1. Úvod
The Jhoinrch RH-06 is a versatile USB to RS485/RS422 converter designed to facilitate bidirectional communication between computer USB ports and industrial equipment utilizing RS485 or RS422 interfaces. It is an ideal choice for automation, data acquisition, and various industrial applications, ensuring stable data transmission and broad device compatibility.
2. Vlastnosti produktu
- USB to RS485/RS422 Conversion: Effortlessly converts industrial equipment's RS485/RS422 interfaces to computer USB ports.
- FT232RNL Chip: Features the FT232RNL chip solution for high stability in data transmission and broad device compatibility across complex industrial applications.
- Ochrana obvodu: Vestavěný TVS (Transient Voltage Suppressor), Overcurrent (OC), and ESD protection safeguards sensitive electronic components against voltage spikes, surges, and short circuits, ensuring long-term durability.
- Snadné použití: Supports automatic driver installation on most operating systems. Compatible with Windows 7/8/10/11, Linux, and macOS.
- Otevřený design: Unique open hardware layout facilitates heat dissipation, enhances stability, and simplifies debugging and integration.

Obrázek: Overview of the Jhoinrch RH-06 converter highlighting its main features like USB to RS485/422 bidirectional communication, TVS, ESD, and 600W peak voltage ochrana.
3. Obsah balení
Prosím, ověřte, zda jsou v balení přítomny všechny položky:
- 1 x Jhoinrch USB to RS422/485 Adapter (Model RH-06)
- 1 x 3.81 Terminal Block
- 1 x Šroubovák
- 1 x Uživatelská příručka

Image: The complete package contents for the Jhoinrch RH-06 converter.
4. Nastavení
4.1 Instalace ovladače
The RH-06 adapter typically installs drivers automatically upon connection to a compatible operating system. If automatic installation does not occur, please refer to the official Jhoinrch support website for specific driver downloads and installation instructions.
4.2 Kompatibilita systému
The adapter is fully compatible with a wide range of operating systems, including:
- Windows 7/8/10/11
- Linux
- macOS

Image: The Jhoinrch RH-06 converter demonstrating compatibility with various operating systems.
4.3 Hardwarové připojení
- Connect the USB Type-A end of the RH-06 adapter to an available USB port on your computer (desktop or laptop).
- Using the provided terminal block and screwdriver, connect your RS485 or RS422 device to the corresponding pins on the adapter. Ensure correct polarity and pin assignments as detailed in the 'Pin Definitions' section.
5. Návod k obsluze
5.1 LED indikátory
The RH-06 adapter is equipped with three LED indicators to provide real-time status feedback:
- PWR (výkon): Illuminates when the adapter is connected to a USB port and receiving power.
- TXLED (Transmit): Flashes when the computer is sending data through the adapter.
- RXLED (Receive): Flashes when the adapter is receiving data from the connected RS485/RS422 device.

Image: The Jhoinrch RH-06 converter with its three LED indicators labeled for Power, Data Transmitting, and Data Receiving.
5.2 Definice pinů
Refer to the following pin definitions for correct wiring of your RS422 and RS485 devices. The adapter also includes a switch for a 120Ω termination resistor.

Image: Detailed pin definitions for RS422 and RS485 connections on the RH-06 adapter, including the 120Ω switch.
| Pin č. | RS422 | RS485 |
|---|---|---|
| 1 | RX+ | A+ |
| 2 | RX | B- |
| 3 | TX | NC (bez připojení) |
| 4 | TX+ | NC (bez připojení) |
120Ω Resistor Switch: The adapter includes a switch to enable or disable a 120Ω termination resistor. This resistor is often required at the ends of an RS485/RS422 bus to prevent signal reflections. Consult your device's documentation for proper termination requirements.
6. Údržba
The Jhoinrch RH-06 adapter is designed for durability and requires minimal maintenance. Its built-in TVS, OC, and ESD protection features help ensure long-term reliability. To maintain optimal performance:
- Udržujte zařízení čisté a bez prachu a nečistot.
- Ujistěte se, že všechny spoje jsou bezpečné a bez koroze.
- Avoid exposing the device to extreme temperatures (-15°C to 70°C operating range) or high humidity (5%RH to 95%RH).
- Nepokoušejte se zařízení otevírat ani upravovat, mohlo by dojít ke zrušení záruky a poškození.
7. Řešení problémů
- Zařízení nebylo rozpoznáno:
- Ujistěte se, že je připojení USB bezpečné.
- Zkuste připojit adaptér k jinému USB portu na počítači.
- Test the adapter on another computer to rule out system-specific issues.
- If drivers are not automatically installed, manually install them from the official Jhoinrch support webmísto.
- Žádný přenos/příjem dat:
- Verify correct wiring according to the 'Pin Definitions' section. Incorrect polarity is a common issue.
- Check the TXLED and RXLED indicators for activity. If no LEDs flash during communication attempts, there might be a wiring or software configuration problem.
- Ensure the 120Ω termination resistor switch is set appropriately for your network configuration (e.g., enabled at the ends of a bus, disabled in the middle).
- Confirm that the baud rate and other communication parameters in your software match those of the connected device.
- Intermittent Connection or Data Errors:
- Check for loose connections at both the USB and terminal block ends.
- Ensure the device is within the specified transmission distance (up to 1.2km at low rates). For longer distances or more than 16 devices in a multi-point setup, using repeaters is recommended.
- Minimize electromagnetic interference by keeping the adapter and cables away from strong electrical noise sources.
8. Specifikace

Image: The Jhoinrch RH-06 converter highlighting its main features like USB to RS485/422 bidirectional communication, TVS, ESD, and 600W peak voltage ochrana.
| Funkce | Popis |
|---|---|
| Typ produktu | USB to RS485/422 Adapter |
| Číslo modelu | RH-06 |
| Přenosová rychlost | 300-921600bps |
| Rozhraní | USB 2.0 and RS485/422 |
| Konektor USB | USB-A |
| Ochrana USB | 200mA samoobnovovací pojistka, ochrana proti elektrostatickému výboji |
| Konektor RS422/485 | Šroubová svorka |
| RS422/485 Pins | RX+, RX-, TX-, TX+ (for RS422); A+, B- (for RS485) |
| Řízení směru | Hardwarové automatické ovládání |
| Ochrana | 600W lightning proof and surge-suppress, 15KV ESD protection (Onboard 120R balancing resistor) |
| Přenosová vzdálenost | About 1.2km (low rate) |
| Režim přenosu | Point-to-Multipoint (up to 32 nodes, repeaters recommended for >16 nodes) |
| Provozní svtage | 5V (přes USB) |
| Teplota provozního prostředí | -15 °C až 70 °C |
| Provozní prostředí Vlhkost | 5% RH až 95% RH |
| Kompatibilní zařízení | Stolní počítač, notebook |
| Rozměry (přibližně) | Délka: 2.95 palce, Šířka: 0.98 palce, Výška: 0.47 palce |
9. Informace o záruce
The Jhoinrch RH-06 USB to RS485 RS422 Converter Adapter comes with a 1-letá záruka from the date of purchase. This warranty covers manufacturing defects under normal use. For warranty claims or service, please retain your proof of purchase and contact Jhoinrch customer support.
Záruka se nevztahuje na poškození způsobené:
- Nesprávná instalace nebo použití.
- Neoprávněné úpravy nebo opravy.
- Nehody, zneužívání nebo zanedbávání.
- Operating outside the specified environmental conditions.
10. Podpora
For further assistance, technical support, or to download the latest drivers, please visit the official Jhoinrch website. When contacting support, please have your product model number (RH-06) and purchase details readily available to ensure efficient service.
You can typically find support resources and contact information on the brand's official Amazon store page or webmísto:





