The SAS actuators require a 24 Vac or 24 Vdc, Class 2, supply and a 0 to 10 Vdc or 4 to 20 mA signal to control Powermite 599 Series terminal unit valves with 7/32-inch (5.5 mm) stroke. In the SAS61. 33U, a mechanical spring returns the valve to its normal position when there is no power supply.
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