The TH4108-M/A remote controller is an intelligent instrument for operating a frequency transformer over RS485 networks. It can start, stop, accelerate, decelerate, and reverse the transformer while displaying set and actual frequencies. Communication distance can reach up to 1200 m at 9600 bps, reducing interference.
The device features external operation buttons, master/monitor modes, and LED indicators (RUN, FWD/REV, ERR, COM). Two hardware versions (M and A) differ in size, power inputs, and button layout. The manual provides detailed wiring diagrams, parameter configuration, and safety precautions for reliable installation and use. This manual is written in Chinese.
| Maximum RS485 communication distance | 1200 m (9600 bps) |
|---|---|
| RS485 interface | Optically isolated |
| M‑type dimensions | 48 × 96 mm |
| A‑type dimensions | 80 × 160 mm |
| A‑type power input | 220 V AC |
| M‑type LED indicators | RUN, FWD/REV, ERR, COM |
The controller can communicate up to 1200 meters at a baud rate of 9600 bps.
The M‑type unit has four LEDs: RUN, FWD/REV, ERR, and COM.
All external I/O signals are low‑level active; closing the corresponding contact drives the function.