1771-A3B | Allen-Bradley PLC-5 12-Slot I/O Chassis Assembly 19-Inch Rack Mount

Description

The Allen-Bradley 1771-A3B is a 12-slot I/O chassis designed for PLC-5 systems, providing a structured mounting and backplane interface for 1771-series I/O modules. Its 19-inch rack-mountable form ensures compatibility with standard industrial enclosures while supporting reliable power distribution and signal communication across all installed modules.

Technical Specifications 

Information About 1771-A3B

The 1771-A3B chassis is part of Allen-Bradley’s PLC-5 platform, providing a durable and standardized mounting solution for 1771 I/O modules. With 12 available slots, it enables extensive modular expansion for large-scale control systems. The chassis incorporates an integrated backplane that distributes power and communication signals between the PLC processor and installed I/O modules. Designed for 19-inch rack or back-panel mounting, it fits seamlessly into industrial enclosures and process control cabinets. Its robust construction supports dependable operation in plant environments where reliable I/O communication and stable backplane performance are essential.

Key Features:

• 12-Slot Expansion Capacity: Supports a range of 1771 I/O modules, enabling flexible configuration of digital, analog, and specialty I/O for PLC-5 systems.
• Integrated Backplane Communication: Provides stable data and power distribution across all installed modules, ensuring reliable system performance and scalability.
• 19-Inch Rack Mount Compatibility: Designed for standard industrial rack systems, simplifying integration into large control cabinets and process enclosures.
• High Current Support: Supplies up to 24 A at 5.25 VDC, accommodating fully populated chassis configurations without performance degradation.
• Industrial-Grade Construction: Built for durability in demanding automation environments, supporting long-term reliability in continuous plant operations.
• Back Panel Mount Option: Offers installation flexibility for machine builders and retrofit applications requiring chassis mounting directly onto cabinet back panels.
• PLC-5 System Integration: Ensures full compatibility with legacy 1771 I/O modules and PLC-5 processors still widely used in manufacturing and process industries.
• Modular I/O Architecture: Allows easy expansion and reconfiguration of I/O without significant cabinet redesign, supporting system upgrades and maintenance.

The 1771-A3B delivers the reliability and precision required for large-scale PLC-5 I/O systems, offering stable operation and versatile mounting options for industrial applications.

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