Most personal computers do not incorporate in its basic configuration RS485 port but if a RS232C port. This usually occurs on the Windows operating system COMx (where x indicates the port number). The protocol also RS232c is asynchronous and works at the same speeds as can be converted to RS485 using an adapter or converter.

From the programmer's point of view the difference between RS485 and RS232 lies in that the former is half duplex and the second is full duplex. Since the half-duplex uses the same wires to transmit that to receive an additional line required for flow control.

it is generally used for the RTS line, which is activated and deactivated to transmit to receive. This may cause some problems for developers because in many cases it is necessary to install drivers that are incompatible with newer operating systems, or develop procedures for transmission / reception of data is not trivial that deviate from the initial problem.

To avoid these problems, our adapter includes a microcontroller that manages the flow control automatically so that only necessary signals transmission and reception. The algorithms implemented can not have downtime for change of flow so that communications are much more effective than those offered by our competitors equipment.

You can set our adapter card so that the flow is controlled from the program, you can choose between the RTS and DTR lines.

RS232c adapter port of the opto-isolated RS485, with the aim of preventing a surge in the RS485 bus as a result, such a beam, may damage or leave the computer out of service.

If your computer does not have RS232C port, you can add a RS232C port on the PCI bus or on the USB bus.