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Home › Selection & Replacement › GM401.012A102 and GM401.A12A102 SSI Encoder 1:1 Replacement

GM401.012A102 and GM401.A12A102 SSI Encoder 1:1 Replacement

EncoderWorks Team
9 monthsago

We provide a precise SSI encoder 1:1 replacement solution for the GM401.012A102 and GM401.A12A102 models, intended for direct integration into existing absolute multiturn motion control systems. This replacement is designed to mirror the original encoder’s electrical interface, SSI timing, and functional logic, allowing installation without changes to controller programs, parameter settings, or wiring layouts.

The encoder delivers absolute multiturn position feedback via a Synchronous Serial Interface, combining high singleturn resolution with reliable multiturn counting. Stable data transmission and consistent code behavior ensure accurate position information even in applications with rapid acceleration, frequent direction changes, or continuous operation. The supported code formats and sampling characteristics enable smooth communication with standard industrial controllers and drives.

GM401.012A102 and GM401.A12A102 SSI Encoder 1:1 Replacement-EncoderWorks
GM401.012A102 and GM401.A12A102 SSI Encoder 1:1 Replacement-EncoderWorks

Mechanically, the encoder conforms to established industrial mounting standards, enabling straightforward installation on existing shafts and flanges. The internal design incorporates continuous self-diagnostic monitoring, including supervision of code continuity, signal frequency limits, and internal electronic status. These diagnostic capabilities support early fault detection and contribute to improved system uptime.

This 1:1 replacement solution is well suited for servo systems, automated machinery, and industrial positioning applications where precise absolute feedback, operational stability, and long-term reliability 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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Email: encoderworks@outlook.com

EncoderWorks Technical Support

Contact Support

WeChat: +86 150 5045 0799 (WhatsApp)

Email: encoderworks@outlook.com

GM401.010A102 and GM401.A10A102 SSI Encoder 1:1 Replacement

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