Carbon dioxide is one of the standards for measuring indoor air quality, but unlike other pollutants, carbon dioxide has no color or smell, and carbon
USB to RS485 Converter
It is an industrial grade converter that extends one RS-485 interface via USB. Enables RS-485 devices to be easily connected to a host computer with a USB interface. The transparent transmission mode provided by the virtual serial port enables the application written for the standard computer serial port to be connected to the RS-485 device without any modification. This USB to rs485 converter price is cheap.
- Model: RS-USB-485-3
- MOQ: 1 PCS
- Delivery date: within 24 hours
- Price: $6.71
View - Industrial USB to rs485 converter
The transparent transmission mode provided by the virtual serial port of the USB to 485 converter module enables the application program originally written for the standard computer serial port to be connected to the RS-485 device without any changes.
USB to rs485 converter features
1. USB bus power supply, no external power supply required
2. Compliant with USB2.0 standard, backward compatible
3. Transparent transmission, users do not need to change the agreement
4. Support plug and play plug and play (USB end), communication rate 300-921.6KBPS adaptive
5. Adopt fuse + TVS protection circuit for current and voltage protection, reverse connection protection.
6. RS485 end adopts advanced automatic flow control technology to automatically recognize RS485 signal flow direction
7. The USB-side physical interface is a standard USB socket. A USB cable is included with the product to facilitate connection with the computer, which solves the shortcomings of directly connecting the USB port.
USB to rs485 converter parameters
Standard: Comply with USB2.0 (compatible with USB1.1), EIA RS485 standard
With a two-way communication indicator, it can indicate the status of data receiving and sending, which is convenient for debugging
The driver supports Windows Server 2008 /Windows 7 /Windows Vista /Windows Server 2003 /Windows XP /Windows ME /Windows 98 and other operating systems
RS-485 signal: 485A(+), 485B(-)
Support baud rate range: 2400-19200
Send buffer: 128 Bytes
Receive buffer: 384 Bytes
Working environment: -40℃～85℃, 5%～95%
Load capacity: support up to 200 similar nodes
Transmission distance: 1.5 meters for USB end
Interface mode: USB end interface is female, RS485 end is wiring terminal
Input power: external power supply
After installing the device driver, plug and play
Working mode: Asynchronous half-duplex
FAQ - USB to rs485 converter
You can insert more than one, which has been verified by experiment.
It can be modified. It can be modified if it does not conflict with the existing COM port that comes with the computer. Specific method: right-click on the “communication port COM?” to be modified—-left click to select “Properties”—-left click to select “port settings”—-left click to select “advanced” — Select the COM port that does not conflict with the computer in the “COM port number”.
First, check whether the wiring is correct, it is usually a wiring problem; for USB to 485: If the communication distance is too long, check whether the 120R matching resistance at the beginning and end of the bus is correctly connected, etc.
For compatible assembled computers, be sure to plug the conversion cable into the USB port on the back of the motherboard. It may be better for branded computers, but it is also recommended to plug it into the USB port on the back of the motherboard. Notebooks generally do not have this problem.
It is usually used with our rs485 sensor equipment and directly connected to the computer to obtain the value.
1. Data communication failure
Check whether the USB interface is normal, you can try another USB interface or another computer
Check whether the RS485 output interface wiring is correct
Check whether the USB data cable is normal
Check whether the wiring terminals are well connected
Observe whether the red indicator light flashes when receiving data
Observe whether the green indicator light flashes when sending data
2. Data loss or error
Check whether the data communication baud rate, format, etc. are consistent
Check whether the 485A and 485B of USB to 485 are connected to the 485A and 485B of other devices. Make sure that the two terminals with the same name are connected
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