1. Introduction
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. Product Features
- 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.
- Circuit Protection: Built-in TVS (Transient Voltage Suppressor), Overcurrent (OC), and ESD protection safeguards sensitive electronic components against voltage spikes, surges, and short circuits, ensuring long-term durability.
- Easy to Use: Supports automatic driver installation on most operating systems. Compatible with Windows 7/8/10/11, Linux, and macOS.
- Open Design: Unique open hardware layout facilitates heat dissipation, enhances stability, and simplifies debugging and integration.
Image: Overview of the Jhoinrch RH-06 converter highlighting its main features like USB to RS485/422 bidirectional communication, TVS, ESD, and 600W peak voltage protection.
3. Package Contents
Please verify that all items are present in the package:
- 1 x Jhoinrch USB to RS422/485 Adapter (Model RH-06)
- 1 x 3.81 Terminal Block
- 1 x Screwdriver
- 1 x User Manual
Image: The complete package contents for the Jhoinrch RH-06 converter.
4. Setup
4.1 Driver Installation
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 System Compatibility
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 Hardware Connection
- 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. Operating Instructions
5.1 LED Indicators
The RH-06 adapter is equipped with three LED indicators to provide real-time status feedback:
- PWR (Power): 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 Pin Definitions
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 No. | RS422 | RS485 |
|---|---|---|
| 1 | RX+ | A+ |
| 2 | RX- | B- |
| 3 | TX- | NC (No Connection) |
| 4 | TX+ | NC (No Connection) |
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. Maintenance
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:
- Keep the device clean and free from dust and debris.
- Ensure all connections are secure and free from corrosion.
- Avoid exposing the device to extreme temperatures (-15°C to 70°C operating range) or high humidity (5%RH to 95%RH).
- Do not attempt to open or modify the device, as this may void the warranty and cause damage.
7. Troubleshooting
- Device Not Recognized:
- Ensure the USB connection is secure.
- Try connecting the adapter to a different USB port on your computer.
- 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 website.
- No Data Transmission/Reception:
- 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. Specifications
Image: The Jhoinrch RH-06 converter highlighting its main features like USB to RS485/422 bidirectional communication, TVS, ESD, and 600W peak voltage protection.
| Feature | Description |
|---|---|
| Product Type | USB to RS485/422 Adapter |
| Model Number | RH-06 |
| Baud Rate | 300-921600bps |
| Interface | USB 2.0 and RS485/422 |
| USB Connector | USB-A |
| USB Protection | 200mA self-recovery fuse, ESD protection |
| RS422/485 Connector | Screw terminal |
| RS422/485 Pins | RX+, RX-, TX-, TX+ (for RS422); A+, B- (for RS485) |
| Direction Control | Hardware automatic control |
| Protection | 600W lightning proof and surge-suppress, 15KV ESD protection (Onboard 120R balancing resistor) |
| Transmission Distance | About 1.2km (low rate) |
| Transmission Mode | Point-to-Multipoint (up to 32 nodes, repeaters recommended for >16 nodes) |
| Operating Voltage | 5V (via USB) |
| Operating Environment Temperature | -15°C to 70°C |
| Operating Environment Humidity | 5%RH to 95%RH |
| Compatible Devices | Desktop, Laptop |
| Dimensions (Approx.) | Length: 2.95 inches, Width: 0.98 inches, Height: 0.47 inches |
9. Warranty Information
The Jhoinrch RH-06 USB to RS485 RS422 Converter Adapter comes with a 1-year warranty 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.
The warranty does not cover damage caused by:
- Improper installation or use.
- Unauthorized modifications or repairs.
- Accidents, abuse, or neglect.
- Operating outside the specified environmental conditions.
10. Support
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 website: