Siemens Electric Rotary Actuator SAS31 Actuators with 5.5 mm stroke and 400 N force Technical Data Sheet SAS31.. Operating voltage AC 230 V, 3-position control signal SAS61.. Operating voltage AC 24 V / DC 24 V, positioning signal DC 0-10 V / DC 4-20 mA / 0-1000 Ω SAS61../MO Operating voltage AC 24 V / DC 24 V, RS485 for Modbus RTU communication SAS81.. Operating voltage AC/DC 24 V, 3-position control signal Direct mounting on valves; no adjustments required Download PDF Now