The Siemens SSD61U 24V, 0-10V NSR PICV Actuator
Pressure Independent Control Series SSD Electronic Valve Actuators require a 24 Vac
power supply and receive a floating control signal (SSD81…) or a proportional 0 to
10 Vdc signal (SSD61…) to control a valve. The 0 to 10V SSD61U actuator also
accepts a 24 Vdc power supply
The stroke travel on the SSD61U is proportional to the control signal Y. A zero voltage
control signal retracts the stem and returns the valve to its normal position. With no
supply voltage, the SSD61U actuator maintains its last position.