The Astronics/EADS/Racal 1260-20 and 1260-20B Power Switch Module is a C-size VXI switch card that distributes and controls AC line power, DC power supplies, and current sources through 20 independent Double-Pole Single-Throw (DPST) relays. Each channel operates independently or configures into custom switching networks, supporting maximum switching currents of 8 A at 250 VACrms or 5 A at 48 VDC. The module integrates relay coil current monitoring for confidence checking and includes mounting holes on each channel for series and shunt elements such as arc suppressors or filters.
## Technical Specifications
• **Switch Configuration:** 20 independent DPST relays, each channel independently configurable
• **Maximum Switching Current:** 8 A at 250 VACrms; 5 A at 48 VDC (carry current up to 10 A)
• **Maximum Switching Voltage:** 250 VACrms or 48 VDC
• **Relay Coil Current Monitoring:** Integrated for operational assurance
• **Series/Shunt Element Support:** Mounting provisions on each channel
• **Form Factor:** C-Size VXI module
• **Connectors:** Supplied with one set of mating connectors and solder pins; additional connectors and crimp-type pins available separately
## Key Features
• Relay coil current monitoring for confidence checking and assurance of proper relay operation
• Independent channel operation enabling flexible network configurations
• Integrated provisions for arc suppressors, filters, and other protective elements
• Supplied with complete connector and pin package
## Control & Integration
• Requires Option 01 or Option 01T Smart Card Module for operation
• Option 01 operates with native command set
• Option 01T supports SCPI command set with message-based and register-based operation, including include, exclude, scan, and relay monitoring functions
• VXIplug&play driver support for Microsoft Win32 API
• Compatible with LabWindows/CVI and LabVIEW development environments
## Typical Applications
Automated test systems, power distribution switching, multi-source signal routing, and AC/DC load switching in VXI-based instrumentation platforms.
