Allen Bradley 1771-A3B /B 12 Slot I/O Chassis

Allen-Bradley 1771-A3B/B 12-Slot I/O Chassis

The Allen-Bradley 1771-A3B/B is a 12-slot I/O chassis designed to house and interconnect various 1771 series I/O modules, forming a crucial component of the PLC-5 system. This chassis facilitates seamless communication between I/O modules and the processor or I/O adapter modules via its integrated backplane.

Key Features

• Modular Design: Accommodates up to 12 I/O modules, offering flexibility for system expansion and customization.
• Mounting Options: Supports both direct enclosure sub-panel mounting and standard 19-inch rack installation, providing versatility in various industrial settings.
• Robust Backplane: Delivers a maximum current of 24 Amperes at 5.25 VDC, ensuring reliable power distribution to all installed modules.
• Environmental Resilience: Operates efficiently within a temperature range of 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit) and can be stored between -40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit), with a relative humidity tolerance of 5% to 95%, non-condensing.
• Compliance and Safety: Certified for use in Class 1, Division 2 hazardous locations, Groups A, B, C, and D, adhering to stringent safety standards.

Specifications

• Dimensions: Approximately 19.0 x 13.35 x 8.7 inches (483 x 339 x 221 mm).
• Weight: Approximately 13 pounds (5.9 kg).
• Operating Voltage: 5.25 VDC.
• Backplane Current: 24 Amperes.
• Mounting Requirements: Utilizes ¼-20 (M6 x 10) mounting bolts; requires specific clearances for optimal air cooling and maintenance access.

The 1771-A3B/B chassis is engineered to provide a reliable and scalable foundation for industrial automation systems, ensuring efficient module integration and system performance.