VMIC VMIVME-6015 Quad Serial I/O Board

Module Feature

VMIVME-6015 is a single-slot 6U VMEbus quad full-duplex serial I/O module developed by VMIC (GE Fanuc / Abaco Systems). It adopts two MK68564 SIO dual-channel controllers to provide four independent full-duplex serial ports. Each channel can be individually configured for asynchronous or synchronous communication: asynchronous mode supports standard UART framing; synchronous mode supports byte-oriented BiSync and bit-oriented HDLC/SDLC protocols with onboard CRC-16 / CRC-CCITT generation & verification. Supported electrical interfaces include RS232C, RS422A, RS423 and RS485, suitable for point-to-point or multi-drop token-passing RS485 networks. Baud rate ranges from 0 up to 1 Mbaud, with dedicated baud rate generator per channel. Every port carries complete modem control signals; modem lines can also be reused as general-purpose discrete I/O. Receive register uses quad buffering and transmit register uses double buffering to reduce data overflow risk. VME bus interface supports A16 short addressing and D08/D16/D32 data transfer, works as VME slave and supports programmable VME interrupt for data event notification. Built-in BIT loopback self-test verifies transmit/receive path integrity for each channel. Front panel equipped with four 25-pin D-Sub female connectors for field wiring. Rugged Eurocard PCB with conformal coating,shock and vibration screened for power plant cabinet environment,widely used in gas/steam turbine field serial instrument communication,aerospace ground test bench,legacy industrial VME system upgrade and remote serial data acquisition chassis.

Working principle

VME host writes configuration parameters (protocol,baud rate,parity) and transmit data to onboard SIO registers. For outgoing data,the controller converts parallel VME bus data into serial stream and sends to field devices. For incoming serial signals,the chip recovers serial bits,assembles parallel data and stores in multi-stage receive buffer;when data arrives,the module triggers VME interrupt to notify host for reading. BIT loopback mode internally connects transmitter output back to receiver input to test channel integrity without external wiring. VME FPGA completes address decoding and bidirectional data handshake between VME backplane and SIO controller array. Onboard ESD and surge protection suppress transient noise from long field cables.

Onboard components

VME interface FPGA,dual MK68564 SIO serial controllers,four independent baud rate generators,multi-stage TX/RX buffer array,CRC calculation logic,BIT internal loopback circuit,modem control register bank,VME J1/J2 edge connector,front-panel four × 25 pin D-Sub female connectors,multi-status LED array.

LED indicators

Front panel LED indicators for channel transmit/receive activity.

Hardware self-diagnosis

Visual inspection of PCB,components and solder joints;board ID register readback verification;per-channel BIT loopback communication test;async/sync protocol and baud rate validation;VME A16 read/write and interrupt verification.

Programming software

VMIC serial I/O driver library and configuration utility,supports VxWorks,Linux and QNX real-time operating systems;software tool for channel protocol setup,baud rate configuration and error statistics reading.

Electrical & Process Parameters

Model: VMIVME-6015 Brand: VMIC Device type: 6U VMEbus four-channel multi-protocol serial communication module Bus standard: VMEbus, A16 addressing, D08/D16/D32 transfer,programmable VME interrupt Channel:4 independent full-duplex serial ports Protocol:Async / Sync(BiSync, HDLC, SDLC),CRC-16/CRC-CCITT Interface:Software configurable RS232C / RS422A / RS423 / RS485 Max baud rate:1 Mbaud Buffer:Quad RX buffer,double TX buffer per channel Control mode: VME slave access,per-port modem control,BIT loopback self-test,ESD & surge protection Power supply: +5 V, +12 V, -12 V from VME backplane Power consumption:0.85 A typical @ +5 V,100 mA max @ +12 V / -12 V Cooling: Convection cooling Protection: ESD protection,transient surge clamping Mounting: Standard single-height 6U VME front panel ejector locking Protection class: PCB with optional conformal coating

Mechanical & Structure

Mounting: Single-slot 6U VME Eurocard Protection class: PCB with conformal coating

Environmental

Operating temperature:0℃ ~ +60℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~90 % non-condensing Certification: CE compliant Status: VMIC 6U VME 4 channel multi-mode serial communication board

Installation

Follow ESD safety procedure before handling.Fully power off VME chassis.Insert VMIVME-6015 into vacant 6U VME slot and lock front panel ejector latches.Configure serial interface mode via software register settings.Connect field serial cables to front 25 pin D-Sub connectors.Power on chassis,load VMIC serial driver,run BIT loopback diagnostic before commissioning.

Interface

VME J1/J2 backplane connector,front-panel four × 25 pin D-Sub serial field I/O connector,interrupt and fault status register pins.

Diagnostic

Board undetected: poor VME backplane contact,damaged edge connector or incorrect A16 address setting. Serial data garbled: baud rate/parity mismatch or ground loop noise on field cable. Channel transmit/receive failure: SIO controller fault or damaged D-Sub connector pins. BIT loopback fail: internal serial path hardware fault.

Product Brief

VMIC VMIVME-6015 single height 6U VME quad serial I/O board,four full-duplex multi-protocol ports supporting async and HDLC/SDLC synchronous communication up to 1 Mbaud with built-in BIT self-test,for turbine serial instrument connection and aerospace ground test VME systems.