Product Overview

The GE IC695RMX128CA serves as the critical hardware link for high-availability PACSystems RX3i configurations. This Redundancy Memory Xchange (RMX) module facilitates the ultra-high-speed synchronization of control data between a primary and a redundant CPU. By utilizing fiber-optic links, it ensures that the backup controller maintains a mirrored image of the system state, allowing for a seamless bumpless transfer if the primary unit fails. We supply this module as 100% Brand New, original hardware to ensure the integrity of your mission-critical control loops.

Technical Specifications

Engineering Advantages

Bumpless Control Transfer
The IC695RMX128CA executes data synchronization at the end of every scan. This ensures the secondary CPU takes control within milliseconds of a fault, preventing process interruptions in continuous manufacturing or power generation.

Fiber Optic Isolation
The use of fiber-optic cabling provides total electrical isolation between redundant racks. This prevents ground loops and protects the control system from high-voltage surges or electromagnetic interference (EMI) common in heavy industrial environments.

Deterministic Data Exchange
The dedicated reflective memory architecture operates independently of the PLC backplane traffic. This design guarantees fixed, predictable synchronization times regardless of the complexity of the user application or network load.

Simplified Configuration
Engineers configure the RMX module through PAC Machine Edition (PME). The software allows for easy selection of memory areas for synchronization, reducing the manual coding required to set up a redundant system.

FAQs

Does the IC695RMX128CA require a separate synchronization cable?
Yes, you must connect two RMX modules (one in each rack) using high-quality multi-mode fiber optic cables. This dedicated link handles all redundancy traffic, leaving the Ethernet ports free for HMI and SCADA communications.

Can I use this module in a standard non-redundant rack?
While the module fits in any universal backplane, its primary purpose is redundancy. In a non-redundant setup, it can function as a high-speed reflective memory node to share data with other PCs or PLCs equipped with similar hardware.

Is the “CA” version compatible with older “A” or “B” RMX modules?
For optimal stability in redundancy, we recommend using identical hardware revisions (“CA” to “CA”). However, the “CA” revision is designed to be backward compatible and serves as the current replacement for discontinued legacy versions.

What happens if the fiber optic link is broken?
If the link fails, the RMX module alerts the CPU immediately. The system will typically trigger a redundancy alarm, and the backup CPU will go into a “Not Synchronized” state to prevent an uncoordinated takeover.