We provide a dedicated SSI encoder 1:1 replacement solution for the GM400.012A102 and GM400.A12A102 models, developed for direct use in existing absolute multiturn systems. This replacement is designed to replicate the original electrical behavior, data structure, and interface timing, allowing straightforward integration without modifying PLC logic, drive parameters, or wiring layouts.
The encoder operates via a Synchronous Serial Interface (SSI) and delivers high-resolution absolute position feedback across both singleturn and multiturn ranges. With stable code transmission and support for common code formats, it ensures consistent and repeatable position data even in applications with frequent acceleration, deceleration, or rapid sampling requirements. High switching performance enables reliable communication in systems where precise synchronization between encoder and controller is essential.
From a mechanical perspective, the replacement encoder is compatible with standard industrial mounting arrangements, enabling easy installation on existing shafts. Its internal architecture supports continuous self-diagnostic monitoring, including checks for signal integrity, code stability, and internal electronic status. These diagnostic functions contribute to improved system reliability and help reduce unplanned downtime.
This 1:1 replacement is well suited for servo systems, automated machinery, and positioning equipment where accurate absolute feedback and long-term operational stability are required.
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 |
