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Product Model: IC698RMX016-CB
Product Brand: GE Fanuc / GE Intelligent Platforms (Emerson)
Product Series: PACSystems RX7i Redundancy & Communications
Product Features:
• Redundancy Memory Xchange (RMX) reflective memory module for high-availability PLC systems.
• 16 MB user SDRAM with high-speed fiber optic network interface (LC type).
• Supports hot-standby and reflective memory networks for dual-CPU systems.
• Designed for critical industrial and process-control redundancy applications.
Technical Specifications
| Specification | Details |
|---|---|
| Model Number | IC698RMX016-CB |
| Product Type | Redundancy Memory Xchange (RMX) Module |
| Series | GE Fanuc / GE Intelligent Platforms PACSystems RX7i |
| User Memory | 16 MB SDRAM |
| Reflective Memory | Up to 16 MB dynamically mirrored |
| Operating Voltage | +5 V DC (backplane supply) |
| Current Requirement | ~1.8 A |
| Connector Type | Fiber Optic LC (IEC 61754-20) |
| Insertion Loss (Max) | 0.35 dB |
| Return Loss | -30 dB |
| Network Speed | ~2.12 Gbaud reflective network |
| Hot Swap | Supported |
| Nodes per Network | Up to 256 |
| Operating Temperature | -20 °C to +85 °C |
| Mounting | RX7i Main Rack—recommended Slot 3/4 |
- IC698RMX016-CB
Product Role & System Fit
The IC698RMX016-CB fills a very specific but critical niche: it is a Redundancy Memory Xchange (RMX) module that enables reflective memory communication between multiple CPUs or nodes within a PACSystems RX7i control system. Reflective memory refers to a distributed memory architecture where data written to one node is automatically and deterministically propagated to all other nodes on the network — providing a shared, synchronized dataset that forms the basis for high-availability control logic.
Unlike standard communications modules that merely exchange messages, the RMX mechanism ensures that each CPU in a redundant pair has a consistent view of the process data at every control sweep. This is essential for hot stand-by redundancy, where a backup processor must take over without data loss or control interruption. In this context, the IC698RMX016-CB is not optional — it’s central to the failover strategy. Without it, truly redundant PLC operation isn’t achievable in RX7i systems.
From a system architecture perspective, the IC698RMX016-CB mounts on the RX7i main rack (often recommended in slots 3 or 4 for priority mapping) and connects over a fiber optic network to its counterpart or other reflective memory nodes. Through hardware configuration delivered by the main CPU, this module integrates into memory maps and data exchange cycles, handling packetized reflective memory transactions at dynamic packet sizes. The result is not only fast synchronization but also efficient utilization of network bandwidth.
Because this module derives its setup information and operational parameters from the CPU firmware and system configuration, it remains compatible across a range of PACSystems RX7i hardware revisions — making it a reliable choice for upgrades, expansions, and long-term automation roadmaps.
