Curtiss-Wright / Systran SCRAMNet SC150 VME6U Module

The Curtiss-Wright/Systran SCRAMNet SC150 VME6U module is a 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.