1771-A3B PLC Chassis - Allen-Bradley | 24A Power

Allen-Bradley 1771-A3B: High-Capacity 12-Slot I/O Chassis

The Allen-Bradley 1771-A3B I/O chassis delivers exceptional expansion for demanding control systems. This powerful 12-slot rack provides superior connectivity for your Allen-Bradley modules. It handles complex industrial applications with robust construction and high power capacity.

Core Technical Specifications

• Brand: Allen-Bradley
• Model: 1771-A3B
• Module Capacity: 12 I/O slots for maximum system expansion
• Backplane Power: 24 Amperes maximum at 5V DC
• Input Voltage: 24V DC nominal system power
• Environmental Rating: IP20 for indoor use only

Physical & Environmental Specifications

• Operating Temperature: 0 - 60 °C (32 - 140 °F) range
• Weight: 5.9 kg (13 lbs) solid industrial build
• Shock Resistance: 15g operating, 30g non-operating durability
• Vibration Tolerance: 2g across 10-500 Hz frequency spectrum
• Part Number: Catalog No. 1771-A3B

System Integration & Compatibility

• Module Type: I/O Chassis for Allen-Bradley systems
• Design Purpose: Central backbone for PLC module installation
• Application: Industrial automation and control systems
• Typical Use: Manufacturing, processing, and machine control

Installation & Operation Guidelines

• Install in temperature-controlled indoor environments only
• Ensure stable 24V DC power supply for proper operation
• Calculate total module current to stay within 24A limit
• Mount securely to minimize vibration transmission
• Allow adequate ventilation for heat dissipation

Frequently Asked Questions (FAQ)

What makes the 1771-A3B different from smaller chassis models?

The 1771-A3B offers twelve slots and 24A power for larger, more complex systems needing extensive I/O points.

Can this chassis operate in high-temperature environments?

It operates reliably up to 60°C (140°F), making it suitable for most industrial indoor settings.

What type of power supply does this chassis require?

The chassis needs a stable 24V DC input power source for optimal performance and reliability.

How many modules can the 24A backplane support?

The 24A capacity can power multiple high-current modules across all twelve available slots.

Is this chassis suitable for mobile or vibrating equipment?

Yes, its 2g vibration resistance makes it appropriate for applications with consistent mechanical vibration.

What should I consider when planning a system with this chassis?

Consider total I/O points needed, module current requirements, and available panel space for installation.

For specific application support or to request pricing for the 1771-A3B, email us at sale@etowonauto.com.

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