西門子SQM50.481A2電動執行機構，雙向旋轉；最大轉矩可達40NM，具有齒輪離合功能；運行時間10S-90S；內部及外部位置指示單軸或雙軸輸出，且有多種規格驅動軸可選 
型號：

 SQM50.481A2 SQM50.483A2 SQM50.381A2Z3 SQM50.681A2    SQM54.580A2 SQM56.687A2 SQM56.687A2Z3      SQN30.131A2700 SQN30.401A2730 SQN31.101A2700 SQN31.111A2700    SQN31.251A2730 SQN31.4O1A2700 SQN31.4O1A2720 SQN31.4O1A2730    SQN30.402A2760 SQN31.402A2700 SQN31.102A2700 SQN70.244A20    SQN70.454A20 SQN70.664A20 SQN70.664A23 SQN70.224A20    SQN71.294A26 SQN71.424A20 SQN71.454A20 SQN71.664A20    SQN75.294A21 SQN75.424A21 SQN75.444A21 SQN75.694A21    SQN74.444A21 SQN74.694A21 SQN74.864A21 SQN90.140B2799    SQN90.204A2799 SQM10.15502 SQM10.16502 SQM10.17502    SQM45.291A9 SQM45.295A9 SQM48.497A9 SQM50.381A2    SQM53.481A2 SQM53.581A2 SQM53.489A2 SQM54.482A2    SQN31.121A2700 SQN31.4O1A2760 SQN70.264A20 SQM10.15562