The FG4S‑1024G‑90G‑NG incremental encoder is a legacy industrial encoder widely used in heavy-duty applications such as steel mills, rolling lines, conveyor systems, and metallurgical automation. With this model now obsolete, sourcing the original component has become increasingly challenging. To address this, a 1:1 custom replacement solution has been developed, replicating the original encoder’s mechanical dimensions, shaft design, electrical interfaces, and incremental output characteristics.
Engineered for harsh environments, the replacement encoder provides high reliability, precision feedback, and resistance to vibration and temperature variations, ensuring continuous operation of production equipment. The custom solution allows for seamless integration into existing systems without any modifications to machinery, wiring, or control logic.
This replacement service is designed to minimize downtime and maintain production continuity. Optional customizations are available to meet specific operational needs, such as unique pulse resolutions or shaft configurations. This approach ensures that companies reliant on the FG4S‑1024G‑90G‑NG can maintain equipment performance and extend operational life without compromise.
Technical Datasheet
Pulse rates
| Category | Value |
|---|---|
| Standard pulse rates | 500, 600, 1000, 1024, 1200, 2000, 2048, 2400, 2500 |
| Special pulse rates | 4000, 4096, 4800, 5000, 8192, 10000, 12000, 16000, 16384, 20000, 25000(further pulse rates according to customers specification) |
Connection data
| Parameter | Details |
|---|---|
| Supply voltage | 12 V … 30 V DCFor UL and CSA Class 2 supplied |
| No load-current | approx. 50 mA at 24 V |
| Outputs | Current limited, short-circuit proof push-pull line driver with integrated impedance adaptation for 30 to 140 Ω lines. |
| Pulse height (HTL) | approx. as supply voltage, output saturation voltage < 0.4 V at Iₗ 30 mA |
| Output current | max. 150 mA at 24 V (observe derating) |
| Internal resistance | 75 Ω bei 24 V |
| Slew rate | 200 V / μs with Cₗ 100 pF |
| Duty cycle | 1:1 ± 3 % for standard pulse rates1:1 ± 5 % for special pulse rates up to 25000 pulses |
| Square wave displacement 0°, 90° | 90° ± 3 % for standard pulse rates90° ± 5 % for special pulse rates up to 25000 pulses |
| Max. frequency | 200 kHz, Higher max. frequency on request |
Special output voltage 5V (TTL)
| Parameter | Details |
|---|---|
| Pulse height | 5V, RS422-compatible (TIA/EIA - Standard) |
| Supply voltage | 12 … 30 V DC (optional: 5 V DC)For UL and CSA Class 2 supplied |
