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Home › Selection & Replacement › GM401.0101102 and GM401.A101102 SSI Encoder 1:1 Replacement

GM401.0101102 and GM401.A101102 SSI Encoder 1:1 Replacement

EncoderWorks Team
9 monthsago

We provide a reliable SSI encoder 1:1 replacement solution for the GM401.0101102 and GM401.A101102 models, developed for direct substitution in absolute multiturn positioning systems. This replacement is engineered to replicate the original encoder’s electrical behavior, SSI communication timing, and functional logic, allowing installation without changes to PLC programs, drive parameters, or wiring concepts.

The encoder delivers absolute multiturn position feedback via a Synchronous Serial Interface, combining precise singleturn measurement with dependable multiturn tracking. Stable data transmission and consistent signal timing ensure accurate position information even in applications with frequent speed variations or continuous operation. The supported coding structure allows smooth integration with standard industrial controllers and motion platforms.

GM401.0101102 and GM401.A101102 SSI Encoder 1:1 Replacement-EncoderWorks
GM401.0101102 and GM401.A101102 SSI Encoder 1:1 Replacement-EncoderWorks

Mechanically, the encoder is designed around established industrial mounting standards, enabling straightforward installation on existing shafts and flanges. Its internal architecture incorporates continuous self-diagnostic monitoring, including checks for code stability, signal frequency limits, and internal electronic status. These features improve operational reliability and help identify potential issues before they impact system performance.

This 1:1 replacement encoder is well suited for servo drives, automated machinery, and industrial positioning systems where accurate absolute feedback and long-term stability are essential.

Technical data

ParameterValue
Supply voltage10...30 VDC with reverse voltage protection
Current consumptionMax. 50 mA (w/o load) for 24 VDC
SSI pulse frequency62.5 kHz up to 1.5 MHz
Mono-flop time20 μs
Pulse spaceMin. 25 μs
Code switching speed for sampling800 kHz
Deviation of sampling measuring step0.025 degree at 400 kHz
0.05 degree at 800 kHz
Electric connectorThe electric connector must not be plugged on or removed whilst under voltage.
ParameterValue
RPM valuemechanical: Max. 10,000 RPM
electrical: Max. 6,000 RPM
Anlauf-Drehmomentw/o seal (IP54): < 0.010 Nm
with seal (IP65): < 0.015 Nm
Shaft loadingaxial: < 20 N
radial: < 40 N
Inertia torque2 x 10⁻⁶ kgm²
MaterialHousing: Steel
Flange: Aluminium
WeightApproximately 400 g
ParameterValue
Ambient temperature-20...+60 °C
Storage temperature-20...+70 °C
Protection toShaft w/o seal: IP 54
Shaft with seal: IP 65
Relative humidityMax. 95 %, non-condensing
Endurance - VibrationIEC 68 Section 2 - 6 (≤100 m/s² / 16-2000 Hz)
Endurance - ShockIEC 68 Section 2 - 27 (≤2000 m/s² / 6 ms)
Interference immunityEN 50082-2
EN 61000-4 - 2 to 4 Severity grade 3
Emmited interferenceEN 50081-2
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EncoderWorks Technical Support

Contact Support

WeChat: +86 150 5045 0799 (WhatsApp)

Email: encoderworks@outlook.com

GM401.020A102 and GM401.A20A102 SSI Encoder 1:1 Replacement

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WeChat:+86 150 5045 0799 ( WhatsApp) Email:encoderworks@outlook.com