The FGH4K-500G-90G-NG/20P is a low-to-medium resolution heavy-duty incremental encoder commonly used in industrial equipment where stable speed feedback is required rather than ultra-high precision. Typical applications include rolling lines, conveying systems, and auxiliary drives in metallurgical plants.
In recent years, users have reported increasing difficulty in obtaining this specific encoder model through normal procurement channels. For production lines that have already been commissioned and validated, switching to a different encoder type often introduces unnecessary risks, including mechanical mismatch and control system reconfiguration.
To address this issue, a customized 1:1 replacement solution can be provided. The alternative encoder is developed strictly according to the original specifications, including pulse count (500 PPR), mechanical dimensions, shaft structure, signal characteristics, and connector layout. This allows the replacement unit to be installed directly without modifying the machine or PLC program.
Each unit is assembled using industrial-grade components and undergoes functional and load testing before delivery. This approach ensures consistent performance and long-term reliability in demanding environments.
Technical Datasheet
| Parameter | Value |
| Pulse rates | |
| 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, 40000, 50000 (further pulse rates according to customers specification) |
| Connection data | |
| Supply voltage | 12 V ... 30 V DC (For 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 $I_L$ 30 mA |
| Output current | max. 150 mA at 24 V (observe derating) |
| Internal resistance | 75 Ω at 24 V |
| Slew rate | 200 V / µs with $C_L$ 100 pF |
| Duty cycle | 1 : 1 ± 3 % for standard pulse rates 1 : 1 ± 5 % for special pulse rates up to 25000 pulses |
| Square wave displacement 0°, 90° | 90° ± 3 % for standard pulse rates 90° ± 5 % or special pulse rates up to 25000 pulses |
| Max. frequency | 200 kHz, Higher max. frequency on request |
| Special output voltage 5V (TTL) | |
| 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 |
