Abaco Systems / Ramix PMC675 Dual 100BaseFX Ethernet Controller PMC Module

The Abaco Systems PMC675 is a dual 100BaseFX Ethernet controller PMC module engineered for embedded network applications. It combines two 100BaseFX Ethernet controllers, a 400 MHz PPC RISC processor, and an Intel 21555 PCI bridge on a single-slot PMC form factor, delivering local intelligence and fault-tolerant connectivity in space-constrained systems. The onboard processor executes network tasks independently, reducing host CPU load and enabling advanced features like automatic dual-rail switching and failover redundancy - critical capabilities for applications transitioning from legacy FDDI infrastructure.

Technical Specifications

• Form Factor: Single-slot PMC (PCI Mezzanine Card)


• On-Board Processor: PPC @ 400 MHz


• Memory: 64 MB DDR


• Ethernet Controllers: Dual 100BaseFX with SC, ST, or LC fiber connector support


• PCI Interface: 64-bit, 66 MHz, 3V & 5V signaling via Intel 21555 bridge


• Power Consumption: 5.5 W @ 0.5 A (5V)


• Operating Temperature: 0 to +60 °C


• Storage Temperature: -40 to +85 °C


• Operating Humidity: 5% to 95% non-condensing


• MTBF: 263,000 hours

Key Features

• Onboard RISC processor offloads network processing from host system


• Optional failover firmware enables transparent network redundancy


• Embedded TCP/IP firmware option moves TCP/IP stack to module co-processor


• Data mover firmware supports direct buffer transfers


• Customizable firmware for application-specific intelligence


• Dual 100BaseFX ports for fiber-optic connectivity


• Conformal coating available

Compatibility & Integration Windows driver support confirmed. Drivers for VxWorks, Linux, LynxOS, and Solaris typically available for similar Abaco Systems products. Direct successor to the PMC665, leveraging standard PCI/PMC protocols for integration into existing embedded computing platforms.