{"product_id":"allen-bradley-1785-l30b-plc-5-30-programmable-controller","title":"Allen-Bradley 1785-L30B PLC-5\/30 Programmable Controller","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1785-L30B\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1785-L30B\u003c\/strong\u003e PLC-5 Processor, operates as a dedicated hardware component for centralized logic control and signal execution within Allen-Bradley PLC-5 systems. It mounts directly into a PLC-5 chassis to execute sequential control, ladder logic processing, and multi-channel I\/O manipulation across plant-wide industrial automation networks.\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\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\u003e1785-L30B\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\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2.73 lbs (1.24 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard PLC-5 Processor Single-Slot Chassis Form Factor\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\u003e2.3 A at 5 VDC (backplane load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Capacity\u003c\/td\u003e\n\u003ctd\u003e32 K Word SRAM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Analog I\/O\u003c\/td\u003e\n\u003ctd\u003e1024 Analog I\/O points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Ports\u003c\/td\u003e\n\u003ctd\u003e2 DH+ \/ Remote I\/O channels, 1 RS-232-C channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Architecture\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley PLC-5 Platform\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity \u0026amp; Network Determinism\u003c\/h3\u003e\n\u003cp\u003eThe 1785-L30B processor manages high-speed backplane bus communication velocity across local and extended 1771 I\/O racks. Built-in Data Highway Plus (DH+) and Remote I\/O (RIO) ports enable deterministic networking and peer-to-peer data transfers between legacy control architectures and supervisory human-machine interfaces (HMI). Internal firmware routines allocate execution priorities to maintain scan-time repeatability while processing 32 K Word SRAM program logic and handling dense 1024 analog I\/O channel updates.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What power supply allocation is required for the 1785-L30B processor backplane load?\u003c\/p\u003e\n\u003cp\u003eA: The processor draws 2.3 A at 5 VDC directly from the 1771 chassis backplane power supply, which must be factored into total rack power budget calculations.\u003c\/p\u003e\n\u003cp\u003eQ: How are communication protocols configured on the two dual-purpose ports of the 1785-L30B?\u003c\/p\u003e\n\u003cp\u003eA: The two DH+\/RIO channels can be individually configured via onboard DIP switches or system software to operate as Data Highway Plus nodes or Remote I\/O scanner\/adapter ports.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Slot Insertion:\u003c\/strong\u003e Turn off rack power prior to installation. Insert the 1785-L30B processor into the leftmost slot (Slot 0) of the 1771 I\/O chassis and engage the retaining latches fully.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommunication Cabling:\u003c\/strong\u003e Connect Belden 9463 twinaxial cable to the 3-pin DH+\/RIO connectors. Ensure proper 150-ohm or 82-ohm termination resistors are installed at both physical ends of the network trunk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial Configuration:\u003c\/strong\u003e Use a shielded 9-pin RS-232 cable for direct programming or serial device connection, maintaining cable lengths under 15 meters (50 feet) to prevent signal noise.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52677957648664,"sku":"1785-L30B","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/1785-L30B2_Cocoai.jpg?v=1789373842","url":"https:\/\/www.innoplcsync.com\/products\/allen-bradley-1785-l30b-plc-5-30-programmable-controller","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}