The Racal Instruments 1260-40A is a VXIbus-compatible matrix switch module engineered for signal routing in high-performance test systems. This C-size module delivers 96 two-wire crosspoints configurable as a single 4×24 matrix, dual 4×12 matrices, or one 8×12 matrix. Non-latching guard relays automatically open upon power loss, protecting the Unit Under Test from signal leakage during power cycling. Relay coil current monitoring enables confidence checking of switch states through the message-based control interface.
Technical Specifications
• Switching Architecture: 96 two-wire crosspoints; selectable as 4×24, dual 4×12, or 8×12 true matrix configurations
• Maximum Switchable Voltage: 250 VDC or 250 VAC rms (terminal-to-terminal or terminal-to-chassis)
• Maximum Switchable Current: 1 A per channel (DC or AC rms)
• Maximum Switchable Power: 30 W DC or 62.5 VA AC per channel
• Path Resistance: Less than 1 Ω (initial)
• Isolation: Less than 10 pF (open channel); less than 70 pF (channel-to-chassis)
• Bandwidth: 20 MHz (typical)
• AC Performance (50 Ω load): Insertion loss less than 0.3 dB at 100 kHz; crosstalk less than −70 dB at 100 kHz
– Key Features
• Guard relays with non-latching design revert to open state on power loss
• Relay coil current monitoring for state verification
• Message-based control via Option 01 Smart Card Module
• True matrix architecture with row-input relay placement
– Typical Applications
Signal routing for automated test equipment (ATE), multipoint measurement systems, and switching matrices requiring fail-safe relay configurations with confidence checking.
– Compatibility & Integration
Designed for integration into VXIbus-compatible chassis. Requires Option 01 Smart Card Module for message-based control and programming. Supplied with one set of mating connectors; additional connectors available separately.
