is designed for digital control applications using 10-32 VDC field devices.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 1772-LW support Ethernet communication?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The module uses legacy PLC-2 communication structures and does not include Ethernet communication interfaces.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat should be checked before replacing this processor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eVerify rack compatibility, I\/O addressing, memory configuration, and existing PLC-2 program requirements before installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066445090989,"sku":"1772-LW","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1772-LW0.jpg?v=1785856162","url":"https:\/\/www.maxwellplc.com\/ga\/products\/1772-lw-allen-bradley-mini-plc-2-17-processor-plc-2-series","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}