SIIG RS-422 Manuale utente

USB to RS-422/485

Serial Adapter

Quick Installation Guide

04-0862A

Introduction

The USB to RS-422/485 Serial Adapter provides

additional RS-422/485 serial port(s) to your

systems.

Key Features and Benefits

• Compliant with Universal Serial Bus 2.0

Specification

• Supports serial port data transfer rates up

to 1 Mb/s

• Built in 15KVDC ESD serial interface

protection

• LED indicators for TxD/RxD activities

• Metal housing with wall mount ready

System Requirements

• Desktop or notebook computer with an

available USB port

• Windows®

8 (32-/64-bit) / Windows 7 (32-

/64-bit) / Vista (32-/64-bit) / XP (32-/64-

bit) / Server 2003 & 2008 (32-/64-bit) /

Server 2008 R2

Package Contents

•USB to RS-422/485 Serial Adapter

• USB cable (Type A/B)

• Termination resistor jumpers (2 for ID-

SC0P11-S1, 4 for ID-SC0Q11-S1, 8 for ID-

SC0R11-S1)

• Software CD & quick installation guide

Layout

1-Port USB to RS-422/485 Serial Adapter

Figure 1: ID-SC0P11-S1 Layout

Status LED

Serial output DIP switch

USB Type B

Figure 2: ID-SC0Q11-S1 Layout

2-Port USB to RS-422/485 Serial Adapter

4-Port USB to RS-422/485 Serial Adapter

Figure 3: ID-SC0R11-S1 Layout

DIP switch (P2)

DIP switch

(P1)

USB Type B

Serial output

Status LED

• Tx: Flashing green when sending data

• Rx: Flashing yellow when receiving data

Serial output

DIP switch (P1-P4)

Status LED

USB Type B

5V power jack

(optional)

• 5V power jack (optional): Connect your

power adapter here (not included).

Note: Most serial devices do not require

additional power through the serial port.

Refer to your serial device's manual for

more information.

DIP Switch

Auto RS-422/485 (1-ON, 2-OFF)

This is default setting. The COM port will

automatically detect device status and control

the data transmitting or receiving. See Figure 4a.

RS-422 or 4-Wire RS-485 (1-OFF, 2-ON)

Full duplex mode. See Figure 4b.

Auto RS-422/485 RS-422 or 4-Wire RS-485

Figure 4a Figure 4b

Termination Resistor

Open the cover of the USB to RS-422/485 Serial

Adapter to configure the jumper settings.

1. Unscrew the screw(s) at the bottom of the

Adapter.

2. Slide the bottom cover in the direction of the

serial output to open.

Serial output

Figure 5

Figure 6

Bottom screw

3. Follow the instructions on page 6 to

configure the jumper settings.

Jumper Settings

RS-422 or 4-wire RS-485 working model with

termination resistor.

2-wire RS-485 working model with termination

resistor.

The adapter comes with Tx and Rx termination

resistors for each serial port. You can configure

the jumper settings to avoid impedance

mismatched problems.

Device

USBtoRS-422/485

Serial Adapter

USBtoRS-422/485

Serial Adapter

Default jumper setting is Open (disconnect 120

ohms termination resistor across the two wires).

Figure 7: Tx and Rx jumper for each port

Pin Assignment

P1- Rx P1- Tx

Note:Pins 6 to 9 have no function.

Figure 8: Pin assignment

RS-422 Wire Diagram

USBtoRS-422 RS-422 device

Pin 1: TxD-

TxD-

Pin 2: TxD+

TxD+

RxD+

Pin 4: RxD+

RxD-

Pin 3: RxD-

Figure 9: point-to-point / 4-wire full-duplex communication

USBtoRS-422 RS-422 device

RS-422 device

Figure 10: point-to-multi point / 4-wire full-duplex

communication

RS-485 Wire Diagram

Pin 1: TxD-

Pin 2: TxD+

Pin 4: RxD+

Pin 3: RxD-

Figure 11: Point-to-point / 2-wire half-duplex

communication

USBtoRS-485 RS-485 device

D+

D-

Figure 12: Point-to-multi point / 2-wire half-duplex

communication

USBtoRS-485 RS-485 device

RS-485 device

Windows Installation

Follow the instructions below to install the USB to

RS-422/485 Serial Adapter drivers.

Note: Do not plug the Adapter to your

computer until instructed to do so.

Windows 8 (32-/64-bit) / Windows 7 (32-/

64-bit) / Server 2008 R2

1. Insert the driver CD. Close the CD autoplay

box if prompted.

2. Press Windows key and R, type

D:\setup.exe, and click OK.(Change D: to

match your CD/DVD-ROM drive letter)

3. At the User Account Control, click Yes.

For 2008 R2, skip this step.

4. At the Program Compatibility Assistant,

click close. Skip this step if not prompted.

5. Repeat step 2 & 3.

6. Plug the adapter into the computer, click

Cancel at the Found New Hardware (if

prompted). The driver will install

automatically.

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