The Racal Instruments 1260-20 is a power switch module featuring 20 independent Double-Pole Single-Throw (DPST) relays for switching AC line power, DC power supplies, and AC or DC current sources. Each relay channel supports up to 8 A at 250 VACrms or up to 5 A at 48 VDC, with a carry current rating of 10 A per channel. The modular design integrates directly into VXIbus systems and pairs with Racal Instruments Option 01 or Option 01T switch controllers for command-based operation.
Technical Specifications
• Configuration: 20 independent DPST relays
• AC Switching: 8 A at 250 VACrms per channel
• DC Switching: 5 A at 48 VDC per channel
• Carry Current: 10 A per channel
• Relay Coil Current Monitoring: Available for relay operation verification
• Series and Shunt Elements: Each channel includes mounting holes for arc suppressors and filters
– Key Features
• Independent channel operation enables custom switching network configurations
• Relay coil current monitoring provides confidence checking of proper operation
• Supplied with one set of mating connectors and solder pins; additional connectors available separately
• VXIplug&play driver support for LabWindows/CVI and LabVIEW frameworks
– Control and Integration
The 1260-20 requires a Racal Instruments Option 01 (native command set) or Option 01T (SCPI command set) switch controller. Option 01T is recommended for new designs and supports both message-based and register-based operation. Programming uses standard OPEN and CLOSE commands with channel addressing syntax (example: CLOSE 3.04 closes channel 4 on card address 3).
– Compatibility & Integration
Designed for VXIbus system integration with Adapt-a-Switch carrier compatibility. Supports GPIB and LXI connectivity through the appropriate controller module.
