Introduction

USB TO RS232/485/422/TTL, an industrial-grade isolated converter, adopts the original FT232RNL, built-in protection circuits including power isolation, ADI magnetical isolation and TVS, and with aluminum alloy case design. USB TO RS232/485/422/TTL is easy to operate and features an automatic transmission and reception conversion with zero delays. Also, it features various advantages, such as fast communication speed, stability, reliability, and safety, and can be applied to various industrial control devices or applications with high communication requirements.

Feature

• Adopt original FT232RNL chip, fast communicating, stable and reliable, better compatibility.
• Supports multiple communication interface conversion: USB to RS232, USB to RS485, USB to RS422, USB to TTL.
• Onboard unibody power supply isolation, provides stable isolated voltage and needs no extra power supply for the isolated terminal.
• Onboard unibody digital isolation, allows signal isolation, high reliability, strong anti-interference, and low power consumption.
• Onboard TVS (Transient Voltage Suppressor), effectively suppresses surge voltage and transient spike voltage in the circuit, lightning proof & ESD protection.
• Onboard self-recovery fuse and protection diodes, ensure the current/voltage stable outputs, provides over-current/over-voltage proof, and improve shock resistance.
• Fully automatic transceiver circuit with no delay, ensures the USB port communicates with different interfaces fastly and stably, without interfering with each other.
• Onboard TTL serial 3.3V/5V voltage translator, config the TTL level via a switch.
• 3x LEDs for indicating the power and transceiver status.
• High-quality USB-B and RS232 connectors, smoothly plug/pull.
• Industrial grade metal case, supports wall-mount and rail-mount installations, solid and beautiful, easy to install.

Parameters

Interface Introduction

Dimensions

Matching Resistor

Note: The RS422 and RS485 interfaces of USB TO RS232/485/422/TTL also have a built-in 120R enable resistor, which is enabled by default, and the user can disassemble the case to modify the settings as needed.
Modification method: modify the yellow jumper cap at the red frame.

Software Installation

USB Driver Installation

• The first method: download the driver wizard from the Internet, and automatically detect and install the driver.
• The second method: manually install the driver (the following uses WIN7 installation as an example).
• Connect the device to the computer via a USB cable, and check the device manager, the serial port number has a yellow exclamation mark, indicating that the driver is not installed.

• You can download the software installation package on the official website WIKI.

• Click Extract:

• Click Next:

• Check I accept this agreement (A), and then click Next:

• Click Finish, and check the computer device manager at this time, you can see that the port number is already available for normal use.
  

Hardware Test

Test environment: PC (Windows operating system)
Accessories required for testing:

• USB TO RS232 485 422 TTL x2
  
• Several DuPont wires
  
• USB-A male to USB-B male cable
  
• DB9 female-to-female cable
  

Test USB to RS485 communication

1. Connect the hardware as shown below:

2. Open two sscom software windows, open the corresponding serial port number, set the baud rate to 115200bps, enter the box "abcdefg", then open the serial port to test sending and receiving: (the same method as the RS232 test).
First, check the scheduled sending on the left window, and the time can be set to 100ms/time to see if it is sent to the right window normally, there will be no packet loss or garbled characters, and if it is normal, turn off the scheduled sending, as shown in the figure below:

3. Then check the timing sending in the right window, and the time can be set to 100ms/time to see if it is sent to the left window normally, there will be no packet loss or garbled characters, and if it is normal, turn off timing sending, as shown in the figure below:

Test USB To RS422 Communication

1. Connect the hardware as shown below:

Note: The RS485 interface of this product also has a built-in 120R enabling resistor, which is turned on by default. Users can disassemble the case to modify the settings according to their needs. If signal isolation is required, PE can also be connected to the ground.

• Open two SSCOM windows on the computer, open the corresponding port number, set the same baud rate, and click "Send" at regular intervals to receive and send normally. The test results are shown in the figure below:

Test USB To RS232 Communication

1. Connect the hardware as shown below:

2. Open two sscom software windows, open the corresponding serial port number, set the baud rate to 115200bps, enter the box "abcdefg", and then open the serial port to perform the sending and receiving test:
First, check the scheduled sending on the left window, and the time can be set to 100ms/time to see if it is sent to the right window normally, there will be no packet loss or garbled characters, and if it is normal, turn off the scheduled sending, as shown in the figure below:

3. Then check the timing sending in the right window, the time can be set to 100ms/time, and see if it is sent to the left window normally, there will be no packet loss or garbled characters, and if it is normal, turn off timing sending, as shown in the figure below:

Test USB To TTL Communication

1. Connect the hardware as shown in the figure below:

2. Open two sscom software windows, open the corresponding serial port number, set the baud rate to 115200bps, enter the box "abcdefg", then open the serial port, and perform the sending and receiving test: (the same method as the RS232 test.)
3. Check the scheduled sending on the left window first, and the time can be set to 100ms/time to see if it is sent to the right window normally, there will be no packet loss or garbled characters, and if it is normal, turn off the scheduled sending, as shown in the figure below:

4. Then check the timing sending on the right window, the time can be set to 100ms/time, and check whether it is sent to the left window normally, there will be no packet loss or garbled characters, and if it is normal, turn off timing sending, as shown in the figure below:

Resource

Software

• VCP Driver (or download from FTDI official website):
  • FT232 Driver-Windows-32bit
  • FT232 Driver-Windows-64bit
  • MAC FT232 Driver-MAC-64bit
• Sscom Windows
• Sscom Android
• Putty

Datasheet

• FT232R
• SP481E SP485E

FAQ

Support