Astronics / EADS / Racal 1260-145A High-Density Switch Matrix Plug-In Module

The Astronics/EADS/Racal 1260-145A is a high-density switch matrix plug-in module for signal routing within the Adapt-a-Switch platform. It comprises nine independent 4×4 electromechanical relay matrices delivering up to 144 crosspoints. The tightly integrated relay subassemblies minimize stub lengths and enable field replacement in under ten minutes, reducing system downtime during maintenance or reconfiguration.

## Technical Specifications

**Matrix Configuration**
• Nine independent 4×4 matrices
• Up to 144 total crosspoints
• Bi-directional electromechanical relay operation
• Path resistance: 3 A from +5 V supply (fully enabled)

**Signal Integrity**
• Bandwidth (-3 dB): >42 MHz, >13 MHz, >24 MHz (multiple configurations)
• Insertion loss: 0.1 dB @ 300 kHz
• Isolation: >75 dB @ 300 kHz
• Crosstalk: <−63 dB @ 300 kHz
• Channel-to-chassis capacitance: <118 pF, <309 pF, <173 pF (multiple configurations)

**Physical**
• Dimensions: 4.5" H × 0.75" W × 9.5" D
• Weight: 9 oz (0.26 kg)

## Key Features

• Plug-in architecture supports rapid expansion and replacement without external loop-back connections
• Four-channel, two-wire analog bus integration via jumper installation on motherboard
• Carrier design dissipates approximately 100 W nominally
• Replaceable relay subassemblies minimize service time

## Compatibility & Integration

• VXI platform compatible
• Option-01T switch controller support with data-driven embedded descriptor independent of firmware revision
• VXIplug&play drivers for Win32: LabWindows/CVI and LabVIEW
• Scalable configuration using multiple plug-ins for larger matrix applications