The Astronics/EADS/Racal 1260-40A is a VXIbus matrix switch module engineered for signal routing in aerospace, defense, and telecommunications test systems. This C-size, single-slot module delivers 4×24 two-wire matrix switching with 20 MHz bandwidth and configurable architecture supporting 4×24, dual 4×12, or 8×12 matrix topologies. Non-latching relay architecture ensures safe failsafe operation—signal paths automatically disconnect upon power loss, protecting the Unit Under Test from unwanted signal injection during power cycling. The module switches up to 1 A DC or ACrms at voltages to 250 VDC or VACrms (terminal-terminal or terminal-chassis), with per-channel power handling of 30 W DC or 62.5 VA AC. Relay coil current monitoring provides confidence checking of switch state. Control is delivered via Option 01 Smart Card with message-based interface using standard syntax: “..”. Expansion connectors on the front panel enable larger matrix configurations. Mechanical relay endurance exceeds 10,000,000 operations.
## Technical Specifications
• **Switch Matrix:** 4×24 two-wire; configurable as 4×24, dual 4×12, or 8×12 matrices
• **Bandwidth:** 20 MHz
• **Voltage Rating:** 250 VDC or VACrms (terminal-terminal or terminal-chassis)
• **Current Capacity:** 1 A DC or ACrms per channel
• **Power Dissipation:** 30 W DC or 62.5 VA AC per channel
• **Relay Coil Current:** 150 mA base + 40 mA per energized relay (1 A maximum)
• **Relay Operations:** 10,000,000 mechanical cycles
• **Operating Temperature:** 0°C to 55°C
• **Storage Temperature:** −4°C to 75°C
• **Humidity:** 85% ±5% non-condensing below 30°C
• **Power Supply:** +5 V at 0.4 A (standard); +5 V at 2.8 A (with Option 01)
## Key Features
• Non-latching relay design with fail-safe power-loss disconnect
• Relay coil current monitoring for state verification
• Message-based control via Option 01 Smart Card
• Front-panel expansion connectors for matrix extension
• Compact C-size VXIbus form factor
## Typical Applications
• Automated Test Equipment (ATE) signal routing
• Aerospace and defense testing systems
• Telecommunications signal switching
• Multi-channel measurement switching
## Compatibility & Integration
• VXI platform integration
• Compatible with Racal Instruments 1260-100 and 1260-101 Adapt-a-Switch VXIbus carriers
• Legacy Racal Instruments branding
