Rs-232/422/485 Interface (Com1, Com2); Oxupci952 Uarts With 128 Bytes Fifo; Rs-422/485 Detection; Automatic Data Flow Control Function For Rs-485 - Advantech UNO-4683 User Manual

Intel core i7 dual core automation computer with 6xlan, 2xcom, 3 expansion slots

Hide thumbs Also See for UNO-4683:

Table of Contents

2.4 RS-232/422/485 Interface (COM1, COM2)

The UNO-4683 offers two RS-232/422/485 serial communication inter-

face ports: COM1 and COM2. Please refer to Appendix A.2 for their pin

assignments. The default setting of COM1 and COM2 are RS-232.

Note:

Windows usually recognize the COM ports start from

COM3, so these two ports might be named as COM3

and COM4 in Windows. The function will not be affected

and user can also change the name in the Windows

Device Manager easily.

Advantech UNO-4683 comes with Oxford OXuPCI952 UARTs contain-

ing 128 bytes FIFOs.

In RS-422/485 mode, UNO-4683 automatically detects signals to match

RS-422 or RS-485 networks. (No jumper change required)

In RS-485 mode, UNO-4683 automatically detects the direction of

incoming data and switches its transmission direction accordingly. So no

handshaking signal (e.g. RTS signal) is necessary. This lets you conve-

niently build an RS-485 network with just two wires. More importantly,

application software previously written for half duplex RS-232 environ-

ments can be maintained without modification.

UNO-4683User Manual

Table of Contents