Product Overview

The Kollmorgen 403M-P (also designated as S403M-PB) is a compact, high-performance digital servo drive from the renowned ServoStar 400 series, engineered to provide precise motion control for three-phase brushless AC servo motors . As a single-axis “Master” module within the S400 family, the Kollmorgen 403M-P integrates the rectifier, input filter, and braking circuitry directly into its housing, allowing for direct connection to standard three-phase mains without requiring a separate DC bus power supply . This all-in-one design makes the Kollmorgen 403M-P an exceptionally space-efficient solution for machine builders and system integrators.

The Kollmorgen 403M-P functions as the intelligent interface between a motion controller or PLC and the servo motor, converting command signals into precisely modulated three-phase current to drive motors such as Kollmorgen’s AKM and Goldline series . With its advanced digital signal processor (DSP), the Kollmorgen 403M-P executes sophisticated control algorithms including electronic gearing, electronic camming, and adaptive vibration suppression, delivering the smooth, quiet operation essential for high-speed, high-accuracy applications . The “PB” suffix distinguishes this variant as one equipped with an internal indexer (positioning module), capable of storing and executing up to eight pre-programmed motion tasks triggered via simple digital I/O—a feature that simplifies system architecture and reduces the burden on the primary controller . As a legacy model now superseded by the AKD series, the Kollmorgen 403M-P remains a critical spare for maintaining countless industrial machines worldwide .

 

Technical Specifications

Parameter Name	Parameter Value
Product Model	Kollmorgen 403M-P (Order Code: S403M-PB)
Manufacturer	Kollmorgen (Regal Rexnord Group)
Product Type	Digital Servo Drive / Single-Axis Master Amplifier
Series	ServoStar 400 (S400)
Input Voltage	1 x 115V AC to 3 x 230V AC +10% / -15%, 50/60Hz
DC Bus Voltage	160 – 320 V DC (from rectified AC input)
Rated Output Current	3.0 A RMS (continuous)
Peak Output Current	9.0 A RMS (up to 3-5 seconds, 300% overload)
Control Modes	Torque Control, Velocity Control, Position Control (Step/Direction, Electronic Gearing)
Feedback Interfaces	Resolver, Sin/Cos Encoder (EnDat 2.1/Hiperface/BiSS), 5V Incremental Encoder (TTL)
Standard Communication	RS-232 (Configuration/Diagnostics)
Fieldbus Options	PROFIBUS DP (S403M-PB variant), SERCOS, CANopen, EtherCAT (via plug-in cards)
Digital I/O	Multiple programmable inputs/outputs for task triggering and status feedback
Protection Functions	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Short Circuit, Feedback Loss
Switching Frequency	8 kHz (configurable to 16 kHz with derating)
Operating Temperature	0°C to +55°C (derating above 40°C)
Storage Temperature	-40°C to +85°C
Protection Rating	IP20 (Cabinet Installation Only)
Cooling Method	Forced Air (Internal Fan)
Safety Features	STO (Safe Torque Off) via external safety relay; additional safety notes apply per S400 documentation
Configuration Software	Kollmorgen WorkBench (free)
Lifecycle Status	Discontinued (New Surplus / Aftermarket Supply)

 

Main Features and Advantages

All-in-one design and flexible power input: The Kollmorgen 403M-P distinguishes itself with an integrated power supply design that accepts a remarkably wide input voltage range—from single-phase 115V AC to three-phase 230V AC . This eliminates the need for separate power supply modules and simplifies cabinet layout, reducing both component count and wiring complexity. As a Master module, the Kollmorgen 403M-P can serve as the power and communication hub for up to 8 additional axis modules in a multi-axis system, making it an economical choice for synchronized motion applications . The integrated 40W continuous braking resistor (with provision for external resistors up to 250W continuous) effectively manages regenerative energy, protecting the DC bus from overvoltage during deceleration .

Advanced control algorithms for superior motion quality: The Kollmorgen 403M-P leverages high-speed digital signal processing with current loop update rates of 62.5 µs and position loop rates of 250 µs, delivering exceptional dynamic response and positioning accuracy . The drive features adaptive vibration suppression and model-following control algorithms that automatically compensate for mechanical resonances common in long transmission systems such as conveyor belts or printing press rollers . This capability significantly reduces settling time and improves surface finish in machining applications. The Kollmorgen 403M-P also supports advanced functions including electronic gear, electronic cam, position capture and compare, and high-speed registration, making it highly versatile across diverse applications .

Flexible feedback and communication options: The Kollmorgen 403M-P supports a wide range of feedback devices including resolvers, incremental encoders, and absolute encoders (EnDat, Hiperface, BiSS), ensuring compatibility with virtually any servo motor configuration . The modular communication architecture allows users to tailor the drive to their specific control network—choosing from PROFIBUS, SERCOS, CANopen, EtherCAT, or PROFINET via plug-in expansion cards . The S403M-PB variant specifically includes PROFIBUS DP capability, which is critical for seamless integration with Siemens PLC systems, eliminating the need for additional gateways and protocol conversions . For standalone or simple applications, the built-in indexer of the S403M-PB allows direct I/O triggering of pre-stored motion profiles, reducing reliance on external controllers .

Comprehensive diagnostics and ease of use: The Kollmorgen 403M-P is configured and tuned using Kollmorgen’s user-friendly WorkBench software, which offers powerful autotuning routines that quickly identify motor and mechanical parameters and automatically set optimal PID gains . The software also provides extensive diagnostic tools including oscilloscope functionality for real-time signal analysis, event logging, and detailed fault reporting—features that dramatically reduce commissioning time and simplify field troubleshooting . The Kollmorgen 403M-P maintains statistical logs of motor operating hours, starts, and fault history, enabling predictive maintenance planning and helping operators identify developing issues before they cause unplanned downtime.