AUMA SA/SAR Series Electric Actuators: Wiring, Limit & Torque Setting and Feedback Calibration

The AUMA SA series is the multi-turn electric actuator from Germany's AUMA; the SAR series is the part-turn (quarter-turn) version. Both use non-intrusive commissioning — all parameters are set from the control panel keys. Based on the AUMA SA multi-turn actuator manual, this article covers on-off terminal wiring, a six-step commissioning procedure and common fault remedies.

On-Off Type Terminal Wiring

Terminal	Function	Description
L1、L2、L3、PE	Three-phase supply + earth	380V three-phase
2、11	Remote close command	Internally powered, remote dry contact
3、11	Remote open command	Internally powered, remote dry contact
6、7	Valve fully closed	Position feedback, dry contact
6、8	Valve fully open	Position feedback, dry contact
6、10	Remote signal	Remote signal

Commissioning Procedure

Step 1: Preparation

• Use the handwheel to place the valve around 50%
• Verify wiring and energize
• Switch the actuator to local control mode

Step 2: Confirm phase sequence

• Jog the open/close button and stop immediately; observe the rotation direction
• If reversed, de-energize and swap any two supply phases

Step 3: Enter the menu

• Press the C key to enter the parameter menu
• Enter password 0000 (factory default) and confirm
• The menu shows the list of setting items

Step 4: Limit switch setting

Close limit:

• Run the actuator to fully closed
• Locate the limit-switch adjuster shaft A (usually marked on the end cover or side cover)
• Rotate shaft A with the special tool until the closing-limit cam just trips the travel switch
• Confirm and save the close limit in the menu

Open limit:

• Run the actuator to fully open and adjust the opening-limit switch the same way
• Save and exit the menu

Step 5: Torque switch adjustment

• Torque switches are usually mechanical, inside the actuator
• Open the torque-switch cover and locate the open and close torque adjusting screws
• Set the torque values per the dial; the close setting is generally slightly higher than open
• Replace the cover and verify over the full stroke

Step 6: Feedback calibration

• Set a multimeter to mA range and insert it in the 4–20 mA feedback loop
• Run the actuator fully closed; adjust the zero potentiometer until feedback reads 4 mA
• Run fully open; adjust the span potentiometer until feedback reads 20 mA
• Stroke 2–3 times to confirm both limits and feedback are correct

Common Faults and Remedies

Fault	Possible cause	Remedy
Cannot enter menu	Wrong password; not in local mode	Verify password 0000; switch to local mode
Limit switch does not actuate	Adjuster shaft A wrongly positioned	Readjust the limit cam position
Motor thermal trip	Excessive torque; frequent starts	Check valve mechanically; reduce duty frequency
Feedback drift	Ageing or loose potentiometer	Replace potentiometer; recalibrate 4–20 mA

Related reading: Universal Electric Actuator Wiring & Commissioning Guide; see also the AUMA brand column.