Toro Micro-Master Series User Manual page 148

Micro-Master Touch User Guide
are normal.
When no valves are operating, the voltage between Com to unused stations is approx. 7VAC
When one or more valves are operating, voltage between Com to unused stations is approx. 16VAC.
This is due to the feedback through the surge protection devices.
The surge protection devices have a very high impedance to normal voltages. Therefore no current
can be sourced from these outputs under these conditions.
When a standard solenoid is connected across these inputs the voltage will be 0VAC.
The varistor surge protection devices will change to a very low impedance only under over-voltage
surge conditions in excess of 50VAC.
© 2014 Toro Australia Pty Ltd 140 Ver 1.2, June 2014