Chapter 2 Hardware Installation - Advantech PCL-746+ User Manual

A four port serial communication interface card

The board will be shipped in the RS-232 mode (Enhanced), all the

jumpers on the 12*3 pin jumper will be set to the upper position, this is

the cards default setting. The PCL-746+ DIP switch and jumper default

settings are as shown below:

Jumper

Port1

Port2

Port3

Port4

JP4

Firstly you have to decide which mode each port will be operating in,

RS-232, RS-422 or RS-485. You can configure each port to operate in a

different mode if required. Each port has to be individually setup by

selecting the correct jumper configurations on two jumper groups, one

pair for each port. These consist of a 12*3 pin jumper (RS-232) and a

1*3 pin jumper (RS-422/RS-485).

Note: The second (RS-422/RS-485) jumper group is ineffective

when the main jumper group is configured to operate in

the RS-232 mode.

Should you wish to configure the PCL-746+ to operate in the RS-232

mode, then the upper two pins of the 12*3 pin jumper should be

connected. For RS-422/ RS-485 mode selection, the bottom two pins of

the 12*3 pin jumper should be connected as shown below.

Default Function

RS-232

IRQ12

Address 300H

Interrupt register 280H

Chapter 2

Hardware Installation