S31061-EC Kollmorgen
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The Kollmorgen S31061-EC is a servo drive from the S300 Servo Drives series. It operates with an input voltage range of 110 to 230 volts and has a peak output current of 20 Amps RMS. The drive features EtherCAT communication, an IP20 enclosure, and includes an internal brake resistor rated at 66 Ohm and 50 Watts.
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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.
Frequently Asked Questions about S31061-EC:
Q: What type of communication interface does the S31061-EC servo drive use?
A: The S31061-EC supports EtherCAT for its communication interface, allowing for real-time data transmission and control.
Q: What is the input voltage range required for the S31061-EC servo drive?
A: This drive operates with an input voltage range of 110 to 230 volts, ensuring compatibility with standard industrial power supplies.
Q: What is the peak output current available on the S31061-EC?
A: The S31061-EC offers a peak output current of 20 A RMS, which supports demanding servo motor applications.
Q: What are the specifications of the internal brake resistor in the S31061-EC?
A: This model is equipped with an internal brake resistor rated at 66 Ohms and 50 W of continuous power dissipation.
Q: Which safety feature is integrated into the S31061-EC servo drive?
A: The S31061-EC provides the safety function STO (Safe Torque Off) as a built-in protective feature.
