Quatech HSU-200 사용자 설명서

Quatech Freedom USB Adapter User’s Manual

Making external connections

Testing RS-422/485 ports

Making a loopback

Step

Procedure

Description

Step 1

Turn off the computer.

Step 2

Connect the following signals on serial
port 1. Repeat for each serial port.

AuxOut+ (pin 1) to AuxIn+ (pin 5)

TxD+ (pin 2) to RxD+ (pin 4)
TxD– (pin 7) and RxD– (pin 8)

AuxOut– (pin 6) to AuxIn– (pin 9)
Repeat for each serial port.

Use any kind of conductive wire, even a
paper clip.

Step 3

Turn on the computer.

You are now ready to test each port
individually.

Figure 43 - RS-422/485 DB-9 connector

Install wire jumpers to connect the
following signals:

AuxOut+ (pin 1) to AuxIn+ (pin 5)

TxD+ (pin 2) to RxD+ (pin 4)

TxD– (pin 7) to RxD– (pin 8)

AuxOut– (pin 6) to AuxIn– (pin 9)

Figure 43 illustrates the
jumper location for a loopback

on the RS-422/485 DB-9

connector for Freedom USB-
200/300s.

Running Hyperterminal

Step

Procedure

Description

Step 1

Launch HyperTerminal.

In Windows, select Programs/

Accessories/ Communications/
HyperTerminal.

Step 2

Create a new session.

When prompted, give the session any

name you wish.

Step 3

Select the COM # associated with port 1

from the drop down list.

You are now set up to test the first serial

port.

Note: Leave all settings at default.

Step 4

With the session open, type any text.

If the text you type is echoed on the

screen, the port is functioning properly.

Step 5

Close the session.

Step 6

Repeat steps 2 through 5 for each serial

port.

If the text you type is echoed on the

screen, the port is functioning properly.

Rev 2.02 (2/24/2004)

Page 33