This manual introduces the features and usage of YF-504 RS485 Splitter. This product can amplify RS485 signals, improve line output power, and extend communication distance by 2000 meters per path.
The YF-504 RS485 Signal Distributor amplifies a single RS485 input and provides four isolated RS485 outputs, allowing long‑distance data communication in noisy environments. Each output can drive up to 128 devices, giving a total capacity of 512 nodes, and the device supports a communication distance of up to 2000 m per channel.
The manual details the wiring connections, power requirements (9‑12 V DC), and proper termination using a 120 Ω resistor at the farthest device on each loop. It also highlights the anti‑static and lightning‑proof design of the ports and provides usage instructions to avoid reversing the AB connections. This manual is written in Chinese.
| RS485 input channels | 1 |
|---|---|
| RS485 output channels | 4 |
| Maximum nodes per output | 128 |
| Maximum total nodes | 512 |
| Maximum communication distance per channel | 2000 m |
| Power supply voltage | 9‑12 V DC |
| Termination resistor per loop | 120 Ω |
The YF-504 has one RS485 input channel.
The device requires a 9‑12 V DC power supply.
A 120 Ω resistor should be placed at the farthest device on each RS485 output loop, with only one resistor per loop.