USB TO RS232/485/422/TTL

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USB TO RS232/485/422/TTL
USB TO RS232 422 TTl.jpg

FT232RNL RS232 RS485 RS422 TTL
RS232, RS422, RS485
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Overview

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

PRODUCT TYPE Industrial Grade Digital Isolated Converter
USB Operating voltage 5V
Connector USB-B
Protection 200mA self-recovery fuse, isolated output
RS232 Connector DB9 male
Protection TVS diode, surge protection & ESD protection
Transmission mode Point-to-point
Baud rate 300bps ~ 921600bps
RS485/422 Connector Screw terminal
Direction control Hardware automatic control
Protection 600W lightning-proof and surge-suppress, 15KV ESD protection (reserved two 120R balancing resistors, enabled/disabled via jumper)
Transmission mode Point-to-multipoints (485 mode: up to 32 nodes, it is recommended to use repeaters for 16 nodes or more; 422 mode: up to 256 nodes, it is recommended to use repeaters for 16 nodes or more)
Baud rate 300bps ~ 2Mbps
TTL (UART) Operating voltage 3.3V / 5V
Connector Screw terminal
Pins TXD, RXD, GND, 5V/3.3V
Protection Clamp protection diode, over-voltage/negative-voltage proof, shock resistance
Transmission mode Point-to-point
Baud rate 300 bps ~ 2Mbps
INDICATORS PWR Red power indicator, light up when there is a USB connection and voltage is detected
TXD TX indicator, light up when the USB port sends data
RXD RX indicator, light up when the device ports send data back
OPERATING ENVIRONMENT Temperature -15 ~ 70℃
Humidity 5% ~ 95%RH
OPERATING SYSTEM Mac, Linux, Android, Windows 11 / 10 / 8.1 / 8 / 7

Interface Introduction

USB TO RS232 485 422 TTL03.JPG
USB TO RS232 485 422 TTL04.JPG
USB TO RS232 485 422 TT06.JPG
USB TO RS232 485 422 TTL05.JPG

Dimensions

USB TO RS232 485 422 TTL06.png

Matching Resistor

USB TO RS232 485 422 TTL07.png
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.

USB TO RS4852-2.png

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

USB TO RS485-4.png

  • Click Extract:

USB TO RS4825-5.png

  • Click Next:

USB TO RS4852-6.png

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

USB TO RS4852-8.png

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

USB TO RS4852-9.png

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:
USB TO RS232 485 422 TTL08.png
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:

USB TO RS232 485 422 TTL09.png
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:

USB TO RS232 485 422 TTL10.png

Test USB To RS422 Communication

1. Connect the hardware as shown below:
USB TO RS232 485 422 TTL11.png
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:

USB TO RS232 485 422 TTL12.png

Test USB To RS232 Communication

1. Connect the hardware as shown below:
USB TO RS232 485 422 TTL13.png
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:
USB TO RS232 485 422 TTL14.png
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:
USB TO RS232 485 422 TTL15.png

Test USB To TTL Communication

1. Connect the hardware as shown in the figure below:
USB TO RS232 485 422 TTL20.png
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:
USB TO RS232 485 422 TTL21.png
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:
USB TO RS232 485 422 TTL22.png

Resource

Software

Datasheet

FAQ

 Answer:
  • In general, the short-distance communication can be removed from RS422/RS485's two 120Ω terminal, and connect jumper caps to NC.

USB TO RS232 faq.png

  • When multiple devices connect to the RS485 serial bus over a long distance, in general, we add 120Ω matching resistors to the first and last devices on the RS485 bus.

USB TO RS232 faq2.png

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 Answer:

RS232, RS422, and TTL are full-duplex communication, you can choose a loopback test to confirm the module function, the following RS422 as an example test:
USB TO RS232 faq3.png
USB TO RS232 faq4.png

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