Curtiss-Wright / Systran SCRAMNet SC150 VME6U Module

The Curtiss-Wright/Systran SCRAMNet SC150 VME6U module is a high-performance VMEbus board that implements replicated shared-memory architecture for deterministic, low-latency real-time data sharing across industrial and military systems. Applications write data directly to shared memory; the network hardware automatically broadcasts to all connected nodes, eliminating traditional networking protocol overhead and enabling precise synchronization for high-fidelity simulations, complex control systems, and critical data acquisition tasks.

## Technical Specifications

• Architecture: Replicated shared-memory design
• Data throughput: Up to 16.7 MB/sec
• Node latency: As low as 250 nSec/node
• Maximum nodes: 256
• VMEbus compliance: Revision C.3, ANSI/IEEE Standard 1014-1987
• Onboard SRAM: 128 KB soldered
• SIMM range: 512 KB to 8 MB
• Shared memory sizes: 4 KB, 128 KB, 512 KB, 1 MB, 2 MB, 4 MB, 8 MB
• Memory addressing: A24 standard bus or A32 extended bus; CSR-selectable with dynamic addressing
• CSR functionality: Switch-selectable address selector; virtual paging support
• Message capability: Variable-length packet support
• Interrupts: Dual-vector memory/error interrupt with maskable error interrupt
• Initialization: EEPROM-based
• Media options: Coaxial (paired conductor), fiber optic standard (62.5 µm core multi-mode), fiber optic long-link (62.5 µm core multi-mode)
• Fiber transmitter: 820 nm, ST threaded port, high-power TX
• Fiber receiver: 820 nm, ST threaded port, 125 MHz analog output

## Key Features

• Dual-port shared memory enables simultaneous host access and network data transfer
• Eliminates processor overhead for network communications
• Switch-selectable CSR address configuration
• General-purpose counter functionality
• Error interrupt masking capability

## VMEbus Integration

Slave device compliance with SADO32, SRMW32, and 8-bit vector ROAK support. Media card supports both coaxial and fiber optic connectivity options.