GE ACC-5595-208 | 8-Port Reflective Memory Hub, In Stock
GE ACC-5595-208 | 8-Port Reflective Memory Hub, In Stock - Image 2
GE ACC-5595-208 | 8-Port Reflective Memory Hub, In Stock - Image 3

GE ACC-5595-208 | 8-Port Reflective Memory Hub, In Stock

  • Model: ACC-5595-208 / 350-805595-208N
  • Brand: GE Intelligent Platforms (formerly VMIC / GE Fanuc)
  • Series: ACC-5595 Reflective Memory Network
  • Core Function: Acts as a managed fiber hub that keeps a reflective memory ring or star network alive by automatically bypassing failed or unpowered nodes.
  • Type: Reflective Memory Hub / Managed Fiber Switch
  • Key Specs: 8x SFP ports (multimode, up to 300 m); 2.125 Gbaud link rate with ~170–174 MB/s throughput; up to 256 cascaded nodes with <50 ms fault bypass.
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Description

Key Technical Specifications

Parameter Specification
Ports 8x SFP fiber ports
Fiber Type Multimode SFPs (ACC-5595-208); single-mode SFPs used on ACC-5595-280
Multimode Distance Up to 300 m per link
Link Rate 2.125 Gbaud (~2 Gb/s)
Throughput ~170–174 MB/s effective
Topology Star, ring, or hybrid; 1×8 or 2×4 loop mode
Max Nodes Up to 256 nodes when cascaded
Fault Handling Automatic node bypass on signal or sync loss; <50 ms bypass
Management RS-232 serial; Ethernet TCP/IP on supported firmware
Power AC 100–250 V, 1 A
Operating Temp 0°C to 65°C
Chassis 19-inch 1U rack-mount

 

Product Introduction

If your HIL rig, motion simulator, or turbine test cell depends on deterministic microsecond-level data sharing, the network backbone cannot be an afterthought. The GE ACC-5595-208 sits in that exact spot: a managed reflective memory hub built for the GE/VMIC 5565 family, handling star or ring fiber topologies without TCP/IP stack jitter.Engineers keep this unit in service because it is simple, deterministic, and easy to troubleshoot. Eight SFP ports give you enough room for an 8-node cell, and you can cascade hubs to reach 256 nodes when the system grows. The automatic bypass feature is the real lifesaver: a bad node or unplugged fiber does not have to take down the entire ring. With typical end-to-end delays in the low microsecond range and sub-microsecond sync jitter, it still holds up for hard real-time work. Just watch the firmware revision and SFP type. Mixing multimode and single-mode optics without a clear plan is how otherwise solid systems start throwing intermittent faults.

Quality SOP & Tech Pitfalls

The Lab Report (SOP)

  • Visual and counterfeit check: chassis, SFP slots, serial label, power connector, and board revision.
  • Live test on a reflective memory test rack with at least two 5565-family nodes.
  • Port-by-port optical link verification using a power meter or known-good SFPs.
  • Insulation and multimeter checks on AC input, fuse, and chassis ground.
  • Firmware version logging via RS-232; record before shipment.
  • ESD-safe bagging, foam protection, and sealed anti-static packaging.

I would not ship one of these without proving bypass behavior on the bench. A hub that boots fine but fails to isolate a dead node is worse than useless in a ring topology.The Engineer’s Warning (Pitfalls)

  • Firmware mismatch: Older firmware may not handle bypass on signal loss the same way as later revisions. GE documentation references firmware 02.00+ for certain receive-signal-loss behaviors. Check this before replacing a failed unit.
  • SFP confusion: The ACC-5595-208 is the multimode variant. Swapping in single-mode SFPs or mismatched patch cables can create link flaps that look like card failures.
  • Topology settings: The front-panel switch can configure an 8-port loop or two 4-port loops. If someone changes this during a panic swap, the network will not rejoin cleanly.

 

Installation & Configuration Guide

  1. Pre-Installation
    • Schedule a maintenance window. Reflective memory networks can survive single-node faults, but a hub swap is not routine hot-swap work unless your system architecture explicitly supports it.
    • Power down the hub and connected nodes if required by your safety procedure.
    • Photograph every cable, SFP position, loop mode switch, and LED state. This saves hours later.
    • Record the existing firmware version via RS-232 if the old unit is still accessible.
  2. Removal
    • Label every fiber cable by port number.
    • Note which SFPs are multimode vs. single-mode.
    • Remove AC power.
    • Unrack the unit or release mounting hardware carefully; do not yank fibers.
  3. Installation
    • Copy all DIP/switch and SFP positions from the old hub. The 1×8 vs. 2×4 loop setting alone can prevent the network from forming.
    • Install the same SFP types in the same ports.
    • Seat the hub in the 1U rack position and secure mounting screws.
    • Reconnect fibers exactly as labeled.
  4. Power-On & Testing
    • Apply AC 100–250 V and verify the power LED.
    • Check per-port LEDs for signal detect and sync status.
    • Connect to the RS-232 port and confirm firmware version, port status, and loop mode.
    • Bring reflective memory nodes online one at a time.
    • Verify deterministic data sharing across all nodes before returning the system to production.

Compatible Replacement Models

  • GE ACC-5595-208 (same model) — Direct replacement. Match firmware, SFP type, and loop configuration. Surplus and new-original stock are commonly available through industrial suppliers.
  • GE ACC-5595-280 — Same hub family, but optimized for single-mode fiber up to 10 km. Use this only if your plant runs long-distance fiber. Do not mix multimode and single-mode links without verified optics.
  • ️ Third-party reflective memory hubs (e.g., TH-HUB2G-208) — May advertise compatibility with GE 5565-family networks, but firmware behavior, bypass timing, and management commands can differ. Treat as a like-for-like candidate only after bench validation. Expect several hours of integration testing.

 

Frequently Asked Questions (FAQ)

Can I hot-swap the ACC-5595-208?
Not by default. The reflective memory cards and network may tolerate a single node dropout, but removing the hub can break the ring or star backbone. Only attempt live replacement if your system documentation, redundancy design, and risk assessment explicitly allow it.What is the difference between ACC-5595-208 and ACC-5595-280?
The -208 is the multimode version, typically up to 300 m. The -280 supports single-mode fiber up to 10 km. The hub hardware family is the same, but the optics and link distances are not interchangeable without planning.Will this work with PCIe-5565 or PCI-5565 cards?
Yes. The ACC-5595 hub is designed for the GE/VMIC 5565 reflective memory family, including PCI, PCIe, and cPCI node cards. Confirm card firmware and SFP compatibility before commissioning.Is 350-805595-208N the same as ACC-5595-208?
It is a related GE/VMIC part number for the same product family, but suffixes can indicate revision, packaging, or configuration differences. Verify the exact datasheet and firmware before treating it as a drop-in replacement.Do I need special fiber cables?
Use the correct fiber type for your SFPs. Multimode SFPs need multimode patch cables; single-mode SFPs need single-mode patch cables. Mismatched optics and cables cause intermittent link drops that look like hardware faults.How do I check the firmware version?
Connect to the RS-232 management port with a PC serial terminal. The hub reports port status, sync state, and firmware information. Record this before and after replacement.What warranty should I expect?
Many industrial suppliers offer a 1-year warranty on new or factory-sealed units, but terms vary by vendor and condition code. Always confirm warranty, return policy, and firmware revision in writing before payment.

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