The Astronics / EADS / Racal 1250-20 is a modular power switching module designed to manage and distribute AC or DC power within test systems and electronic equipment. It integrates ten independent Double Pole Single Throw (DPST) relays capable of switching up to 8 A at 250 VAC rms or up to 5 A at 48 VDC, making it suitable for industrial and aerospace applications requiring reliable power control.
## Technical Specifications
• Relay Configuration: 10 independent DPST relays
• AC Switching: Up to 8 A rms at 250 VAC rms
• DC Switching: Up to 5 A at 48 VDC
• Auxiliary Supply: Fused +13 VDC for external relay drive
• Contact Monitoring: User-selectable confidence checking
• Channel Architecture: Separate connections to both sides of each relay contact for independent operation or custom network configuration
## Key Features
• Terminal block for simplified field connections
• Per-channel mounting holes for arc suppressors, filters, and other external components
• Relay contact monitoring with selectable verification
• Modular design compatible with the Racal 1250 Universal Switch Controller mainframe
• Fused auxiliary DC supply eliminates external power distribution complexity
## Typical Applications
• Manual test systems requiring multi-channel AC/DC power switching
• Automatic test equipment with relay-based signal routing
• Industrial control and monitoring systems
• Aerospace test benches and validation platforms
## Compatibility & Integration
The 1250-20 operates as a dedicated switching module within the Racal 1250 Universal Switch Controller series. It integrates directly into the controller mainframe without additional adapters. Separate relay contact connections allow flexible configuration for series, parallel, or independent switching topologies. The integrated terminal block simplifies wiring and reduces integration time in both bench and production test environments.
