The Curtiss-Wright/Systran SCRAMNet AHSB-DPCIG04M-T is a PCI module engineered for deterministic, low-latency inter-node communication in distributed real-time systems. It implements a replicated shared-memory architecture that enables multiple nodes to access and update data simultaneously with minimal overhead. The module delivers up to 16.7 MB/sec throughput and guarantees deterministic performance through a register insertion media access protocol that eliminates data collisions. Transport delay is 250 nSec per node, with node latency ranging from 250 nSec to 800 nSec for 4-byte packets and 250 nSec to 1.5 µSec for 16-byte packets.
## Technical Specifications
• **Data Throughput:** Up to 16.7 MB/sec (packet-size dependent)
• **Transport Delay:** 250 nSec per node
• **Node Latency:** 250 nSec–800 nSec (4-byte packets); 250 nSec–1.5 µSec (16-byte packets)
• **On-Board Memory:** Up to 8 MB replicated shared-memory via high-speed SRAM SIMM modules
• **Bus Interface:** PCI Local Bus Specification Rev. 2.1
• **ASIC Core:** Handles message reception, transmission arbitration, network control, memory management, interrupt handling, error detection and correction
• **Operating Temperature:** 0°C to 40°C
## Key Features
• Fiber optic connectivity: 820 nm (300 m max) and 1300 nm (3500 m max) interfaces with ST connectors on 62.5/125 micron multi-mode cable
• Coaxial connectivity: RG-58U 50 ohm cable with SMA connectors up to 30 m
• Shared-memory controller provides transparent interprocessor communication, reducing network I/O overhead
• V3 Semiconductor V363EPC PCI Bridge chipset
• Short-length adapter board designed for installation in the last PCI slot
## Typical Applications
Simulation and distributed test environments, real-time measurement and control systems, applications requiring deterministic inter-node synchronization.
## Compatibility & Integration
Backwards compatible with SCRAMNet+ and SCRAMNet Classic products (except GOLD RING protocol). Supports multiple backplane architectures including PCI, VME, ISA, EISA, PMC, SBus, GIO-32, and CompactPCI.
