GM401.Z21 Wind Turbine Encoder Custom Replacement Solution

For the GM401.Z21 encoder, we deliver a customized replacement solution developed specifically for wind turbine applications. This solution is based on a 1:1 non-standard customization process, ensuring perfect mechanical and electrical compatibility with the original encoder. The manufacturing period is controlled within 10–15 working days, significantly shortening lead times compared to typical imports. This allows operators to minimize turbine downtime, improve maintenance efficiency, and avoid costly operational disruptions. By choosing our replacement service, customers gain a dependable alternative that offers consistent quality, short delivery cycles, and reliable performance.

The GM401.Z21 replacement encoder reflects the robust design principles of the Baumer GM400 series, optimized for accurate and stable operation in wind power generation systems. As a multiturn encoder with SSI communication, it employs an optical sensing method that ensures long-term accuracy and durability. The encoder supports up to 14-bit resolution per revolution for singleturn feedback and 16-bit resolution for multiturn capability. With a clamping flange for easy installation, the device also features electronic zero-point adjustment to simplify commissioning. The encoder includes a counting direction input and can be configured with additional incremental outputs, offering versatile signal options for integration into control systems. Its design ensures maximum resistance to magnetic fields, providing stable operation in environments with strong electromagnetic influences such as wind turbine nacelles, power generators, and heavy industrial machinery. This combination of features guarantees high precision, operational reliability, and extended service life.

Replacement model real product photo.

GM401.Z21 Wind Turbine Encoder Custom Replacement Solution-LinkChina
GM401.Z21 Wind Turbine Encoder Custom Replacement Solution-LinkChina

Technical Data

Electrical Ratings

ParameterValues
Voltage supply10…30 VDC5 VDC ±10 %
Reverse polarity protectionYes (10…30 VDC) / No (5 VDC)
Consumption w/o load≤50 mA (24 VDC)≤80 mA (5 VDC)
Initializing time typ.20 ms after power on
InterfaceSSIIncremental A 90° B (optional)
FunctionMultiturn
Steps per revolution≤16384 / 14 bit
Number of revolutions≤65536 / 16 bit
Absolute accuracy±0.025°
Sensing methodOptical
CodeGray or binary
Code sequenceCW/CCW coded by connection
InputsSSI clock; Control signals UP/DOWN inv. and zero; SSI data outputs RS422
Output stagesDiagnostic: 1024, 2048 pulses + invertedIncremental output: 512, 1024, 2048 push-pull
Interference immunityEN 61000-6-2
Emitted interferenceEN 61000-6-4
Diagnostic functionSelf-diagnosis; Multiturn sensing
ApprovalUL approval / E63076

Mechanical Design

ParameterValues
Size (flange)∅58 mm
Optional
Stainless steel design
Corrosion protection for offshore applications
Parameter CategoryValues
Shaft typeα10 design solid shaft
FlangeClamping flange
Protection EN 60529IP 54 (without shaft seal)IP 65 (with shaft seal)
Operating speed≤10000 rpm (mechanical)≤6000 rpm (electric)
Angular acceleration≤25000 rad/s² (UB = 0 VDC)≤25000 rad/s² (UB = 10…30 VDC, 5 VDC)
Starting torque≤0.015 Nm (+25 °C, IP 54)≤0.03 Nm (+25 °C, IP 65)
Rotor moment of inertia20 g·cm²
Admitted shaft load≤20 N axial≤40 N radial
MaterialHousing: aluminiumFlange: aluminium
Operating temperature-25…+85 °C-40…+85 °C (optional)
Relative humidity95 % non-condensing
ResistanceEN 60068-2-6Vibration ≤0.75 mm - 10 - 58 Hz, 10 g - 58 - 2000 HzEN 60068-2-27Shock 200 g, 6 ms
Weight approx.400 g
ConnectionConnector M23, 12-pinConnector M12, 8-pinCable 1 m
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