{"product_id":"1756-a4-industrial-automation-module-reliable-by-allen-bradley","title":"1756-A4 Industrial Automation Module - Reliable by Allen-Bradley","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eWhen your control system demands a robust and flexible housing for ControlLogix modules, the Allen-Bradley 1756-A4 4-Slot ControlLogix Chassis delivers the structural foundation you need. This chassis provides the physical connections between modules and the ControlLogix backplane, ensuring reliable power distribution and high-speed data transfer across your automation network.\u003c\/p\u003e\u003cp\u003ePart of the ControlLogix series, the Allen-Bradley 1756-A4 is designed for horizontal-only, back-panel mounting. It accepts a wide range of ControlLogix processors, I\/O modules, communication adapters, and specialty modules, making it a versatile choice for both central and distributed control architectures.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1756-A4 offers the following key specifications:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Slots:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Current (1.2V DC):\u003c\/strong\u003e 1.5 A (chassis\/slot max)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Current (3.3V DC):\u003c\/strong\u003e 4 A (chassis\/slot max)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Current (5.1V DC):\u003c\/strong\u003e 15 A (chassis), 6 A (slot max)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Current (24V DC):\u003c\/strong\u003e 2.8 A (chassis\/slot max)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e 6.1 BTU\/hr (max 4 W)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Consumption:\u003c\/strong\u003e 1.8 W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (WxHxD):\u003c\/strong\u003e 263 x 169 x 145 mm (10.35 x 6.65 x 5.71 in.)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCabinet Size (min):\u003c\/strong\u003e 507 x 507 x 203 mm (20 x 20 x 8 in.)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.75 kg (1.7 lb)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Horizontal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure:\u003c\/strong\u003e Open\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1756-A4 chassis provides a high-speed communication path between modules and distributes power efficiently. Its backplane current ratings ensure stable operation even with high-power modules installed.\u003c\/p\u003e\u003cp\u003eEquipped with Removal and Insertion Under Power (RIUP) capability, the 1756-A4 allows you to replace modules without shutting down the system, minimizing downtime. Electronic keying prevents incorrect module installation, reducing costly errors.\u003c\/p\u003e\u003cp\u003eThe chassis supports distributed applications, enabling I\/O modules to be located remotely from the processor. This eliminates long signal cable runs and simplifies system layout.\u003c\/p\u003e\u003ch2\u003eIndustry Applications\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1756-A4 is ideal for a wide range of industries, including:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing:\u003c\/strong\u003e Automate assembly lines, material handling, and packaging systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess Control:\u003c\/strong\u003e Manage chemical, oil \u0026amp; gas, and pharmaceutical processes with reliable I\/O handling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInfrastructure:\u003c\/strong\u003e Control water treatment, power generation, and building automation systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIn a typical manufacturing line, the 1756-A4 houses a ControlLogix processor and I\/O modules, coordinating machine sequences and ensuring precise timing. In distributed applications, it can be placed near remote sensors and actuators, reducing wiring costs and improving signal integrity.\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Setup Guidance\u003c\/h2\u003e\u003cp\u003eMount the Allen-Bradley 1756-A4 horizontally on a back panel using the provided mounting holes. Ensure the cabinet meets the minimum size requirement of 507 x 507 x 203 mm to allow proper airflow and access.\u003c\/p\u003e\u003cp\u003eInstall a compatible power supply from the supported list: 1756-PA72, 1756-PB72, 1756-PA75, 1756-PB75, 1756-PC75, or 1756-PH75. The power supply mounts externally to the chassis via the provided interface.\u003c\/p\u003e\u003cp\u003eFill any empty slots with slot filler modules (1756-N2) to maintain proper cooling and protect the backplane. Insert modules firmly until they latch, and verify proper seating before applying power.\u003c\/p\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eRegularly inspect the chassis for dust accumulation and ensure the backplane contacts are clean. Check that all modules are securely seated and that the power supply connections remain tight.\u003c\/p\u003e\u003cp\u003eThe open enclosure design allows for natural cooling, but ensure the cabinet has adequate ventilation. Avoid exposing the chassis to excessive vibration or corrosive environments.\u003c\/p\u003e\u003cp\u003eWith proper maintenance, the 1756-A4 delivers long service life, reducing total cost of ownership and preventing unplanned downtime.\u003c\/p\u003e\u003ch2\u003eCompatibility \u0026amp; Integration\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1756-A4 is fully compatible with the ControlLogix platform, supporting all ControlLogix processors, I\/O modules, communication adapters, and specialty modules. It also accepts Encompass partner and third-party modules that meet ControlLogix specifications.\u003c\/p\u003e\u003cp\u003eEach chassis requires its own system power supply, and the 1756-A4 works seamlessly with the listed power supplies. For distributed I\/O setups, install a communication adapter in the chassis to link remote I\/O to the main processor.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing the Allen-Bradley 1756-A4, verify your slot count requirements and power budget. Check that your chosen power supply is on the compatible list and that your cabinet space meets the minimum dimensions.\u003c\/p\u003e\u003cp\u003eConsider future expansion needs—if you anticipate adding more modules, you might opt for a larger chassis like the 1756-A7 or 1756-A10. However, the 1756-A4 remains a cost-effective choice for smaller control panels.\u003c\/p\u003e\u003cp\u003eFor genuine, reliable parts, PLC Source PRO offers the Allen-Bradley 1756-A4 with fast shipping and competitive pricing. Ensure you purchase from a trusted supplier to guarantee authentic components and avoid counterfeit risks.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44434857820259,"sku":"1756-A4","price":292.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1756-2WS_8a0d022b-39ca-46ba-bfe1-9d446e025e67.jpg?v=1785776031","url":"https:\/\/www.plcsourcepro.com\/ar\/products\/1756-a4-industrial-automation-module-reliable-by-allen-bradley","provider":"PLC Source PRO","version":"1.0","type":"link"}