{"product_id":"1764-28bxb-allen-bradley-micrologix-1500-base-unit","title":"1764-28BXB Allen-Bradley MicroLogix 1500 Base Unit","description":"\u003ch2\u003eAllen-Bradley 1764-28BXB MicroLogix 1500 Base Unit\u003c\/h2\u003e\n\u003cp\u003eConfigured for discrete I\/O execution in MicroLogix 1500 controller systems, the \u003cstrong\u003eAllen-Bradley 1764-28BXB\u003c\/strong\u003e (\u003cstrong\u003e1764\u003c\/strong\u003e MicroLogix 1500 Base Unit) provides direct physical\/electrical interface handling for 24 VDC inputs, relay outputs, and high-speed transistor I\/O 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\u003e1764-28BXB\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\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.44 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e30 W maximum usage rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003ePLC Base Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Family\u003c\/td\u003e\n\u003ctd\u003eMicroLogix 1500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLine Power\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Inputs\u003c\/td\u003e\n\u003ctd\u003e8 x 24 VDC inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFast Inputs\u003c\/td\u003e\n\u003ctd\u003e8 x 24 VDC fast inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh-Speed Inputs\u003c\/td\u003e\n\u003ctd\u003e8 channels at 20 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay Outputs\u003c\/td\u003e\n\u003ctd\u003e6 relay outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Outputs\u003c\/td\u003e\n\u003ctd\u003e4 x 24 VDC FET outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFast Outputs\u003c\/td\u003e\n\u003ctd\u003e2 x 24 VDC FET outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh-Speed Outputs\u003c\/td\u003e\n\u003ctd\u003e2 channels at 20 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Screw Torque\u003c\/td\u003e\n\u003ctd\u003e1.13 Nm rated, 1.3 Nm maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eEtherNet\/IP and I\/O Interface Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 1764-28BXB base unit is configured for MicroLogix 1500 PLC architectures requiring mixed discrete signal processing. The unit provides eight standard 24 VDC input points and eight fast input points for pulse or rapid state detection. High-speed input and output channels support operation at 20 kHz for motion-related or counting applications.\u003c\/p\u003e\n\u003cp\u003eThe Allen-Bradley MicroLogix 1500 platform supports deterministic controller-to-I\/O execution through the internal system bus. I\/O density scaling is defined by the base unit configuration, with relay and transistor output combinations available for different machine control requirements.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1764-28BXB provide both relay and transistor outputs?\u003cbr\u003eA: Yes. The base unit includes six relay outputs, four standard 24 VDC FET outputs, and two fast 24 VDC FET outputs.\u003c\/p\u003e\n\u003cp\u003eQ: What is the input signal type supported by the high-speed inputs?\u003cbr\u003eA: The high-speed inputs are 24 VDC channels designed for high-frequency input processing up to 20 kHz.\u003c\/p\u003e\n\u003cp\u003eQ: Is the 1764-28BXB a standalone PLC controller?\u003cbr\u003eA: No. The 1764-28BXB is a MicroLogix 1500 base unit designed as the I\/O and power interface section of a PLC system.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1764-28BXB on a suitable control panel surface with adequate clearance for terminal access and wiring maintenance. Verify the 24 VDC power source polarity before connection.\u003c\/p\u003e\n\u003cp\u003eRoute DC power wiring separately from high-voltage AC conductors and high-noise switching circuits. Use shielded cable practices for signal wiring where required by the application environment, with cable shields bonded according to site grounding standards.\u003c\/p\u003e\n\u003cp\u003eTighten terminal screws within the specified torque range to maintain electrical contact integrity. Confirm input and output channel assignments before system commissioning to prevent incorrect field device connection.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43655939522650,"sku":"1764-28BXB","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1764-28BXB2.jpg?v=1784011455","url":"https:\/\/www.plcmasters.com\/products\/1764-28bxb-allen-bradley-micrologix-1500-base-unit","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}