The FGH4K-1200G-90G-NG/20P is a heavy-duty incremental encoder commonly installed on industrial equipment where stable feedback is required over long operating cycles. With a resolution of 1200 pulses per revolution, it is frequently used in drive systems that demand consistent speed control and reliable signal transmission under harsh conditions.
In many OEM-built machines, this encoder was selected during the original design phase and validated through long-term operation. When the original model becomes difficult to source, replacing it with a different specification often leads to unnecessary adjustments to mechanical structures or control logic.
To support ongoing maintenance needs, an OEM-level 1:1 custom replacement can be provided. The alternative encoder is manufactured to replicate the original mechanical dimensions, shaft configuration, pulse output, and electrical interface, allowing it to fit seamlessly into existing equipment.
Each unit undergoes functional testing before delivery to ensure stable performance and durability, making it a practical solution for maintaining heavy-duty machinery without redesign or downtime.
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 |
