Rexroth Indramat W100N-HS12-01-FW HDS03.1 Servo Drive Unit

Module Feature

W100N-HS12-01-FW belongs to Rexroth Indramat HDS03.1 modular servo drive family. Rated output current 100A, HS12 denotes hardware revision, FW stands for loaded firmware package. It is designed for DC bus power supply, equipped with IGBT power stage, matched with digital control card and SERCOS fiber communication interface. Supports field-oriented vector control, resolver / incremental encoder feedback, high dynamic torque and speed response. This is discontinued legacy Indramat drive, widely stocked as emergency maintenance spare for old CNC, paper machine, metal forming and textile high-speed motion racks.

Working principleDC bus voltage enters the power unit; control board outputs PWM gate pulses to IGBT module to generate adjustable three-phase AC for servo motor. Vector algorithm separates flux and torque control loop, position closed-loop is realized via encoder/resolver feedback. SERCOS fiber bus receives synchronous commands from upper controller. Built-in hardware protection monitors overcurrent, bus voltage, temperature and encoder signal, latches fault and shuts down output when abnormal.

Onboard componentsIGBT power module, DC bus capacitor bank, Hall current sensors, gate drive circuit, cooling fan, backplane control connector, SERCOS optical transceiver, status LED array and coated metal chassis.

LED indicatorsFront LED array shows power ready, running status, fault alarm; commissioning panel displays parameter values and fault codes.

Hardware self‑diagnosisBuilt-in supervision detects overcurrent, DC bus over/under voltage, heatsink overtemperature, encoder loss, SERCOS link break and control board communication failure. Configuration and fault diagnosis are completed by Indramat DDS software.

Programming softwareDDS, used for motor parameter auto-identification, loop tuning, SERCOS node setup, fault waveform and history reading.

Electrical & Process Parameters

Model:W100N-HS12-01-FW Brand:Rexroth Indramat Device type:HDS03.1 modular servo power drive Function:High precision speed, torque and position control for high-power AC servo motor

Mechanical & StructureMounting:Rack mount inside control cabinet Protection class:IP20 Housing:Metal air-cooled servo power unit

EnvironmentalOperating temperature:0℃ ~ +45℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing

Certification:CE, UL Status:Obsolete original Indramat motion spare

InstallationCut off DC bus supply and fully discharge capacitors before replacement. Match correct control card and firmware, verify SERCOS fiber wiring, check encoder shield cable, download drive parameter file, test no-load and synchronous running after commissioning.

InterfaceDC bus terminal, three-phase motor output terminal, 24VDC auxiliary control terminal, SERCOS optical fiber port, encoder feedback port, backplane control card connector.

DiagnosticOvercurrent fault: IGBT breakdown, motor cable short circuit, improper gain. Encoder fault: Cable disconnection, wiring reversal, encoder damage. SERCOS communication trouble: Fiber bending, missing terminator, node address conflict. Overtemperature: Fan blockage, dust accumulation, poor cabinet ventilation.

Product BriefW100N-HS12-01-FW servo drive, Rexroth Indramat HDS03.1 100A legacy SERCOS servo spare for CNC machine tool and printing high dynamic motion cabinet replacement.