{"product_id":"1764-24bwa-allen-bradley-micrologix-1500-controller-base-unit","title":"1764-24BWA Allen-Bradley MicroLogix 1500 Controller Base Unit","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1764-24BWA\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e176424BWA\u003c\/strong\u003e Base Unit, operates as a dedicated hardware component for discrete signal processing and field execution within MicroLogix 1500 control architectures.\u003c\/p\u003e\n\u003ch3\u003eFunctional Configuration Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1764-24BWA\u003c\/strong\u003e: Base processing unit providing 120 VAC line power input, 12 sink\/source 24 VDC digital inputs, and 12 electromechanical relay outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e176424BWA\u003c\/strong\u003e: Factory spare part catalog identifier matching the 24-point AC-powered base hardware interface.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Performance Parameters\u003c\/h3\u003e\n\u003cfigure\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\u003e1764-24BWA\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\u003e0.95 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e16.9 x 13.2 x 8.9 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e30 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLine Power Voltage\u003c\/td\u003e\n\u003ctd\u003e85 to 265 VAC (50\/60 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e12 Points (24 VDC Sink\/Source)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e12 Points (Electromechanical Relay)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e24-125 VDC, 120-240 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput High-Speed Frequency\u003c\/td\u003e\n\u003ctd\u003e0 to 20 kHz (Channels 0-3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBus Communication \u0026amp; High-Speed Processing\u003c\/h3\u003e\n\u003cp\u003eThe base unit routes input signals to the processor module via an integrated high-speed backplane interface. It features firmware flash compatibility across MicroLogix 1500 logic processors, ensuring synchronized I\/O scanning and deterministic network response over EtherNet\/IP or DH-485 interfaces. The front high-speed input channels process pulses up to 20 kHz, enabling precise pulse-counting without compromising overall I\/O density scaling.\u003c\/p\u003e\n\u003ch3\u003eStandard Delivery Hardware\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 1764-24BWA MicroLogix 1500 Base Unit\u003c\/li\u003e\n\u003cli\u003e1 x Protective Terminal Cover Shield\u003c\/li\u003e\n\u003cli\u003e1 x DIN-Rail Mounting Latch Assembly\u003c\/li\u003e\n\u003cli\u003e1 x Hardware Installation Guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMounting \u0026amp; Wiring Specifications\u003c\/h3\u003e\n\u003ch4\u003eEnclosure and Panel Mounting\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMount the base unit vertically or horizontally on a standard 35 mm DIN rail or secure it to a grounded metal enclosure panel using M4 screws.\u003c\/li\u003e\n\u003cli\u003eMaintain a minimum surrounding clearance of 50 mm (2 in) to allow adequate thermal convection and wiring access.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePower and Field Terminal Connections\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eConnect AC line power (85-265 VAC) to the labeled power terminal block using copper conductors rated for at least 75 deg C.\u003c\/li\u003e\n\u003cli\u003eIsolate high-voltage AC output wiring from low-voltage 24 VDC sensor inputs in separate wire runs to prevent signal noise coupling.\u003c\/li\u003e\n\u003cli\u003eTighten terminal block screws to a maximum torque of 0.9 Nm (8 lb-in).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Operational FAQs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat input circuit configurations does the 24 VDC input stage support?\u003c\/p\u003e\n\u003cp\u003eThe 12 digital input channels support both sinking and sourcing wiring topologies depending on the common terminal connection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the maximum switching frequency for the high-speed input channels?\u003c\/p\u003e\n\u003cp\u003eInputs 0 through 3 operate as high-speed counters capable of processing input pulse frequencies up to 20 kHz.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan the base unit function without a processor module installed?\u003c\/p\u003e\n\u003cp\u003eNo. The 1764-24BWA is a base unit requiring a 1764 processor module (such as 1764-LSP or 1764-LRP) to execute logic control.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat voltage ranges can the relay contacts switch safely?\u003c\/p\u003e\n\u003cp\u003eThe output relay contacts accept load voltages ranging from 24 to 125 VDC and 120 to 240 VAC under nominal current limits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the base unit provide auxiliary 24 VDC power for field sensors?\u003c\/p\u003e\n\u003cp\u003eYes. An integrated auxiliary power supply provides 24 VDC output current to power connected field input devices directly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs hot-swapping supported for the attached processor or expansion modules?\u003c\/p\u003e\n\u003cp\u003eNo. Power to the 1764-24BWA must be disconnected prior to inserting or removing the processor module or expansion I\/O cables.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow are the 12 relay outputs isolated across the terminal block?\u003c\/p\u003e\n\u003cp\u003eThe relay output contacts are arranged in multiple isolated groups, allowing separate voltage source connections per common group.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat wire range is compatible with the screw terminal blocks?\u003c\/p\u003e\n\u003cp\u003eThe integrated screw terminals accept solid or stranded copper wire sizes from 0.2 to 2.5 sq mm (24 to 14 AWG).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066425364653,"sku":"1764-24BWA","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/allen-bradley_1764-24bwa_1.jpg?v=1786977254","url":"https:\/\/www.maxwellplc.com\/products\/1764-24bwa-allen-bradley-micrologix-1500-controller-base-unit","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}