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Allen-Bradley 1771-A4B
by Allen-Bradley
Read verified buyer reviews ↓OverviewElevate the capabilities of your industrial automation with the Allen-Bradley 1771-A4B PLC-5 I/O Chassis Assembly. This essential component of the renowned Allen-Bradley PLC-5 system provides exceptional reliability and adaptability for demanding industrial settings. Designed for secure back-panel installation, the 1771-A4B creates a solid platform for integrating a wide selection of input and output modules. This modularity allows you to customize your PLC-5 system precisely to your application's needs, optimizing functionality and overall operational efficiency. Its industrial-grade construction guarantees effortless integration with other Allen-Bradley components, fostering a cohesive and efficient automation infrastructure. Whether you are expanding an existing setup or implementing a new one, the 1771-A4B offers the stability and flexibility required for critical operations.Key Features 16-Slot Modular Design: Accommodates up to 16 individual I/O modules, offering extensive adaptability for system expansion and customization. Seamless PLC-5 Integration: Engineered for direct compatibility with Allen-Bradley PLC-5 control systems, ensuring simple setup and operation within current architectures. Robust Industrial Construction: Built with premium, industrial-grade metal housing to endure harsh operating environments, ensuring long-term resilience and dependability. Back-Panel Mounting: Designed for secure and convenient installation within control cabinets, maximizing space utilization and ensuring a stable setup. Enhanced System Scalability: Facilitates straightforward addition and removal of I/O modules, allowing your system to evolve with changing operational requirements. Reliable Performance: Delivers consistent and dependable operations, vital for maintaining uptime and efficiency in crucial industrial applications. Technical Specifications Model: 1771-A4B Chassis Type: 16 Slot I/O Chassis Assembly Mounting: Back-panel mount Compatibility: Specifically designed for use with Allen-Bradley PLC-5 systems Slots: 16 dedicated slots for various I/O modules Power Supply Requirements: Compatible with Allen-Bradley PLC-5 power supplies (sold separately) Construction: Industrial-grade metal housing for superior resilience Operating Environment: Suitable for a broad spectrum of industrial automation applications Approximate Weight: 10 lbs (4.5 kg) Applications Industrial Automation & Control: Essential for managing and monitoring diverse industrial processes across manufacturing, material handling, packaging, and assembly lines. Complex Process Control Systems: Critical in sectors requiring precise control, such as chemical processing, oil and gas, water and wastewater treatment, and pharmaceutical manufacturing. Factory Automation Solutions: Provides a scalable and modular I/O framework for modern factories that rely on robust PLC-based systems. Advanced Machine Control: Perfect for overseeing the intricate operations of specialized machinery and equipment in various industrial segments. Building Management Systems: Can be incorporated into large-scale building automation for intelligent control of HVAC, lighting, security, and other vital infrastructure. Energy Management: Utilized in systems engineered to track and optimize energy consumption within industrial facilities. Why Choose This Model?Unmatched Reliability: Benefit from Allen-Bradley's reputation for producing highly dependable industrial control components that ensure continuous operation.Exceptional Flexibility: The 16-slot design allows for extensive customization, enabling you to build a system perfectly tailored to your current and future needs.Guaranteed Compatibility: Enjoy confidence knowing the 1771-A4B is engineered for seamless integration with your existing Allen-Bradley PLC-5 infrastructure.Durability for Demanding Conditions: Its heavy-duty construction means it can endure the harshest industrial environments.Order NowUpgrade your industrial control system today with the Allen-Bradley 1771-A4B PLC-5 I/O Chassis Assembly. Contact Palm Parts Solution to secure this vital component for enhanced automation reliability and performance.FAQWhat is the primary function of the Allen-Bradley 1771-A4B?The 1771-A4B serves as a modular I/O chassis, providing 16 slots for various input and output modules within an Allen-Bradley PLC-5 control system. It forms the backbone for connecting field devices to the PLC.Is this chassis compatible with all Allen-Bradley PLC systems?No, the 1771-A4B is specifically designed for seamless integration and compatibility with the Allen-Bradley PLC-5 family of programmable logic controllers.Can I expand the number of I/O modules beyond 16 with this chassis?This particular chassis offers 16 dedicated slots. To expand beyond 16 I/O modules, additional I/O chassis would be required in your PLC-5 system architecture.What type of mounting does the 1771-A4B use?The 1771-A4B is designed for back-panel mounting, ensuring secure and space-efficient installation within industrial control cabinets.Does the 1771-A4B include a power supply?No, the power supply for the PLC-5 system is sold separately. The 1771-A4B chassis is compatible with Allen-Bradley PLC-5 power supplies.
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Allen-Bradley 1771-A4B
Overview
This is a genuine Allen-Bradley component from the PLC-5 Platform (Legacy) 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 PLC-5 Platform (Legacy) 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 PLC-5 Platform (Legacy) family
Contact our engineering team if you need help choosing between these tracks.
Technical Specifications
- Model: 1771-A4B
- Chassis Type: 16 Slot I/O Chassis Assembly
- Mounting: Back-panel mount
- Compatibility: Specifically designed for use with Allen-Bradley PLC-5 systems
- Slots: 16 dedicated slots for various I/O modules
- Power Supply Requirements: Compatible with Allen-Bradley PLC-5 power supplies (sold separately)
- Construction: Industrial-grade metal housing for superior resilience
- Operating Environment: Suitable for a broad spectrum of industrial automation applications
- Approximate Weight: 10 lbs (4.5 kg)
Applications
- Industrial Automation & Control: Essential for managing and monitoring diverse industrial processes across manufacturing, material handling, packaging, and assembly lines.
- Complex Process Control Systems: Critical in sectors requiring precise control, such as chemical processing, oil and gas, water and wastewater treatment, and pharmaceutical manufacturing.
- Factory Automation Solutions: Provides a scalable and modular I/O framework for modern factories that rely on robust PLC-based systems.
- Advanced Machine Control: Perfect for overseeing the intricate operations of specialized machinery and equipment in various industrial segments.
- Building Management Systems: Can be incorporated into large-scale building automation for intelligent control of HVAC, lighting, security, and other vital infrastructure.
- Energy Management: Utilized in systems engineered to track and optimize energy consumption within industrial facilities.
Why Choose the 1771-A4B?
Unmatched Reliability: Benefit from Allen-Bradley's reputation for producing highly dependable industrial control components that ensure continuous operation.
Exceptional Flexibility: The 16-slot design allows for extensive customization, enabling you to build a system perfectly tailored to your current and future needs.
Guaranteed Compatibility: Enjoy confidence knowing the 1771-A4B is engineered for seamless integration with your existing Allen-Bradley PLC-5 infrastructure.
Durability for Demanding Conditions: Its heavy-duty construction means it can endure the harshest industrial environments.
Availability & Shipping
- ▸In stock: 1771-A4B 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 1771-A4B 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.