SR501 Switching Relay

The Taco Switching Relay is the best choice for all you zoning needs, with advanced Power Port Cards, external diagnostic lights, switchable priority and contractor friendly PC board layouts. Combined with the time proven reliability of the 00 family 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.”,”highlights”:[“Advanced power port cards for zoning”,”External indicator lights offer diagnostic feedback”,”Compact design and simplified wiring allow easy installation”