SIIG ID-UC0011-S1, ID-US0011-S1 Quick Installation Manual

USB to RS-422/485
Converter

Quick Installation Guide

Introduction

The USB to RS-422/485 Converter is designed to convert
USB signals to RS-422/485 compatible signal.

Features and Benefits

• Auto detect between RS-422 or RS-485 signal

• Zero jumper configuration

• 15KV ESD immunity, surge protection and short
circuit protection

• USB port powered; no AC adapter required

System Requirements

• Pentium® II or equivalent PC with an available USB
port

• Windows® 8 (32-/64-bit) / 7 (32-/64-bit) / Vista
(32-/64-bit) / XP (32-/64-bit) / Server 2003 (32-/
64-bit) / Server 2008 (32-/64-bit) / Server 2008 R2 /
2000

• Linux 2.6 / 3.x

Serial Number Sticker

For future product return or exchange, this serial number
is required. Please keep it for your reference.

04-0484B

Serial Number Part Number

1

Package Contents

• USB to RS-422/485 Converter

• USB cable

• Quick installation guide

Layout

USB
port

Figure 1: Top Layout

Power
LED

RS-422/485
Signal to
Target Device

Tx LED

Dip switch

Rx LED

1 2 3 4

Figure 2: Side Layout

DIP Switch

You can change the DIP switch to avoid impedance
mismatched problems.

• For RS-422, move DIP switch 1 down and switch 2
up to ON to enable 120 ohms terminal resistor

• For RS-485, move DIP switch 1 up to ON and switch
2 down to enable 120 ohms terminal resistor

• Move switch 1 & 2 down to disable terminal resistor

2

RS-422 or 4-wire RS-485 working model with termination
resistor:

Serial Adapter

Device

2-wire RS-485 working model with termination resistor:

Serial Adapter

Device

Pin Assignment
Refer to Figure 2 for the position of pin 1-4, then refer to

Table 1 below for pin assignment.

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Table 1

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3