S21260-SRS Kollmorgen 12 Amp 4000 Watt Servo Drive
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
The S21260-SRS is a servo drive manufactured by Kollmorgen as part of the S200 Servo Drives series. It provides a continuous output current of 12 ARMS and continuous power of 4000 W with a nominal input voltage of 240 VAC and supports either single or three-phase input. The drive features a nominal bus voltage of 320 VDC and a peak output current of 30 ARMS.
Internal Product Review
The S21260-SRS is a Kollmorgen S200 servo drive designed for 240 VAC input and 1- or 3-phase operation. Current regulation feels exceptionally sharp with 12 ARMS continuous output and 30 ARMS peak output. A 3 kHz current loop bandwidth makes the unit a strong choice for responsive motion control.
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Product Description:
The S21260-SRS is an AC servo drive manufactured by Kollmorgen as part of the S200 Servo Drives series. It creates the power and control link between a motion controller and a brushless servo motor, converting line voltage into a regulated DC bus and pulse-width-modulated phase currents. In automated equipment the drive manages torque, speed, and position loops so that axes accelerate, decelerate, and hold commanded positions on schedule. Its compact rack-style housing mounts easily inside a control cabinet, and front-mounted terminals and feedback ports simplify field wiring.
Electrical ratings center on continuous operation. The drive supplies a continuous phase current of 12 ARMS, supporting loads up to 4000 W when powered from a three-phase source. The mains input is single- or three-phase at 240 VAC; it is rectified to a nominal DC bus of 320 VDC. If the bus voltage drops to 150 VDC, an undervoltage fault is issued to prevent loss of control. The unit accepts either 1- or 3-phase feeds without parameter changes, provided the connected motor has at least 0.9 mH of phase inductance to keep current ripple within limits. A shielded RJ-45 connector links the drive to the control network for real-time configuration and diagnostics.
Dynamic behavior is defined by a current loop bandwidth of 3 kHz, allowing the amplifier to correct torque errors rapidly, while the velocity loop can be tuned up to 800 Hz for accurate speed regulation. For short periods the output stage delivers 30 ARMS, enabling quick acceleration of inertial loads. During braking, regenerated energy is returned to the DC bus and limited at 397 VDC to protect internal components and supply wiring. These transient limits align with the continuous ratings to keep the drive stable under varying duty cycles.
