Product Overview
The Kollmorgen ServoStar 403M-P is a fully digital, single-axis servo amplifier from the SERVOSTAR 400 platform, a multi-axis drive family that Kollmorgen designed to deliver maximum performance in minimum cabinet space at minimum system cost. Identified in the trade by its full ordering code Kollmorgen S403M-PB, this unit is a 3 A RMS continuous, 9 A peak master module rated for the 230 V mains class, and it is intended to drive brushless synchronous servo motors such as the Kollmorgen AKM and Goldline series in precision motion applications.The designation carries precise meaning. “M” marks the unit as a master module, which means the rectifier, input mains filter, inrush circuitry and regenerative braking circuit are all built into the housing, so the Kollmorgen ServoStar 403M-P connects directly to the mains and can operate stand-alone with no separate DC bus power supply. The “P” suffix identifies the PROFIBUS interface variant within the SERVOSTAR 400 range, alongside the CANopen, SERCOS and EtherCAT variants.Inside the drive, a digital signal processor closes the current, velocity and position loops, with a current controller bandwidth above 1.2 kHz and an 8 kHz output stage clock frequency. Resolver, sine-cosine and incremental encoder feedback are all accepted, and functions such as electronic gearing, electronic camming, position capture and adaptive vibration suppression are executed in the drive itself. In a machine architecture, the Kollmorgen S403M-PB acts as both power hub and communication gateway: one master can feed up to seven additional axis modules, so an eight-axis machine needs only a single mains connection, a single enable circuit and a single PC programming link.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | ServoStar 403M-P (order code S403M-PB) |
| Manufacturer | Kollmorgen (Regal Rexnord group) |
| Product Type | Digital servo amplifier / single-axis master module |
| Series | SERVOSTAR 400 (S400) |
| Rated Supply Voltage | 1 × 115 V AC to 3 × 230 V AC (+10 % / −15 %), 50/60 Hz |
| Rated DC Link Voltage | 160 – 320 V DC |
| Rated Output Current | 3 A RMS (±3 %, at 8 kHz) |
| Peak Output Current | 9 A RMS (up to approx. 5 s) |
| Installed Power (S1) | 7 kVA |
| Regenerative Circuit | 40 W internal continuous; up to 250 W with external resistor |
| Switching Frequency | 8 kHz (switchable to 16 kHz with power derating) |
| Current Controller Bandwidth | > 1.2 kHz |
| Control Modes | Torque, velocity, position (step/direction, electronic gearing, camming) |
| Feedback Interfaces | Resolver (SubD 9), incremental encoder (SubD 15), Sin/Cos 1 Vpp, EnDat, Hiperface, BiSS |
| Command Interface | Analog ±10 V differential (14-bit), digital I/O, PROFIBUS DP |
| Communication | RS-232 (PC/setup), PROFIBUS DP, internal CANopen for axis linking |
| Digital I/O | Multiple programmable inputs and outputs; BTB/RTO relay contact |
| Connections | Combicon spring terminals for control and power, SubD for feedback and PC |
| Dimensions (H × W × D) | Approx. 230 × 100 × 240 mm (without connectors) |
| Weight | Approx. 3 kg |
| Protection Rating | IP20, cabinet installation, pollution degree 2 |
| Operating Temperature | 0 °C to +45 °C, derated operation up to +55 °C |
| Cooling | Convection with add-on ventilation option |
| Configuration Software | Kollmorgen WorkBench / SERVOSTAR setup software |
Main Features and Advantages
True master module with integrated power section: The Kollmorgen ServoStar 403M-P accepts anything from single-phase 115 V AC to three-phase 230 V AC on the same terminals and contains the rectifier, mains filter and regen chopper in one housing. Machine builders therefore eliminate a separate power supply module, a DC bus bar and a bundle of interconnecting cables, which is why the platform fits comfortably into 300 mm deep switchgear cabinets. The internal 40 W regen resistor handles routine deceleration energy, and an external resistor of up to 250 W continuous can be added for high-inertia loads.Multi-axis scalability from a single point of supply: Because power and regen are centralised in the master, the Kollmorgen S403M-PB can act as the supply and communication head for a group of up to seven axis modules. In an eight-axis machine this collapses the installation to one mains connection, one enable circuit, one BTB contact chain and one PC connection, cutting both hardware cost and commissioning time.Feedback flexibility and encoder emulation: The Kollmorgen ServoStar 403M-P supports resolver, high-resolution sine-cosine encoders with EnDat, Hiperface or BiSS protocols, and standard 5 V incremental encoders. An ROD/SSI-compatible encoder emulation output lets the drive feed position back to a PLC or motion controller that expects a conventional encoder signal, which simplifies retrofits into machines that were never designed around a digital drive.Advanced tuning and vibration handling: Built-in inertia identification, notch filtering, model-following control and adaptive vibration suppression allow the Kollmorgen S403M-PB to compensate for mechanical resonances in belts, long ball screws and lightweight gantries. Setup is performed through the Windows-based Kollmorgen software, which offers online optimisation, integrated oscilloscope traces and Bode plots so that loop gains can be verified while the axis is running.Diagnostics and protection for industrial duty: A front-panel LED display and keypad on the master give immediate status without a PC, while comprehensive monitoring covers overcurrent, overvoltage, undervoltage, overtemperature, short circuit and feedback loss. Overload protection acts at 130 % of full load current, and the fault history is retrievable over the serial interface, which shortens troubleshooting during a production stoppage.
