Description
The KOLLMORGEN SERVOSTAR 446M-C S446M-CA is a SERVOSTAR 400 series master servo module designed for multi-axis industrial motion-control systems. The 446M is the 400 VAC-class master module and provides the shared DC-bus power architecture used with associated axis modules. Kollmorgen documentation specifies a 3-phase 230–400 VAC supply range, 320–560 VDC rated DC bus range, 6 A RMS rated output current, and 12 A RMS peak output current.
The unit is intended for machine automation, coordinated multi-axis motion, servo positioning, and industrial drive-system applications. The SERVOSTAR 400 platform supports motor feedback technologies including resolvers, encoders, HIPERFACE devices, and related feedback configurations depending on the system setup.

SERVOSTAR 446M-C S446M-CA
📋 Product Parameters
| Parameter | Specification |
|---|---|
| Brand | KOLLMORGEN |
| Model | S446M-CA |
| Product Name | SERVOSTAR 446M-C Servo Drive Master Module |
| Series | SERVOSTAR 400 |
| Module Type | Master Module |
| Rated Supply Voltage | 3 × 230–400 VAC |
| Rated DC Bus Voltage | 320–560 VDC |
| Rated Output Current | 6 A RMS |
| Peak Output Current | 12 A RMS |
| Maximum Installed Load | 12 kVA for S1 multi-axis operation |
| Output Stage Clock | 8 kHz |
| Auxiliary Supply | 24 VDC |
| Protection Class | IP20 |
| Dimensions | Approx. 267 × 100 × 240 mm, without connectors |
| Weight | Approx. 3 kg |
| Operating Temperature | 0–45°C |
| Storage Temperature | -25–55°C |
The electrical ratings and mechanical data above are based primarily on Kollmorgen SERVOSTAR 400 documentation; the S446M-CA variant is also identified by industrial product records with the same 6 A / 12 A current ratings and 267 × 100 × 240 mm enclosure dimensions.
⚙️ Key Features
- SERVOSTAR 400 multi-axis motion-control platform
- 400 VAC-class Master Module
- 6 A RMS continuous output current
- 12 A RMS peak output current
- 320–560 VDC DC-bus architecture
- 12 kVA maximum installed load for S1 operation
- 8 kHz output-stage switching frequency
- 24 VDC auxiliary control supply
- RS232 service/setup interface
- CANopen communication capability
- Supports multiple motor-feedback technologies depending on configuration
- Suitable for coordinated multi-axis servo applications
🔧 System Integration
The S446M-CA functions as the master module in a SERVOSTAR 400 multi-axis architecture. Unlike a standalone single-axis drive, the master module is designed to work with associated axis modules through the shared DC bus. This architecture allows multiple servo axes to be integrated into a coordinated machine-motion system.
When replacing an existing unit, verify the complete S446M-CA designation, voltage class, expansion/communication options, firmware or configuration requirements, connectors, and the connected axis modules. The Kollmorgen part-number documentation shows that SERVOSTAR 400 variants use coding for voltage, current, module function, and optional communication expansions.
🔎 Product Keywords
Kollmorgen S446M-CA, SERVOSTAR 446M-C, SERVOSTAR 400, S446MCA, S446M-CA Servo Drive, Kollmorgen Servo Drive, Kollmorgen Master Module, SERVOSTAR Master Module, 400 VAC Servo Drive, Multi Axis Servo Drive, Industrial Motion Control, Servo Amplifier, CNC Servo Drive, Kollmorgen S400, S400 Motion Controller.
❓ FAQ
Q1. What is the KOLLMORGEN S446M-CA?
It is a SERVOSTAR 400 series Master Module for multi-axis servo and motion-control systems.
Q2. What is its rated output current?
The 446M is rated at 6 A RMS, with a peak output current of 12 A RMS.
Q3. What input voltage does it use?
The 400 VAC-class 446M supports 3 × 230–400 VAC input.
Q4. Is S446M-CA a standalone single-axis drive?
It is a Master Module intended for the SERVOSTAR 400 multi-axis architecture and shared DC-bus arrangement.
Q5. What should be checked before replacement?
Verify the complete S446M-CA model, voltage class, expansion options, connectors, firmware/configuration, and compatibility with the existing SERVOSTAR 400 axis modules.
🔗 10 Related KOLLMORGEN Models
- KOLLMORGEN SERVOSTAR 403M
- KOLLMORGEN SERVOSTAR 406M
- KOLLMORGEN SERVOSTAR 443M
- KOLLMORGEN SERVOSTAR 446M
- KOLLMORGEN SERVOSTAR 403A
- KOLLMORGEN SERVOSTAR 406A
- KOLLMORGEN S4036M
- KOLLMORGEN S4066M
- KOLLMORGEN S406AM-CA
- KOLLMORGEN SERVOSTAR 400 Axis Module

