VMIC RS85 332-999996-000 Reflective Memory Ring Termination Module

Module Feature

RS85 (PN:332-999996-000) is a single-slot 6U VMEbus ring termination module designed for VMIC 5565 family fiber reflective memory network. It provides precise optical power termination and high-frequency impedance matching at the physical end of fiber ring, eliminates signal reflection and ringing distortion which causes communication bit error. Fully interoperable with VMIC 5530M, VMIVME-5565, VMIPCI-5565 and VMIPMC-5565 reflective memory nodes. VME bus interface supports A16/A24 addressing and D08/D16/D32 data transfer, works as VME slave for status reading and configuration. Dual SC fiber ports serve as ring termination point; passive optical matching core with low insertion loss. Built-in BIT diagnostic continuously monitors optical receive power, detects loss of optical signal and power supply fault, latches alarm status and drives front panel LED indicator. Rugged Eurocard PCB with conformal coating,shock and vibration screened for power plant cabinet environment,widely used in gas/steam turbine distributed control,hardware-in-loop real-time simulation,aerospace test and long-distance multi-node reflective memory VME chassis.

Working principle

At the terminal position of fiber reflective memory ring, incoming optical signal enters RS85 termination module. Precision optical matching network absorbs residual optical energy, suppresses reflected wave back into fiber cable to avoid signal distortion and data corruption. VME interface only reads module health status; optical termination function runs passively without CPU intervention. BIT circuit samples received optical power and compares against preset threshold to judge link integrity. VME FPGA completes address decoding and status register readback for host system.

Onboard components

VME interface FPGA,precision optical termination network,dual SC fiber connectors,BIT optical power monitoring circuit,status register bank,VME J1/J2 edge connector,front-panel dual SC fiber ports,multi-status LED array.

LED indicators

Front panel LED indicators for board +5 V power,input optical power present,ring status and termination fault alarm.

Hardware self-diagnosis

Visual inspection of PCB,front ejectors and solder joints;board ID register readback verification;optical power level measurement;termination return loss test;VME A16/A24 read/write communication test.

Programming software

VMIC reflective memory driver library,universal board configuration and BIT diagnostic utility,supports VxWorks,Linux and QNX real-time operating systems;software tool for fault status reading and alarm log retrieval.

Electrical & Process Parameters

Model: RS85 332-999996-000 Brand: VMIC Device type: 6U VMEbus reflective memory fiber ring termination module Bus standard: VMEbus, A16/A24 addressing, D08/D16/D32 transfer Fiber interface: Dual SC fiber ports Function: Optical signal termination,impedance matching,reflection suppression Control mode: VME slave for status readout,passive optical termination,BIT built-in self-test,optical power monitoring Power supply: +5 V from VME backplane Cooling: Convection cooling Protection: Optical over-power protection,ESD protection,overcurrent protection Mounting: Standard 6U VME front panel ejector locking Protection class: PCB with optional conformal coating

Mechanical & Structure

Mounting: Standard single-slot 6U VME Eurocard Protection class: PCB with optional conformal coating

Environmental

Operating temperature: 0℃ ~ +65℃ Storage temperature: -40℃ ~ +85℃ Ambient humidity: 20~80% non-condensing Certification: CE compliant Status: VMIC 6U VME RFM fiber ring termination board

Installation

Follow ESD safety procedure before handling.Fully power off VME chassis.Insert RS85 332-999996-000 into vacant 6U VME slot and lock front panel ejector latches.Connect fiber cable from last RFM node to RX port of RS85 to complete ring termination.Power on chassis,load VMIC RFM driver,run BIT optical diagnostic before commissioning.

Interface

VME J1/J2 backplane connector,front-panel dual SC fiber ports,fault status signal pins.

Diagnostic

Board undetected: poor VME backplane contact,damaged edge connector or incorrect base address jumper setting. BIT low optical power alarm: insufficient transmit power or fiber attenuation too large. Ring bit error: missing RS85 termination or bad fiber connection. No optical signal: broken fiber cable or reversed TX/RX wiring.

Product Brief

VMIC RS85 332-999996-000 single height 6U VME reflective memory termination module,precision passive optical termination and impedance matching,suppress fiber signal reflection for 5565 series RFM ring,for multi-node distributed real-time control and hardware-in-loop simulation VME systems.