Astronics / EADS / Racal 1260-30B Multiplexer VXI Module

The Astronics/EADS/Racal 1260-30B is a C-size VXIbus multiplexer module that provides dual 1×20 two-wire switching for signal routing in automated test and data acquisition systems. This electromechanical relay-based module handles switching up to 250 VDC or 250 VAC rms at currents to 2 A, with bandwidth to 10 MHz. It integrates into standard VXIbus chassis and operates under message-based or register-based control via an Option 01 Smart Card, making it suitable for multi-point scanning, continuity testing, and confidence checking via relay coil current monitoring. ## Technical Specifications • Form Factor: C-size, single-slot VXIbus module • Configuration: Dual 1×20 two-wire multiplexer • Switching Voltage: 250 VDC or 250 VAC rms maximum • Switching Current: 2 A maximum • Bandwidth: 10 MHz • Relay Type: Electromechanical • Power Supply: +5 VDC, 150 mA typical • Operating Temperature: 0 °C to 55 °C • Non-operating Temperature: −40 °C to +75 °C • Relative Humidity: 85 % ±5 % non-condensing at 30 °C • Operating Altitude: 10,000 ft maximum • Weight: 3.2 lbs (1.45 kg) without Option 01T ## Key Features • Relay coil current monitoring for confidence checking of switching integrity • Mounting holes per channel enable integration of user-supplied components • Register-based and message-based control protocols supported • Compact single-slot design for dense test system configurations ## Typical Applications • Multi-point UUT test scanning with DMM or continuity testers • High-voltage and high-current signal routing in automated test systems • RF and audio signal switching within integrated test platforms • Data acquisition point selection across multiple signal types ## Compatibility & Integration The 1260-30B requires integration into a VXIbus-compatible chassis and an Option 01 Smart Card configured as system master for control. It complies with EN61010-1 (safety), EN55011A (emissions), and IEC801-2, 3, 4 (immunity) standards. Proper third-wire earth grounding is mandatory for safe operation.