Abaco Systems / VMIC VMIVME-9081/S-001001 Intelligent I/O Controller

The Abaco Systems VMIVME-9081/S-001001 is a third-generation Intelligent I/O Controller (IIOC) for VMEbus systems, delivering high-density, high-throughput I/O processing on a single board computer platform. It offloads I/O scanning, scaling computation, and engineering unit conversion from the host, reducing CPU overhead while maintaining deterministic performance. The IIOC communicates via Reflective Memory, 10/100 Mbit Ethernet, or VMEbus backplane, and includes offline and real-time loopback diagnostics for fault detection and isolation to the channel level.

– Technical Specifications

• Host Interface: Abaco Systems Reflective Memory (5550, 5576, 5565, 5588), 10/100 Mbit Ethernet, VMEbus backplane, or embedded slave CPU configuration
• Communication Protocols: Reflective Memory (RFM), TCP/IP via stream sockets (note: TCP/IP guarantees delivery but not deterministic timing; latency may exceed hundreds of milliseconds)
• Single Board Computer: V7768 Intel Ultra Low Voltage Celeron SBC or VMIVME-7700/VME-7700RC
• CPU Frequency: 1.07 GHz
• RAM: 512 MByte SODIMM
• I/O Capacity: Up to 12 I/O chassis with maximum 228 I/O boards
• I/O Board Support: Digital input/output, analog input/output, and synchro/resolver modules from Abaco Systems’ General Purpose I/O Board line

– Key Features

• Parallel operation with customer-furnished SBCs and external hardware
• Star network topology with IIOC as central node
• Input scanning and output update processing in firmware
• Engineering Unit (EU) and data-type conversion on-board
• Fault detection, fault isolation, and error reporting
• Command list processing to minimize host interaction during real-time I/O operations

– Typical Applications

• Industrial automation and process control
• High-determinism data acquisition systems
• Applications requiring offloaded I/O subsystem management

– Compatibility & Integration

Operates across mixed VMEbus architectures. Peer-to-peer Reflective Memory connections recommended for deterministic I/O timing; TCP/IP suitable for non-time-critical applications.