一般小型（低档）PLC具有逻辑运算、定时、计数等功能，对于只需要开关量控制的设备都可满足。对于以开关量控制为主，带少量模拟量控制的系统，可选用能带A／D和D／A单元。具有加减算术运算。数据传送功能的增强型低档PLC。
对于控制较复杂，要求实现PID运算、闭环控制、通信联网等功能，可视控制规模大小及复杂程度，选用中档或**PLC。但是中、**PLC价格较贵，一般大型机主要用于大规模过程控制和集散控制系统等场合。
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SEW EURODRIVE SF67D16DT80K4 GEAR BOX, RATIO 190.11, TORQUE 1940 IN LB,
SEW- EURODRIVE ST47DT90S4 INPUT 1740 RPM OUTPUT 144 RPM
SEW EURODRIVE VECTOR RF17 DT71D4 GEARMOTOR KW 0.37
SEW EURODRIVE VECTOR WF30 DRS71M4 GEARMOTOR, KW 0.55
SEW EURODRIVE?? R77AM215 GEAR BOX, 7.74 RATIO, 2700 RPM, 1.0 HP,
SEW EURODRIVE?? R77AM215 GEAR BOX, 7.74 RATIO, 2700 RPM, 1.0 HP,
SEW GEAR REDUCER R47AM104
SEW-EURDRIVE DFT71C4BMCO5MF .33 HP GEAR MOTOR
SEW-EURDRIVE DRS7IM4BIHFU 230YY / 460 Y REDUCER
SEW-EURDRIVE R37DT9OL4BMG2MRZ-02141
SEW-EURDRIVE R60 RATIO 19.56 REDUCER
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SEW-EURDRIVE SF47DR57154 RATIO 17.62 GEAR MOTOR
SEW-EURODRIVE 0.37 KW VECTOR GEARMOTOR RF17 DT71D4, 277/480 VOLT
SEW-EURODRIVE DFT71K2-KS GEARMOTOR, RATIO 5.09, .33 HP, 3100 RPM, 230/460 VOLT
SEW-EURODRIVE DFT71K2-KS GEARMOTOR, RATIO 5.09, .33 HP, 3100 RPM, 230/460 VOLT
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SEW-EURODRIVE K46DT71K4 GEAR MOTOR, RATIO 19.01, 0.25 HP, 1700 RPM
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SEW-EURODRIVE R40 GEARMOTOR, RATIO 12.32, .33 HP, 1656-138.00 RPM
SEW-EURODRIVE R60 GEARMOTOR, RATIO 19.56, HP .50, 230/460 VOLT
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SEW-EURODRIVE S57DT80N4 GEARMOTOR, RATIO 16.47, 1 HP, 1700 RPM, 230/460 V
