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Allen-Bradley 1756-A4
by Allen-Bradley
Read verified buyer reviews ↓OverviewThe Allen-Bradley 1756-A4 ControlLogix chassis serves as a fundamental element for constructing adaptable and powerful industrial automation setups. Skillfully designed to deliver the necessary physical structure and backplane connectivity, this 4-slot chassis guarantees effortless integration and optimal performance for your ControlLogix modules. Crafted specifically for horizontal back-panel mounting, the 1756-A4 presents a compact yet potent option for numerous industrial uses, accommodating various ControlLogix power supplies to suit diverse operational demands. This chassis is vital for efficient power distribution and dependable communication across as many as four ControlLogix I/O, communication, or specialized modules. Its built-in ControlLogix backplane ensures superior performance and stability. For unoccupied slots, the system mandates the use of 1756-N2 slot filler units, promoting both safety and adequate airflow, thereby contributing to the durability and dependability of your entire ControlLogix configuration.Key Features Optimized 4-Slot ControlLogix Configuration: Supports up to four modules, ideal for maximizing cabinet space. Horizontal Back-Panel Mounting: Provides secure and stable installation for challenging industrial settings. Broad Power Supply Compatibility: Works with a range of ControlLogix power supplies, including 1756-PA72, 1756-PB72, 1756-PA75, 1756-PB75, 1756-PC75, and 1756-PH75. Integrated High-Speed Backplane: Delivers reliable, high-bandwidth communication and power to all connected modules. Mandatory Slot Filler Module Support (1756-N2): Ensures correct airflow, EMI protection, and safety for unpopulated slots. Resilient Industrial-Grade Construction: Built to endure demanding industrial environments, guaranteeing long-term functionality and dependability. ControlLogix Ecosystem Optimization: Guarantees smooth compatibility and integration with other Allen-Bradley ControlLogix components. Technical Specifications Model: 1756-A4 Series: ControlLogix Number of Slots: 4 Backplane Current (Chassis/Slot Max): @ 1.2V DC: 1.5 A / 1.5 A @ 3.3V DC: 4 A / 4 A @ 5.1V DC: 15 A / 6 A @ 24V DC: 2.8 A / 2.8 A Power Dissipation: 6.1 BTU/hr Power Consumption: 1.8 W Dimensions (WxHxD): 263 x 169 x 145 mm (10.35 x 6.65 x 5.71 in.) Minimum Cabinet Size (WxHxD): 507 x 507 x 203 mm (20 x 20 x 8 in.) Weight: 0.75 kg (1.7 lb) Applications Advanced Industrial Automation Systems: Serves as the backbone for sophisticated ControlLogix controllers and various I/O modules. High-Precision Factory Process Control: Offers a reliable and stable platform for critical automation solutions in manufacturing environments. Compact Control Panel Installations: Perfectly suited for smaller ControlLogix system setups where space is a critical consideration. High-Performance Machine Control: Enables accurate and efficient process automation, enhancing overall machine productivity. Data Acquisition and Monitoring Systems: Provides robust support for modules involved in collecting and analyzing vital industrial data. Why Choose This Model? Exceptional Reliability: Developed by Allen-Bradley, a leader in industrial automation, ensuring consistent and trustworthy operation. Space-Efficient Design: Its compact 4-slot layout is perfect for installations where cabinet space is limited, without sacrificing capability. Effortless Integration: Engineered to integrate seamlessly within the ControlLogix ecosystem, simplifying system configuration and expansion. Enhanced System Durability: The robust backplane and durable construction contribute to the overall resilience and longevity of your automation system. Flexible and Expandable: Despite its compact size, it offers the adaptability to incorporate essential modules, making it a scalable solution for evolving requirements. Performance Optimized: Delivers efficient power distribution and high-speed data communication, crucial for maintaining peak operational efficiency. Order NowElevate your industrial automation system with the Allen-Bradley 1756-A4 ControlLogix chassis. Its robust design, seamless integration, and reliable performance make it an indispensable component for any advanced control application. Contact us today to secure your unit and experience enhanced operational efficiency.FAQWhat is the primary function of the Allen-Bradley 1756-A4 chassis?The 1756-A4 functions as the foundational framework for ControlLogix industrial automation systems, providing physical support and backplane connectivity for up to four modules, ensuring efficient power and data communication.How many modules can the 1756-A4 chassis accommodate?This chassis is designed to house up to four ControlLogix I/O, communication, or specialty modules.Is special mounting required for the 1756-A4?Yes, the 1756-A4 is specifically engineered for horizontal-only, back-panel mounting to ensure secure and stable installation.What is the purpose of the 1756-N2 slot filler modules?Mandatory 1756-N2 slot filler modules are used for any unoccupied slots to ensure proper airflow, EMI protection, and overall system safety and longevity.Can different power supplies be used with this chassis?Yes, the 1756-A4 supports a variety of ControlLogix power supplies, offering flexibility to meet diverse operational needs.
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Allen-Bradley 1756-A4
Overview
This is a genuine Allen-Bradley component from the ControlLogix family. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.
Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.
Key Features
- Genuine Allen-Bradley catalog part
- Tested before shipment
- Backed by PalmPartsSolution warranty
- Cross-reference and revision assistance available
- Compatible with the broader Allen-Bradley automation ecosystem
- Engineered to integrate inside ControlLogix installations
Compatibility
When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Allen-Bradley equipment. Where applicable, confirm:
- Input/output voltage and current rating
- Communication protocol and network role
- Mounting form factor and footprint
- Operating temperature, humidity, and IP rating
- Required certifications (UL, CE, ATEX, marine, etc.)
Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.
Replacement Information
Three ways to source this part through PalmPartsSolution:
- Exact replacement — same Allen-Bradley catalog number, new or refurbished, tested and warrantied
- Form-fit-function equivalent — alternate revision or build that drops in without code changes
- Engineered migration — current-generation Allen-Bradley platform with documented conversion notes for the ControlLogix family
Contact our engineering team if you need help choosing between these tracks.
Technical Specifications
- Model: 1756-A4
- Series: ControlLogix
- Number of Slots: 4
-
Backplane Current (Chassis/Slot Max):
- @ 1.2V DC: 1.5 A / 1.5 A
- @ 3.3V DC: 4 A / 4 A
- @ 5.1V DC: 15 A / 6 A
- @ 24V DC: 2.8 A / 2.8 A
- Power Dissipation: 6.1 BTU/hr
- Power Consumption: 1.8 W
- Dimensions (WxHxD): 263 x 169 x 145 mm (10.35 x 6.65 x 5.71 in.)
- Minimum Cabinet Size (WxHxD): 507 x 507 x 203 mm (20 x 20 x 8 in.)
- Weight: 0.75 kg (1.7 lb)
Applications
- Advanced Industrial Automation Systems: Serves as the backbone for sophisticated ControlLogix controllers and various I/O modules.
- High-Precision Factory Process Control: Offers a reliable and stable platform for critical automation solutions in manufacturing environments.
- Compact Control Panel Installations: Perfectly suited for smaller ControlLogix system setups where space is a critical consideration.
- High-Performance Machine Control: Enables accurate and efficient process automation, enhancing overall machine productivity.
- Data Acquisition and Monitoring Systems: Provides robust support for modules involved in collecting and analyzing vital industrial data.
Why Choose the 1756-A4?
- Exceptional Reliability: Developed by Allen-Bradley, a leader in industrial automation, ensuring consistent and trustworthy operation.
- Space-Efficient Design: Its compact 4-slot layout is perfect for installations where cabinet space is limited, without sacrificing capability.
- Effortless Integration: Engineered to integrate seamlessly within the ControlLogix ecosystem, simplifying system configuration and expansion.
- Enhanced System Durability: The robust backplane and durable construction contribute to the overall resilience and longevity of your automation system.
- Flexible and Expandable: Despite its compact size, it offers the adaptability to incorporate essential modules, making it a scalable solution for evolving requirements.
- Performance Optimized: Delivers efficient power distribution and high-speed data communication, crucial for maintaining peak operational efficiency.
Availability & Shipping
- ▸In stock: 1756-A4 ready for immediate dispatch from our Florida warehouse.
- ▸Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
- ▸Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
- ▸Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
- ▸Buy with confidence: Every 1756-A4 ships with a 1-Year PALM Parts warranty and a 30-day return window.
Frequently Asked Questions — Allen-Bradley
Machine down? We ship parts the same day.
New, surplus, and refurbished Allen-Bradley inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.
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Independent Supplier Notice
PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.
Product Condition & Firmware
All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.