VMIC VMIATX-5553 Reflective Memory Board

Module Feature

VMIATX-5553 is an ATX form factor fiber-optic reflective memory node board developed by VMIC (GE Fanuc / Abaco Systems),designed for ATX industrial PC platform to build high-speed real-time shared memory network. It belongs to classic VMIC 5500 reflective memory family and can interwork with VMIVME-5550,PCI-5565 and other RFM nodes to construct mixed VME/PC multi-chassis simulation system. Onboard high-speed RFM controller realizes hardware automatic memory mirroring; once local memory data is updated,data will be broadcasted to all nodes on fiber ring without CPU intervention. It supports programmable inter-node interrupt,one node can trigger event notification to single node or all nodes on network. Onboard SDRAM memory capacity is configurable for different project demands. Fiber optical interface provides galvanic isolation to eliminate ground loop interference between racks. Built-in BIT diagnostic continuously monitors fiber link state,memory integrity and error count;status register can be polled by host software. Rugged PCB with conformal coating,shock and vibration screened for harsh industrial environments,widely used in gas/steam turbine distributed control network,aerospace multi-chassis hardware-in-loop simulation and defense ground test bench.

Working principle

When ATX host writes data into local reflective memory space,onboard RFM controller captures data change automatically and broadcasts to every node on fiber ring via optical transceiver. All remote nodes update their local memory copy synchronously,application software accesses local memory directly without network protocol stack overhead. Inter-node interrupt logic sends trigger signal over fiber channel for multi-task synchronization. BIT circuit monitors optical signal and memory read/write health continuously,records error events for fault diagnosis. ATX FPGA completes bus address decoding and bidirectional data handshake between host and onboard memory bank. Optical transceiver isolates electrical signals and suppresses common-mode surge noise.

Onboard components

ATX bus interface FPGA,reflective memory controller,configurable SDRAM memory bank,fiber optical transceiver module,hardware broadcast logic,inter-node interrupt controller,BIT fault monitoring register bank,ATX gold finger edge connector,front panel duplex fiber connectors,multi-status LED array.

LED indicators

Front panel LED indicators for fiber link lock and network fault alarm.

Hardware self-diagnosis

Visual inspection of PCB,components and solder joints;board ID register readback verification;onboard SDRAM full read/write test;fiber loopback communication verification;ATX bus resource communication test.

Programming software

VMIC reflective memory driver library and configuration utility,supports VxWorks,Linux and QNX real-time operating systems;software tool for memory mapping,node interrupt configuration and fault log reading.

Electrical & Process Parameters

Model: VMIATX-5553 Brand: VMIC Device type: ATX bus fiber optic reflective memory module Bus standard: ATX industrial PC bus Onboard Memory: Configurable SDRAM Network medium: Duplex fiber,ring topology Core function: Hardware transparent memory broadcast,inter-node interrupt,galvanic optical isolation Control mode: ATX slot powered,hardware RFM mirroring,BIT real-time link monitoring,ESD & surge protection Power supply: Powered by ATX motherboard slot Cooling: Convection cooling Protection: ESD protection,transient surge clamping,optical power over-limit protection Mounting: Standard ATX bracket installation Protection class: PCB with optional conformal coating

Mechanical & Structure

Mounting: Standard ATX board Protection class: PCB with optional conformal coating

Environmental

Operating temperature:0℃ ~ +70℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:20~80% non-condensing Certification: CE compliant Status: VMIC ATX fiber reflective memory node board for real-time multi-node simulation

Installation

Follow ESD safety procedure before handling.Fully power off ATX industrial PC.Insert VMIATX-5553 into vacant ATX slot and fasten bracket screw.Connect duplex fiber cables to build daisy-chain RFM ring network.Assign unique node ID for every RFM board.Power on industrial PC,load VMIC RFM driver,run BIT fiber link diagnostic before commissioning.

Interface

ATX gold finger edge connector,front-panel duplex fiber connector,interrupt and fault status register pins.

Diagnostic

Board undetected: ATX slot gold finger contamination,BIOS resource conflict or board hardware fault. Fiber link loss: dirty fiber end face,incompatible fiber type or transceiver damage. Continuous transmission error: excessive fiber length or poor shielding causing signal distortion. Cross-node interrupt failure: interrupt register misconfiguration or unstable fiber link.

Product Brief

VMIC VMIATX-5553 ATX fiber reflective memory board,hardware memory mirroring and inter-node interrupt,compatible with VMIC classic RFM series for mixed VME/ATX multi-node ring network,suitable for turbine distributed control and aerospace hardware-in-loop real-time simulation systems.