Description

The Allen-Bradley 1746-A2 is a 2-slot modular chassis designed for the SLC 500 control system. As the most compact chassis in the SLC 500 product line, it is primarily used as an expansion rack for adding I/O points to an existing system or as a remote I/O station when utilized with an appropriate adapter module. Despite its small form factor, the 1746-A2 provides the necessary backplane communication and power distribution required for standard 1746 I/O modules.

Features

• Compact 2-slot design for space-constrained industrial environments.
• Supports one processor or I/O adapter in Slot 0 and one additional I/O module.
• Compatible with standard SLC 500 backplane communication protocols.
• Supports system expansion by interconnecting up to three chassis total using standard chassis interconnect cables.
• Robust backplane power distribution for reliable module operation.

Applications

The 1746-A2 is ideal for small-scale automation tasks, remote I/O drops, or as a secondary expansion rack in larger SLC 500 control architectures. It is commonly deployed in manufacturing, material handling, and process control systems where modularity and footprint efficiency are required.

Technical Specifications

Installation Guidelines

• Ensure the chassis is mounted on a flat, vibration-resistant surface using the provided mounting holes.
• Maintain adequate clearance around the chassis to allow for proper airflow and heat dissipation.
• Always power down the system before installing or removing modules from the chassis to prevent electrical damage.
• Ensure all modules are fully seated and the retaining screws are tightened to secure the connection to the backplane.
• When using multiple chassis, ensure interconnect cables are properly routed and shielded from high-EMI sources.
• Follow standard ESD precautions when handling the chassis and modules to prevent damage to sensitive electronic components.

FAQ

Can the 1746-A2 be used as a standalone processor rack?

Yes, the 1746-A2 can house an SLC 500 processor in Slot 0, allowing it to function as a small, standalone controller rack.

How many chassis can be connected together?

You can connect up to three chassis in a single local system using the appropriate chassis interconnect cables.