GE Fanuc RX3i PacSystem 10-Slot Serial Expansion Backplane | IC694CHS392

Technical Overview

The IC694CHS392 serves as a high-density serial expansion baseplate within the GE Fanuc (now Emerson) PACSystems RX3i architecture. Engineered for versatile system scaling, this 10-slot backplane allows engineers to extend I/O capabilities up to 15 meters (50 feet) from the main CPU rack. It is specifically designed to house a broad range of discrete, analog, and specialty modules, ensuring seamless integration into complex automated environments.

Specifications

• Product Series: PACSystems RX3i

• Module Type: Serial Expansion Baseplate

• Total Slot Capacity: 10 Universal I/O Slots

• Dedicated Power Supply Slot: One (1) specific slot for RX3i Power Supply modules

• Expansion Interface: 25-pin D-shell female connector for serial link

• Max Interconnect Distance: 15 Meters (50 Feet) via expansion cable

• Current Draw: 150 mA at 5 VDC (Internal Logic)

• Module Compatibility: Supports all IC694 series I/O and option modules

• Mounting Configurations: Front panel mounting or recessed mounting supported

• Physical Weight: Approximately 0.94 kg (2.06 lbs)

• Hot Swapping: Note that Hot Insertion/Removal of modules is not supported on this specific serial backplane.

Deployment and Compatibility

The IC694CHS392 is frequently utilized in distributed control systems where I/O points are required at a distance from the central processor. Unlike the IC695 series universal backplanes, this expansion unit utilizes the serial bus, making it an efficient choice for standard I/O density without the overhead of PCI bus requirements.

How does this differ from the IC694CHS398?The IC694CHS392 provides 10 slots for modules, whereas the IC694CHS398 is a smaller 5-slot version. Both share the same 50-foot maximum cable length and electrical characteristics, allowing for flexible footprint planning depending on the specific I/O count required for the cabinet.

Common Troubleshooting and FAQ

Why is my expansion rack not being recognized by the CPU?Ensure the expansion cable is securely seated in the 25-pin D-shell connector and that the rack address is correctly configured. Also, verify that the power supply in the IC694CHS392 is operational, as expansion racks require their own local power source.

Can I place a CPU module in this backplane?No, the IC694CHS392 is a serial expansion baseplate and does not support CPU modules or high-speed PCI-based modules. It is strictly for I/O and option modules.