TH-4558 is a smart isolated communication hub that supports intelligent eight-way distribution and separation of RS232/RS485 bus ports, and the communication distance of each branch can reach 1.2km or more.
The TH-4558 is a high‑performance RS232/RS485 eight‑port hub with one RS232 and one RS485 host ports and four RS485 branch ports. It offers optical isolation, built‑in surge protection up to 15 kV, and can communicate over distances exceeding 1.2 km.
The manual covers product overview, key features such as fault detection and signal‑synchronization technology, detailed interface definitions, installation wiring, usage precautions, and troubleshooting steps for reliable operation in industrial automation, parking, banking, and access‑control systems. This manual is written in Chinese.
| Interface Compatibility | RS232, RS485 |
|---|---|
| Isolation Strength | 3500 VRMS, 500 VDC |
| ESD Protection | 30 kV IEC 61000‑4‑2 |
| Surge Protection | 15 kV IEC 61000‑4‑2 |
| Transmission Rate | 115.2 kbps |
| Maximum Communication Distance | 2 km |
| Drive Capability per RS485 Branch | 128 devices |
| Power Supply Voltage | ~180 V to ~250 V |
| Average Power Consumption | 10 W |
| Dimensions | 430 × 255 × 445 mm |
| Operating Temperature | -20 °C to +50 °C |
The TH-4558 has eight RS485 branch ports plus one RS485 bus port, for a total of nine RS485 ports.
The device can communicate up to 2 km, and up to 1.2 km at the highest baud rate of 115.2 kbps.
It includes 15 kV IEC 61000‑4‑2 surge protection and 30 kV IEC 61000‑4‑2 ESD protection.
The isolation strength is rated at 3500 VRMS and 500 VDC.