The FGH4K-100G-90G-NG/20P is a low-pulse heavy-duty incremental encoder typically used in industrial systems where rotational speed monitoring is more critical than fine position resolution. With 100 pulses per revolution, it is commonly installed on auxiliary drives, large motors, and slow-speed machinery operating under continuous mechanical load.
In many long-running production lines, this encoder was selected during the original equipment design phase. Over time, users may encounter difficulties sourcing the same model, while replacing it with a different specification often leads to signal mismatch or unstable feedback in the control system.
To address this, a 1:1 custom replacement solution can be provided. The alternative encoder is manufactured according to the original mechanical outline, shaft configuration, pulse count, output signal type, and connector orientation. This allows the encoder to be installed directly without modifying brackets, couplings, or PLC parameters.
Each replacement unit is tested for signal consistency and durability before delivery, ensuring reliable operation in demanding industrial environments and providing a practical way to keep existing equipment running smoothly.
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 |
