GE VMIACC‑5595‑208 / 350‑805595‑208N

Overview

The GE VMIACC‑5595‑208 (also referenced as 350‑805595‑208N) is a high‑performance reflective memory hub assembly engineered for real‑time networking in industrial and embedded systems. Originally developed under the General Electric brand (often through its VMIC/GE Fanuc heritage), this module plays a crucial role in deterministic data sharing across distributed processing nodes.

Reflective memory technology allows data written at one node to be automatically mirrored (“reflected”) across memory at all connected nodes, enabling ultra‑low latency, synchronized data exchange — ideal for high‑speed control and real‑time automation.

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Key Features

• High‑Speed Data Network: Operates at 2 Gb/s for fast and reliable communication.

• Multiple Fiber Ports: Up to 8 SFP transceiver ports support multimode or single‑mode fiber for flexible topology and long‑distance links (up to ~10 km).

• Automatic Node Bypass: Faulty or disconnected nodes are bypassed automatically to keep the network stable and running.

• Signal Regeneration: Each port regenerates optical signals to minimize insertion loss and jitter.

• Scalable Architecture: Can be cascaded with other hubs to connect up to ~256 nodes in a reflective memory network.

• Remote Management: Includes Ethernet (10Base‑T) and RS‑232 ports for network monitoring, configuration, and diagnostics.

• Rack or Desktop Option: Available in 19″ 1U rack mount or desktop enclosure for flexible deployment.

  
  

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Technical Specifications

Specification	Description
Manufacturer	GE (General Electric / GE Fanuc / VMIC)
Model Number	VMIACC‑5595‑208 / 350‑805595‑208N
Product Type	Reflective Memory Hub Assembly
Data Rate	2 Gb/s
Fiber Ports	Up to 8 SFP (Small Form‑Factor Pluggable)
Fiber Support	Multimode and Single‑Mode
Max Link Distance	Up to ~10 km
Network Scale	Cascadable up to ~256 nodes
Remote Interfaces	10Base‑T Ethernet & RS‑232
Power Supply	Internal universal power supply (e.g., 90–264 VAC)
Mounting Options	1U Rack or Desktop
Operating Temp.	Typically 0 °C to +65 °C (varies by variant)
Certifications	CE, UL, TUV (depending on variant)

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Architecture & Design

The VMIACC‑5595‑208 hub is built around fiber‑optic reflective memory networking, a technology that ensures all connected nodes share an identical copy of a designated memory space in near real‑time. Its key design highlights include:

• SFP‑Based Fiber Ports: Flexible configuration to support different fiber types and distances.

• Automatic Bypass Logic: Detects loss of signal or sync on any port and isolates that node to maintain network continuity.

• Signal Regeneration per Port: Enhances signal quality over long fiber runs and reduces data error.

• Management Interfaces: Ethernet and serial ports enable remote diagnostics, configuration, and network health monitoring.

This design makes the module robust in environments where timing precision and signal integrity are mission‑critical.

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Typical Applications

The VMIACC‑5595‑208 hub assembly is suited for systems requiring synchronous data sharing and real‑time communication across distributed nodes:

• Industrial automation and process control (factories, plants)

• Real‑time simulation systems (e.g., flight/vehicle dynamics simulators)

• Aerospace and defense networks where deterministic data timing matters

• High‑speed data acquisition and embedded control setups

• Distributed DCS and PLC based systems with real‑time constraints

Its deterministic communication characteristics make it ideal for scenarios where even microsecond‑level delays can impact system behavior.

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Installation & Integration

To operate effectively:

1. Install the hub in a compatible rack or desktop enclosure with proper cooling and grounding.

2. Connect SFP transceivers on fiber ports according to desired topology (ring, star, etc.).

3. Power the unit using its internal universal supply (typically AC mains).

4. Configure network settings via Ethernet or RS‑232 interfaces for remote control and diagnostics.

5. Cascade hubs if expanding the network beyond a single segment.

Proper fiber termination and cleaning are essential to ensure signal quality and minimize reflection losses.

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Advantages

• Low‑Latency Real‑Time Networking: Reflective memory networks share data across nodes without host CPU intervention, enabling fast, deterministic performance.

• High Reliability: Automatic bypass and signal regeneration increase uptime and fault tolerance.

• Flexible Topology: Supports various network structures and distances.

• Remote Monitoring: Built‑in interfaces simplify maintenance and troubleshooting.

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Summary

The GE VMIACC‑5595‑208 / 350‑805595‑208N Reflective Memory Hub Assembly is a critical communication device for real‑time, high‑speed distributed control networks. Featuring multiple fiber channels, automatic bypass, and extensive scalability, it ensures deterministic data sharing and high reliability in industrial, aerospace, and simulation applications where synchronized memory is essential.