Features:
- Shares reflective memory over a deterministic 2.12 GBaud multimode-fiber ring.
- Provides a dedicated data path between primary and secondary RX3i redundancy CPUs.
- Uses 128 MB of network memory without consuming RX3i CPU processing for transfers.
The module can serve either a general reflective-memory network or a CPU redundancy link.
Data written by one reflective-memory node is propagated automatically to every compatible node on the ring.
Redundancy service uses a dedicated two-node fiber path and changes which general network functions remain available.
The General Electric IC695RMX128 Redundant Memory Xchange Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
General Electric IC695RMX128 Redundant Memory Xchange Module Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Multimode Network Path
- Topology: Transmit and receive ports form a closed daisy-chained fiber loop.
- Distance: The multimode IC695RMX128 link supports as much as 300 m between nodes.
- Connector: LC interfaces conform to IEC 61754-20 and require clean, correctly crossed fiber paths.
- Ring Rule: A hub is not permitted between modules assigned as a redundancy pair.
Reflective Address Flow
- Automatic Replication: A write at one node updates the same network location at the other active nodes.
- Memory Segments: The configurable offset groups nodes by the 16 MB address segment they use.
- Packet Handling: The module adjusts packet size dynamically from 4 to 64 bytes.
- Interrupt Data: Four general network interrupts each carry 32 bits of associated data.
Primary and Secondary Pairing
- Dedicated Ring: One module in each CPU system and two fibers create the required two-node path.
- Exclusive Role: A module assigned to redundancy cannot simultaneously act as a general-purpose Memory Xchange node.
- Link Quantity: Up to two RMX modules can be configured as redundancy links in one main rack.
- Recommended Design: Emerson recommends two redundancy links, using four RMX modules, where the architecture requires it.
Backplane and Service Boundaries
- Slot Format: The module occupies one slot in an RX3i Universal Backplane.
- Power Draw: The rack supplies 580 mA at 3.3 VDC and 220 mA at 5 VDC.
- Hot Maintenance: Insertion and removal follow the documented RX3i powered-maintenance procedure.
- EMC Control: A metal enclosure is required to meet the radiated-emissions requirements.