Product Description:

The 03.S4.D31-1290 is a servo controller produced by KEB in the S4 Combivert Servo Controllers series. It governs three-phase induction or synchronous motors within automated lines, converting the plant’s 200 V class supply into controlled output that positions axes and maintains programmed velocities. By integrating speed, current, and position loops, the unit links directly to drives so that machine tools, packaging stations, or material-handling cells receive real-time torque commands.

An analog command channel with 12-bit resolution allows fine reference scaling, while feedback or monitor values leave the unit through an 8-bit analog output. Torque is modulated every 64 µs by the current controller, and this fast cycle pairs with a 128 µs speed loop to keep motor response predictable. The integrated line filter is rated for 12 A at up to 250 V, matching the 200 V class, three-phase filter supply category and helping shield neighboring equipment from conducted noise. Housing design D fits inside compact IP20 cabinets and accepts three input phases through 1.5 mm² line conductors. Motor thermal stress stays within limits because the continuous output is 2.4 A, and the nominal shaft speed is 1500 rpm.

The control layer maintains shaft stability to within ±0.5 rpm, a figure reached by sampling the speed loop every 128 µs and compensating for load swings. During acceleration bursts, the inverter can deliver 9.7 A for 1000 ms, giving machines reserve torque without overpowering the 12 A filter stage. Normal mains draw remains at 2.6 A, coordinating with the specified line cross section to prevent conductor heating. The controller uses a D-style housing, and its three-phase architecture ensures balanced currents through all supply legs without external reactors.