Astronics / EADS / Racal 1261AH 13-Slot High-Performance, High-Power VXI Mainframe

The Astronics / EADS / Racal 1261AH is a 13-slot, C-size VXI mainframe engineered for high-performance, high-power instrumentation and data acquisition systems in demanding applications. This 1260 Series platform delivers substantial power capacity and advanced thermal management to support multiple VXI modules in rack-mount or benchtop configurations. The mainframe combines intelligent system monitoring, efficient power delivery, and fault-tolerant cooling to ensure reliable operation in mission-critical test environments.

## Technical Specifications

**Form Factor & Architecture**
• 13-slot, C-size VXI mainframe compliant with VXI specification B.7.2.3
• Available in 7U (12.220 inches) and 9U rack-mount heights
• Integrated cable tray and hinged plexiglass access door

**Power Delivery**
• High-power designation with advanced supply design featuring minimal ripple and noise
• Direct backplane connection with high dynamic current capability
• 230 Volt option available

**Thermal Management**
• Pressurized plenum system with molded card guides for even airflow distribution
• Fault-tolerant triple-fan assembly—two fans maintain full cooling if one fails
• HI/LO cooling switch for adaptive noise/performance selection
• Snap-on covers direct airflow away from unused slots

**System Monitoring**
• Dual monitoring options with advanced triggering circuit for external synchronization
• Programmable delay circuit for external instrumentation handshaking
• Independently powered monitoring—does not consume VXI slots
• Intelligent system monitor integrated

## Key Features

• Supports C-size VXI modules in 13 slots
• Molded card guides ensure proper thermal and mechanical contact
• Modular design with optional intermodule shield kit (Option 52) for reducing radiated noise
• Shipping weight approximately 200 lbs

## Typical Applications

High-density automated test systems, signal processing platforms, and data acquisition networks requiring sustained high-power operation with precise thermal control and external trigger synchronization.

## Compatibility & Integration

Fully compatible with standard C-size VXI instrumentation. Available options include current sharing supply (1261B configurations), front extension mount assemblies for 24-inch racks, and cable trays (1U, 2U, 3U for 7U installations).