User manual

English Seriell RS-422/485 PCIe Board

3. Layout and Jumpersetting

3.1

3.13.1

3.1

Layout

Layout Layout

Layout

485-2W

485-4W

422

There are 4 jumpers listed as following to set the settings for the RS-422/485 port:

1. Mode Selection Jumper: JP3

2. Termination Resistor Enable/Disable Jumper: JP5

3. Echo or No Echo Selection Jumper: JP4

4. TXD Control Selection Jumper: JP2

485-2W = RS-485 Mode with 2-wire (Default)

485-4W = RS-485 Mode with 4-wire

422 = RS-422 Mode

1. Mode Setting (JP3):

3.2

3.23.2

3.2

Jumper setting

Jumper setting Jumper setting

Jumper setting

JP5:

Terminator

Enable / Disable

JP3: RS-422/485

Mode Selector

JP2, JP4:

RS-485TXD Control

J2:

Factory Use Only

J3:

DB9 male

RS-422/485 port