User manual

19 Chapter 3

The jumper settings are schematically depicted in this manual as follows:

A pair of needle-nose pliers may be helpful when working with jumpers.

If you have any doubts about the best hardware configuration for your

application, contact your local distributor or sales representative before

you make any changes.

3.3 COM2 RS-232/422/485 Jumper setting

(J3/J4/J5 Located on internal motherboard)

The COM2 port located on rear face plate of ARK-3381 unit which can

be configured to operate in RS-232, RS-422 or RS-485 mode by setting

up the Jumper Pins of J3/J4/J5 located on internal motherboard of ARK-

3381 unit. The default setting of COM1 is RS-232.

(*): means default setting of the jumper/function

Please also refer to Chapter 6 “Full Disassembly Procedure of ARK-3381

Embedded Box Computer”.

3.4 COM3 RS-232/422/485 Jumper setting

(JP2/JP3/JP4 Located on internal I/O board)

The COM3 port connector located on rear face plate of ARK-3381 unit

which can be configured to operate in RS-232, RS-422 or RS-485 mode

by setting up the Jumper Pins of JP2/JP3/JP4 located on internal I/O

board of ARK-3381 unit. Please refer the Table 3.2 to select the setting.

The default setting value has been set for RS-232.

ABLE 3.1: COM2 RS-232/422/485 JUMPER SELECTION

Function Setting

RS-232 * J3 (1-2 closed) (J4, J5 open)

RS-422 J4 (1-2 closed) (J3, J5 open)

RS-485 J5 (1-2 closed) (J3, J4 open)