Function | Decription | Type |
---|---|---|
3-position control | A 3-position signal controls the actuator via connection terminals Y1 or Y2. The desired position is transmitted to the valve. | SAX31.., SAX81.. |
Modulating control | The modulating positioning signal provides stepless motor control. The positioning signal range (DC 0...10 V / DC 4...20 mA / 0...1000 Ω) corresponds to the positioning range (closed...open, or 0…100% stroke) in a linear manner. | SAX61.. |
Positioning signal and characteristic changeover | Setting with DIL switch. Factory setting:
| |
Position feedback U | Signal returned to acquire the position via input. | SAX61.., SAX61../MO |
Forced control (Z-mode) | Forced control helps override automatic mode and is implemented via higher control. | |
Calibration | Carry out during initial commissioning. The actuator drives to the top or bottom end position; the measured values are saved. | |
Valve seat detection | The actuators have power-dependent seat detection. After calibration, the exact valve stroke is stored in the actuator's memory. | |
Foreign body detection | After clogging is detected, three attempts are made to get past clogging. If unsuccessful, the actuator continues to follow the positioning signal only within a limited range, and the LED blinks red. | |
Modbus RTU (RS-485), not galvanically isolated | Setpoint 0...100 % valve position Actual value 0...100 % for valve position Forced control Open / Close / Min / Max / Stop Setpoint monitoring and backup mode | SAX61../MO |