Allen-Bradley 1746-A7 SLC 500 Modular Chassis 7-Slot Backplane for 1746 I/O and SLC 500 Processors

Allen-Bradley 1746-A7 7-Slot SLC 500 Modular Control Platform

The Allen-Bradley 1746-A7 is a 7-slot modular chassis designed for the SLC 500 control family, providing a stable backplane for 1746 I/O, specialty modules, and SLC 500 processors. This chassis supports flexible PLC system layouts while maintaining compatibility with legacy and installed-base automation environments.

1746 Modular Backplane Architecture

• Seven available module slots for SLC 500 processors and 1746 I/O
• Supports discrete, analog, and specialty 1746 modules
• Side-mounted 1746-series power supply compatibility
• Rigid backplane design for industrial control cabinets

Scalable SLC 500 System Design

The 1746-A7 chassis supports multi-chassis expansion using 1746 interconnect cables, allowing controllers to address additional racks as system requirements grow. The power supply mounts externally on the left side, preserving all slots for functional modules.

Industrial Applications

• Legacy SLC 500 PLC system maintenance and expansion
• Manufacturing and material handling control panels
• Industrial automation retrofit projects