The Racal Instruments 1260-30A is a single-slot C-size VXI multiplexer module engineered for precision signal routing and switching within VXIbus systems. It delivers configurable switching networks with fast relay operation and dual control interfaces—message-based for ease of programming and register-based for high-speed applications.
Technical Specifications
Switching Configuration
The 1260-30A supports four configurable multiplexer network topologies: one 1×40 two-wire multiplexer, two 1×20 two-wire multiplexers, four 1×10 two-wire multiplexers, or eight 1×5 two-wire multiplexers. This modularity allows users to optimize channel density and routing architecture for their specific test requirements.
Electrical Performance
Switching capacity reaches 2 A at up to 250 V, with a maximum power dissipation of 60 W (62.5 VA). Bandwidth extends to 10 MHz. Channel switching occurs in less than 10 ms including settling time. The relay mechanism is rated for 100,000,000 mechanical operations.
Connectivity and Interfaces
Positronic SGMC (solder) connectors supply the primary interface. Circuit pads accommodate user-supplied terminators, and mounting holes at each channel enable installation of additional components. The module integrates message-based control via optional Smart Card (Option 01) and native register-based control pathways.
– Key Features
• Configurable into four distinct multiplexer network architectures to match varying channel and scanning requirements
• Relay coil current monitoring for confidence checking and verification of proper relay closure
• Handles higher-power switching applications within the 2 A / 250 V envelope
• Fast switching with sub-10 ms channel closure time
• Dual programming paradigm: message-based for simplicity or register-based for high-speed control loops
• Extended relay life at 100 million mechanical operations
– Typical Applications
Ideal for switch-matrix scanning applications where multiple test points must be routed to a common measurement instrument. Common uses include automated continuity testing, DMM-based UUT test point scanning, and multi-channel signal multiplexing in production and field test environments.
– Compatibility & Integration
Supports VXIplug&play for Windows-based test frameworks. Native drivers available for LabWindows/CVI and LabVIEW. Register-based and message-based control interfaces enable integration into diverse software architectures and automated test systems.
