That is why RS485 is currently a widely used communication interface in data acquisition and control applications where multiple nodes communicate with each other. Can control multiple ports simultaneously. Ucontrol Pty Ltd Australia specialize in temperature control & signal conditioning applications. Allows RS-232 equipment to utilize RS-485 networks, operating in either point-to-point or multi-point, 2-or 4-wire. Use with your standard PC or Laptop to control RS-485 devices directly with no special software required. Any standard communications software for your RS-232 serial ports will work. If you are running asynchronous start/stop communications (a UART) across the RS-485 wires, it simply will not work if the polarity is backwards. 120 Ω cable should provide the best performance, but the 100 Ω CAT-X cable may you have laying around may also work. RS232 is without doubt the best known interface, because this serial interface is implemented on almost all computers available today. Therefore the trigger level of the RS232 interface is set relatively high at ±3 Volt. Shifts in the ground level can have disastrous effects. If you ever wanted to connect to device in the same building (e.g. to machinery on production hal) and to you have to go to it to connect your computer.

But some device manufacturers match their A and B labels to the symbol (no inversion), and some match to the signaling waveform (inverted). A serial adapter, also referred to as a serial converter is a small electronic device which can convert one type of data signal into a different type of data signal. Plugging the device into the USB Port, it is automatically detected and installed. USB to RS485 Converter ใช้ต่อกับ USB port ของ PC หรือ Note Book แปลงเป็นสัญญาณ RS485 Communication. The USB to RS485 Converter is designed to make serial port expansion quick and simple. Using an RS485 interface, up to 32 serial devices can be connected to one transmitter. 5 digitals are available in one second.

An RS232 interface is a system based on voltage levels and performs optimally in situations where there are minimal differences in ground potential. The RS232 Serial Interface is designed to connect two devices. The USB to RS485 Converter is a cost-effective module for transfer serial data over USB. Environments that exhibit high levels of electrical noise and variable ground potential impact RS232’s ability to transfer data efficiently and can lead to data loss or corruption. A byproduct of the differential voltage system is the extended data transfer distance, increased transmission speed, and lower voltage use seen with RS485. The RS485 protocol employs a differential voltage system that allows it to operate effectively in environments with higher levels of electrical noise. RS232 signals are represented by voltage levels with respect to system common (power ground). The CONV-USBTORS232/485 module derives the power from the USB port and doesn't need any power adapter. Conformal coating, a 12VDC Switching Power Supply(Wall Wart), an enclosure, and a 7ft DB9F to RJ11/12 RS232 cable, are available. This cable, commonly referred to as Category 5 cable, is defined by the EIA/TIA/ANSI 568 specification.

ตัว Converter สามารถ Auto Selectable Baud Rate ให้อัตโนมัติ , ด้าน RS485 มีขั้วต่อให้เลือกใช้ได้ทั้งแบบ สกรูขัน(Terminal) หรือ ขั้ว RJ-11, สามารถใช้งานเป็น Converter RS232 to RS422 ได้โดยการสลับ Dip Switch ภายในกล่อง , Converter ตัวนี้ผ่านการทดสอบ การใช้งานภายในโรงงานอุตสาหกรรมมาแล้วเป็นอย่างดี(Industrial Specification).

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