Allen-Bradley 1746-A7 SLC 500 Seven-Slot I/O Chassis

Overview  

The Allen-Bradley 1746-A7 is a seven-slot chassis from the SLC 500 series, designed to house I/O modules and provide reliable backplane connectivity. With support for up to two expansion chassis and compatibility with 1746-C7 and 1746-C9 cables, it offers flexibility for system growth while maintaining robust performance in industrial automation environments.

Technical Specifications

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model/Part Number: 1746-A7

• Product Line: SLC 500

• Category: PLCs

• Hardware Type: I/O Chassis

• UPC: 662468415361

• Weight: 2.69 lbs (1.22 kg)

• Slots: 7 module slots

• Expansion Capability: Supports up to 2 expansion chassis

• Expansion Cables: Compatible with 1746-C7 and 1746-C9

• Mounting: Panel mount with 4 mounting tabs

• Backplane Current:

• 5.1 V DC @ 10 A

• 24 V DC @ 2.88 A

• Operating Temperature: 0–60 °C (32–140 °F)

• Storage Temperature: -40–85 °C (-40–185 °F)

• Thermal Dissipation: 2.5 BTU/hour at 28.8 V DC

Key Features

• Seven-slot design for flexible module configuration

• Expansion capability for larger control systems

• Rugged construction suitable for industrial environments

• Reliable backplane current distribution

• Easy panel mounting with integrated tabs

Applications

• Industrial automation requiring modular PLC systems

• Control panels with multiple I/O modules

• Expansion of existing SLC 500 installations

• Machine-level control and monitoring systems

FAQ

• Q: How many slots does the 1746-A7 chassis provide?  A: It offers seven slots for I/O modules.

• Q: Can expansion chassis be added?  A: Yes, up to two expansion chassis can be connected.

• Q: Which expansion cables are supported?  A: 1746-C7 and 1746-C9.

• Q: What is the operating temperature range?  A: 0–60 °C.