Product Details

The Danaher Motion 401-34201-22, also named Kollmorgen DS120, belongs to the DSA SERCOS drive series and is a discontinued digital brushless servo amplifier for legacy Giddings & Lewis CNC and motion control platforms. This DS120 servo drive delivers precise torque, velocity and closed-loop position control for sinusoidal brushless AC servo motors. As a reliable SERCOS amplifier, it adopts single-phase 240 VAC input and integrates a built‑in shunt regulator for dynamic braking, supporting fast acceleration and deceleration under cyclic automation loads. This Giddings & Lewis servo drive communicates via SERCOS digital bus and works seamlessly with resolver and incremental encoder feedback; it is widely used to replace faulty drives on ageing machine tools and automated production lines, and stocked as genuine replacement spare part for industrial motion systems.

Basic Parameters

Brand: Danaher Motion (Kollmorgen / Giddings & Lewis)

Model: 401-34201-22, DS120

Series: DSA SERCOS

Type: Digital brushless servo amplifier

Input: Single‑phase 240 VAC

Continuous output power: 2.0 kW

Continuous output current: 10 Arms

Peak output current: 20 Arms

Built‑in shunt: 50 W continuous, 4.5 kW peak

Communication: SERCOS interface

Supported feedback: Resolver, incremental encoder

Supported motor: Sinusoidal brushless AC servo motor

Protection: Over‑current, over‑voltage, under‑voltage, over‑temperature, short circuit

Status: Obsolete original unit, available as new old stock or fully tested refurbished spare

Product type: Industrial SERCOS servo drive

Supported Functions

This servo amplifier receives high‑speed digital motion commands from the host CNC or motion controller over SERCOS bus and performs real‑time closed‑loop regulation for connected brushless servo motors. It supports electronic gearing, homing, jogging and continuous positioning, and processes position feedback to reduce axis tracking error. It continuously monitors internal operating status and stores fault logs for diagnosis, and can coordinate multi‑axis synchronous movement to run complex NC programs and automation sequences.

Core Functions

The compact panel‑mount form factor fits the original equipment layout without major cabinet modification. Its native SERCOS interface ensures stable digital communication with legacy Giddings & Lewis control racks. The integrated shunt provides reliable braking capability for high‑dynamic axes. All mounting dimensions and pin assignments follow factory original specifications, requiring only parameter tuning after installation, and it serves as direct drop‑in substitution for existing 401-34201-22 DS120 servo drives.

Hardware Specifications & Environmental Features

Mounting: Panel mounting inside control cabinet

Operating temperature: 0 °C to +55 °C

Storage temperature: -40 °C to +85 °C

Relative humidity: 5% – 90%, non‑condensing

Enclosure: Open‑frame industrial drive

Condition: Original Danaher Motion DS120 servo amplifier

Industry Applications: Applied in legacy petrochemical distributed control, old paper making production automation, material handling conveyor lines, packaging and textile machinery, water treatment remote signal collection and large conveyor remote I/O control racks.

Note: Confirm SERCOS master version, input power supply and matched servo motor feedback before ordering; this drive is discontinued by the manufacturer and parameter re‑tuning is mandatory after replacement.

This is from our current stock.

available stock.xlsx