otorola MVME333-2 6U VME Intelligent Serial Communication Controller (6 Independent Serial Channels, Onboard MC68010 Coprocessor)
- Product Code: MVME333-2
- Availability: In Stock
Motorola MVME333-2 6U VME Intelligent Serial Communication Controller (6 Independent Serial Channels, Onboard MC68010 Coprocessor)
Manufacturer: Motorola Computer Group, later Emerson Artesyn
Model: MVME333-2 (-2 = 2nd hardware revision, expanded buffer memory & reinforced surge protection)
Series Position: High-density intelligent serial front-end processor for full Motorola VME SBC lineup (MVME162, MVME5100, MVME5500), dedicated for Honeywell TDC3000 DCS field instrument serial access
Type: Single-height 6U VMEbus slave intelligent module, A24/D16 addressing, self-contained MC68010 10MHz coprocessor, independent serial data buffer without occupying host CPU resources
Core Function: 6-channel full-duplex synchronous/asynchronous serial data transceiver, multi-protocol conversion for field transmitters, analyzers, third-party PLCs; hardware DMA for high-speed synchronous links, large on-board RAM buffering, front-panel DB25 wiring terminals, full diagnostic LEDs; compatible with VxWorks industrial real-time OS
1. Product Overview
MVME333-2 is a dedicated intelligent serial controller VME slave board, different from simple transition I/O boards like MVME705B/MVME715P, it carries independent MC68010 10MHz coprocessor and 128KB local dynamic RAM to complete serial data framing, buffering and protocol processing locally, greatly reducing the serial polling load of host MVME CPU boards.
Equipped with six independent full-duplex serial channels, each channel supports software switching between asynchronous RS232/RS422 and synchronous HDLC/SDLC industrial protocols. Two channels support high-speed bidirectional DMA transmission up to 1Mbps for synchronous communication, while all six channels run asynchronous mode simultaneously at max 9600bps.
Revision -2 upgrades the original MVME333 hardware: expand buffer RAM capacity, add multi-stage LC power filter, upgrade transient suppression diodes, increase channel isolation voltage to resist high EMI interference in DCS cabinet environments. Front panel dual DB25 connectors lead out all six serial channels for on-site field wiring; rear P2 VME connector completes VME bus data interaction with host SBC.
Mainly used in Honeywell TDC3000 LCN racks to connect temperature/pressure flow transmitters, gas chromatographs, PLC slave stations and remote RTUs via RS422 multi-drop bus, widely deployed in petrochemical, thermal power and offshore process control systems.
2. Complete Technical Specifications
• VME Bus Interface: VMEbus Rev C.1 slave only, A24 short address space, D16 16-bit data width, configurable IRQ 1~7 interrupt levels
• On-Board Coprocessor: MC68010 10MHz independent communication processor, 2 EPROM firmware sockets for protocol firmware storage
• Local Buffer Memory: 128KB DRAM for serial data cache, larger than base MVME333 model
• Serial Channel Count: 6 fully independent full-duplex UART channels
• Supported Serial Protocols: Asynchronous RS232C / RS422; Synchronous HDLC / SDLC / Bisync
• Baud Rate Range: Asynchronous 50bps ~ 9600bps all channels concurrent; Synchronous max 1Mbps via DMA on Channel 1/2
• Serial Frame Parameters: 5/6/7/8 data bits, 1/1.5/2 stop bits, odd/even/no parity, XON/XOFF software flow control
• Channel Isolation & Protection: 2000VAC galvanic isolation per channel; ±15kV contact ESD, ±2kV line surge suppression, reverse polarity input protection
• Front Panel I/O: Dual DB25 female connectors for six serial field wiring; Power, VME ACTIVE, RX/TX channel status LED indicators
• Diagnostic Functions: Power-on self-test POST, channel communication error statistics, interrupt fault logging, watchdog for on-board coprocessor
• Power Supply: +5VDC VME backplane power; typical power consumption 7W, maximum 13W full channel load
• Operating Temperature: Standard industrial grade 0℃ ~ +55℃ forced air cooling; storage -40℃ ~ +85℃
• Mechanical Form Factor: Single-height 6U VME Eurocard, 233.4mm(H) × 160mm(W) × 20mm(D), single chassis slot
• Compatible Host SBC: MVME162 full series, MVME5100, MVME5500; Supported RTOS: VxWorks 5.x / 6.x
3. MVME333 vs MVME333-2 Hardware Upgrade Differences
1. MVME333-2 expands local serial buffer DRAM to 128KB, original MVME333 only 64KB
2. Added multi-stage LC power filter circuits to suppress VME switching noise and cabinet EMI interference
3. Upgraded isolation transformers and surge diodes to improve anti-interference performance for high-noise industrial sites
4. Optimized PCB trace layout to reduce serial crosstalk under full-channel concurrent transmission
5. Core MC68010 coprocessor, serial channel quantity and VME bus logic remain consistent
4. Core Application Scenarios
• Honeywell TDC3000 DCS LCN rack intelligent serial communication expansion: connect field transmitters, gas analyzers, third-party PLC slave stations via RS422 multi-drop bus
• Thermal power plant boiler & turbine VME cabinet multi-channel serial instrument data acquisition front-end processor
• Petrochemical refining distributed control system long-distance serial field communication interface
• Aerospace ATE automated test bench synchronous HDLC serial equipment control & data logging
• Telecommunication base station VME rack multi-channel serial RTU communication controller
Motorola / Emerson © MVME333-2 VME Intelligent 6-Channel Serial Controller