We provide a precise SSI encoder 1:1 replacement solution for the GM400.0201102 and GM400.A201102 models, developed for direct substitution in absolute multiturn positioning systems. The replacement is engineered to mirror the original electrical behavior, SSI timing, and data structure, enabling installation without changes to PLC programs, drive parameters, or interface configuration.
This solution delivers high-resolution absolute position feedback using an SSI interface, combining accurate singleturn measurement with reliable multiturn tracking. Stable code transmission and consistent sampling behavior ensure dependable position data even in applications with rapid speed changes or continuous operation. Support for standard coding formats allows seamless communication with existing control architectures.
Mechanically, the encoder is designed around established industrial mounting standards, allowing straightforward installation on existing shafts and flanges. The internal architecture emphasizes operational reliability, incorporating continuous self-diagnostic monitoring such as code consistency checks, signal frequency supervision, and internal electronics status verification. These functions help detect abnormal conditions early and support predictive maintenance strategies.
This 1:1 replacement is well suited for servo-driven machinery, automated production equipment, and industrial positioning systems where absolute feedback accuracy, system stability, and long service life are essential to overall machine performance.
Technical data
| Parameter | Value |
| Supply voltage | 10...30 VDC with reverse voltage protection |
| Current consumption | Max. 50 mA (w/o load) for 24 VDC |
| SSI pulse frequency | 62.5 kHz up to 1.5 MHz |
| Mono-flop time | 20 μs |
| Pulse space | Min. 25 μs |
| Code switching speed for sampling | 800 kHz |
| Deviation of sampling measuring step | 0.025 degree at 400 kHz 0.05 degree at 800 kHz |
| Electric connector | The electric connector must not be plugged on or removed whilst under voltage. |
| Parameter | Value |
| RPM value | mechanical: Max. 10,000 RPM electrical: Max. 6,000 RPM |
| Anlauf-Drehmoment | w/o seal (IP54): < 0.010 Nm with seal (IP65): < 0.015 Nm |
| Shaft loading | axial: < 20 N radial: < 40 N |
| Inertia torque | 2 x 10⁻⁶ kgm² |
| Material | Housing: Steel Flange: Aluminium |
| Weight | Approximately 400 g |
| Parameter | Value |
| Ambient temperature | -20...+60 °C |
| Storage temperature | -20...+70 °C |
| Protection to | Shaft w/o seal: IP 54 Shaft with seal: IP 65 |
| Relative humidity | Max. 95 %, non-condensing |
| Endurance - Vibration | IEC 68 Section 2 - 6 (≤100 m/s² / 16-2000 Hz) |
| Endurance - Shock | IEC 68 Section 2 - 27 (≤2000 m/s² / 6 ms) |
| Interference immunity | EN 50082-2 EN 61000-4 - 2 to 4 Severity grade 3 |
| Emmited interference | EN 50081-2 |
