Danaher Motion / Kollmorgen Servostar 346 Servo Amplifier

The Kollmorgen Servostar 346 is a digital servo amplifier from the Servostar 300 series, engineered for precision motor control in industrial automation. It delivers continuous output current of 6 A RMS with peak capability of 12 A for up to 5 seconds, supported by an 8 kHz switching frequency and 1.2 kHz current controller bandwidth. The drive accepts three-phase AC input from 208–480 V ±10% at 50/60 Hz, with rated continuous input power of 5 kVA and maximum DC bus link voltage of 900 V.

Technical Specifications

Input Supply: 208–480 V AC (3-phase, ±10%), 50/60 Hz

Rated Input Power: 5 kVA continuous

Output Current: 6 A RMS continuous; 12 A peak (5 second duration)

DC Bus Voltage: Maximum 900 V

Switching Frequency: 8 kHz

Current Controller Bandwidth: 1.2 kHz

Switch Cycles: 30 per hour maximum

Enclosure Rating: IP20

Dimensions: 70 mm W × 246 mm H × 171 mm D (without connectors); <235 mm D (with connectors)

Cabinet Compatibility: 200 mm switchgear cabinets

Key Features

Supports EtherCAT, CANopen, and SERCOS communication protocols

Optional DeviceNet and PROFIBUS DP interfaces

14 digital inputs for motion task selection and execution

8 digital outputs for drive status reporting

Single analog input (ANIN1) and fault output relay

Remote enable and limit switch inputs

AS-Enable input for power stage inhibition

Encoder feedback compatibility: Resolver, Comcoder, SinCos, ROD426 emulation, and SSI (Gray/binary)

Available with integrated cooling fan (model suffix -FAN)

Parallel DC bus connection capability (up to 40 A total for Servostar 341–346 units)

Typical Applications Precision positioning, speed control, and motor drive applications in factory automation, machine tools, and industrial motion systems requiring multi-protocol communication and flexible encoder support.

Compatibility & Integration The Servostar 346 connects to distributed control networks via EtherCAT, CANopen, or SERCOS. Parallel connection of multiple units on the DC bus supports higher current demands. Cable requirements for parallel connections: unshielded single cores (2.5 mm²) with maximum length of 200 mm; shielded cables recommended for longer runs.