The Taco SR506-4 Switching Relay is the best choice for all your zoning needs, with advanced PowerPort Cards, external diagnostic lights, switchable priority, and contractor-friendly PC board layouts. Combined with the time-proven reliability of the families of circulators and thermostats, total system integrating is achieved.
External indicator lights provide instant diagnostic feedback, making a snap of service calls or new installation start-ups.
- 24-Volt power input or output terminal
- Fuse protected
- Simplified wiring
- Compact design