Product Description:

The S406AM-CA-022 is a compact drive unit manufactured by Kollmorgen within the S400 Servo Drives series. Installed between the plant’s AC mains and a synchronous or induction motor, the drive modulates voltage and frequency so motion controllers can command precise velocity, position, and torque profiles. With a 100 mm-wide housing, a depth of 240 mm, and a mass of 3 kg, the module fits tightly packed control cabinets used in automated packaging, material-handling, and assembly lines. It acts as the master module in a multi-axis stack, coordinating operation with the connected axis modules.

The control section accepts analog reference signals that are processed through a 14-bit converter, providing high-resolution speed or torque commands. Current loops are updated at a rate of 8 kHz, limiting velocity ripple on demanding axes. Dynamic events such as rapid indexing moves can be supplied with up to 12 A rms of peak output before the drive reduces the current. Continuous production duty is supported at 6 A rms, a rating that guides heat sink sizing and cable selection. Protective circuitry disconnects the power stage if the DC bus rises above 750 V, preventing damage from regenerative overvoltage during emergency stops.

The permissible load inductance ranges from a minimum of 7.5 mH to a maximum of 40 mH, helping the current regulators remain stable across the full operating voltage. The output current has a form factor of 1.01, indicating near-sinusoidal conduction that minimizes motor heating and acoustic noise compared with square-wave drives. Even while idle, the logic circuits and gate drivers draw 15 W, which should be included in panel thermal calculations along with the 60 W dissipation at rated current. Four optically isolated digital inputs and two transistor outputs provide handshake signals for interlocks, drive-enable commands, and fault annunciation without requiring additional I/O modules.