Product Description:

The S31061-EC is a compact drive module produced by Kollmorgen and supplied within the S300 Servo Drives series. Designed to command synchronous or induction servo motors, this unit converts line power into regulated three-phase output for precise position, velocity, and torque control in industrial automation cells. By hosting fieldbus and safety functions directly on the drive, it supports decentralized machine architectures where axis electronics are mounted inside the main control cabinet. This layout helps reduce cabinet wiring and keeps power conversion, control, and protective functions in one module for compact motion systems.

The drive accepts a single- or three-phase supply of 110–230 V and rectifies it to a DC link that can rise to 450 VDC during energy recovery. An EtherCAT interface provides cyclic setpoints to the current regulators, and the power stage can source a peak of 20 A RMS for acceleration events while its continuous rating is 10 A RMS. Pulse-width modulation is executed at 8 kHz, balancing dynamic response with switching losses. With a nominal input requirement of 4 kVA, the unit dissipates heat through its internal thermal path and requires a minimum motor inductance of 1.9 mH for 3 × 230 V operation to keep current ripple within design margins. This arrangement supports stable motor control during starting, running, and deceleration.

During regenerative braking, the chopper activates at 400 V, redirecting surplus energy into an internal 66 Ω resistor that can absorb 50 W continuously or 3 kW in short pulses. The hardware opens the mains contactor if the link reaches 455 VDC. Drive safety is handled by the dual-channel STO (Safe Torque Off) circuit, which removes gate-drive energy to the IGBTs. The housing carries an IP20 rating, so the drive must be installed inside a control cabinet. Cabinet installation helps protect the electronics from accidental contact and supports controlled ventilation around the module.