Advantech UNO-2178A User Manual download pdf (Page 19)

11 Chapter 2

2.2 UNO-2174A/2178A Interface (COM1~COM6)

UNO-2174A offers two standard RS-232/485 serial communication inter-

face ports: COM1 and COM2.

IRQ and Address Settings

The IRQ and I/O address range of COM1 to COM6 are listed below:

COM1: 3F8H, IRQ4

COM2: 2F8H, IRQ3

COM3: 3E8, IRQ10

COM4: 2E8, IRQ5

COM5: 2F0, IRQ11

COM6: 2E0, IRQ7

The setting can be adjusted in the bios page, the driver will be installed

automatically during OS installation

2.3 RS-232/422/485 Interface (COM A ~ B)

The UNO-2174A/2178A offers two RS-232/422/485 serial communica-

tion interface ports: COMA and COMB. Please refer to Appendix A.4 for

their pin assignments. The default setting of COMA and COMB are RS-

422/485. Please note COM A/B in Microsoft Windows is showed as

COM3,4 (UNO-2174A) or COM7,8 (UNO-2178A) in the device man-

ager after driver is installed.

Note: In S1 mode, COM A, B data re-transmission will not function prop-

erly and may include error signals after wake up.

Note: UNO-2178A offers additional 4 RS-232/485 COM port

COM3 ~ COM6 through expansion cable connected

from DB25 pin.

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Advantech UNO-2178A User Manual Page 19