Datenblatt für USB-COM422-Plus-2 von FTDI, Future Technology Devices International Ltd

CEF© sunuart1@ftdi hin.com http://www.ftdichip.com

Future Technology Devices International Ltd (FTDI)

Unit 1, 2 Seaward Place, Centurion Business Park, Glasgow, G41 1HH, United Kingdom

Tel.: +44 (0) 141 429 2777 Fax: + 44 (0) 141 429 2758

E-Mail (Support): support1@ftdichip.com Web: http://www.ftdichip.com

Neither the whole nor any part of the information contained in, or the product described in this manual, may be adapted or reproduced

in any material or electronic form without the prior written consent of the copyright holder. This product and its documentation are

supplied on an as-is basis and no warranty as to their suitability for any particular purpose is either made or implied. Future Technology

Devices International Ltd will not accept any claim for damages howsoever arising as a result of use or failure of this produ ct. Your

statutory rights are not affected. This product or any variant of it is not intended for use in any medical appliance, device or system in

which the failure of the product might reasonably be expected to result in personal injury. This document provides preliminary

information that may be subject to change without notice. No freedom to use patents or other intellectual property rights is implied by

the publication of this document. Future Technology Devices International Ltd, Unit1, 2 Seaward Place, Centurion Business Park,

Glasgow, G41 1HH, United Kingdom. Scotland Registered Number: SC136640

Future Technology Devices International Ltd

USB-COM422-PLUS2

Datasheet

Document Reference No.: FT_000135

Version 1.2

Issue Date: 2011-05-06

FTDI mm 2 Datasheel Chip Version 1.2 Clearance "0.: FTDI#103 wwwftdichipxom

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

1 Introduction

1.1 Functional Description

The USB-COM422-PLUS2 is a USB to a dual interface RS422 level serial UART adaptor incorporating

FTDI’s FT2232H Hi-Speed USB2.0 (480Mb/s) to dual serial UART interface IC device. The FT2232H

handles all the USB signaling and protocols. The adaptor provides a fast, simple way to connect devices

with an RS422 interface to USB.

USB-COM422-PLUS2 is a USB to a dual-port RS422 adapter.

The integrated electronics of the USB-COM422-PLUS2 utilise the FTDI FT2232H and includes RS422 level

shifters plus TXD/RXD LEDs to provide a visual indication of data traffic through the module.

Figure 1.1 USB-COM422-Plus2

The module uses a standard USB-B device connector for connection to an upstream host or hub port.

RS422-level signals, including modem handshake signals, are available on an industry-standard DE-9P

connector. The maximum RS422-level data rate is 10Mbps.

The USB-COM422-Plus2 module requires USB device drivers, available free from www.ftdichip.com, which

are used to make the USB-COM422-Plus2 appear as a Virtual COM Port (VCP). This allows existing serial

communications software, such as HyperTerminal, to exchange data through the USB-COM422-Plus2 to a

legacy RS422 peripheral device.

"- FTDI .: F'r_ooo135 2 Datasheet , _ Chip Version 1.2 Clearance No.: FTDI#103 ,w‘n. USB B Client Connector FTDI FT2232H Dual RS422 Level 5 Dual D P Connector (Male)

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

1.2 LED Description

The USB-COM422-Plus2 uses five LEDs to indicate a valid link as well as data traffic according to the

following table:

LED Colour

Function

Description

Yellow x 1

Power

ON when USB-COM-Plus is configured and ready

Red x 2

TxD Activity

Flashes when data is transmitted from the USB-COM422-Plus2 to the

attached RS422 device

Green x 2

RxD Activity

Flashes when data is transmitted from the attached RS422 device to the

USB-COM422-Plus2

Table 1.1 – LED Description

1.3 Block Diagram

FTDI FT2232H

Hi-Speed USB Serial

Bridge

RS422

Level Shifter

USB B

Client

Connector

DE-9P

Connector

RS422

Level Shifter DE-9P

Connector

Channel A

Channel B

Figure 1.2 USB-COM422-PLUS2 Block Diagram

1.3.1 Block description

USB B Client Connector

This connector provides the interface for connection to a USB Host or Hub port. The maximum cable

length is 5 meters, according to the USB 2.0 specification.

FTDI FT2232H

FT2232H Hi-Speed USB2.0 (480Mb/s) is a dual serial UART interface IC device. Operating system device

drivers are required in order to work with the one to provide the Virtual COM Port serial functionality.

Dual RS422 Level Shifter

The RS422 level shifter converts the signals provided by the FT2232H into the voltage levels required by

RS422 devices.

Dual DE-9P Connector (Male)

The DE-9P connector is configured in an industry standard (TIA/EIA-574) pin-out to provide connection to

RS422 peripherals through standard cables. See section 3.1.2

v x FTDI Chip .: FT_000135 2 Datasheet Version 1.2 Clearance No.: FTDI#103 Baud Rates Configuring W232R W2232 and FI'Z3ZBM

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

1.4 Features

Adds dual RS-422 serial port by connecting to a USB 2.0 Hi-Speed interface.

Easy plug & play installation and RS-422 device connection

Works with USB 1.1 & 2.0 Host and Hub ports

Industry Standard FTDI chip set & device drivers for maximum compatibility

Microsoft Windows® WHQL-certified, Mac OS X, Linux and Windows CE device drivers

Installs as a standard Windows COM port

COM port number can be changed to any available COM port number, to support HyperTerminal,

or any other serial communications software application running in Windows

Supports Windows Server 2008, 2003, Vista, XP, 2000, Windows CE, Linux, Mac OS X

FIFO: 4K byte transmit buffer, 4K byte receive buffer

RS-422 data signals: TxD+, TxD-, RxD+, RxD-, RTS+, RTS-, CTS+, CTS-, GND

Powered by USB port. No external power adapter required.

Serial port speed up to 10Mbps

Serial Communication Parameters

o Parity: None, Even, Odd

o Data bits: 7, 8

o Flow control: RTS/CTS , X-ON/X-OFF, None

Two DE-9P male connector

LEDs indicate USB Enumeration, RxD, TxD for monitoring port status & easy diagnostics

Operating temperature of -40°C to +85°C

1.5 Performance Figures

Parameter

Performance

USB Interface

480Mbps USB 2.0 High-Speed

RS422 Interface

Standard Windows baud rates (300bps to 921.6Kbps)

Custom baud rates (300bps to 10Mbps) through baud rate aliasing.

See FTDI Application Note: Configuring FT232R, FT2232 and FT232BM

Baud Rates

Max Cable Length

USB=5m, RS422=12m (for 10Mbps)

Table 1.2 - Performance Figures

Part Number

Description

USB-COM422-Plus2

USB-COM-Plus Hi-Speed USB to dual-Port RS422 module

Table 1.3 - Ordering Information

7- FTDI .: FT_000135 2 Datasheet 4 _ Chlp Version 1.2 Clearance No.: FTDI#103 ,u-«n.

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

1 Introduction ................................................................................... 1

1.1 Functional Description .................................................................................. 1

1.2 LED Description ............................................................................................. 2

1.3 Block Diagram ............................................................................................... 2

1.3.1 Block description ....................................................................................... 2

1.4 Features ........................................................................................................ 3

1.5 Performance Figures ..................................................................................... 3

2 Installation ..................................................................................... 6

2.1 Example Applications and Configurations ..................................................... 6

2.1.1 Wiring ...................................................................................................... 6

2.2 Device Driver Installation ............................................................................. 7

2.2.1 Microsoft Windows ..................................................................................... 7

2.2.2 Mac OS X, Linux, Windows CE ................................................................... 12

3 Connections .................................................................................. 13

3.1 External Connectors .................................................................................... 13

3.1.1 USB ....................................................................................................... 13

3.1.2 RS422 .................................................................................................... 13

4 Electrical details ........................................................................... 14

4.1 USB ............................................................................................................. 14

4.2 RS422 ......................................................................................................... 14

5 Mechanical Details ........................................................................ 15

5.1 Module Mechanical Dimensions ................................................................... 15

6 Physical Environment Details ....................................................... 16

6.1 Storage ....................................................................................................... 16

6.2 Operating .................................................................................................... 16

7 Environmental Approvals & Declarations ...................................... 17

7.1 EMI Compatibility ........................................................................................ 17

7.2 Safety.......................................................................................................... 17

7.3 Environmental ............................................................................................. 17

7.4 Reliability .................................................................................................... 17

7.4.1 MTTF ..................................................................................................... 17

7.5 Import / Export Information ....................................................................... 18

8 Troubleshooting ........................................................................... 19

8.1 Hardware .................................................................................................... 19

8.2 Device Driver .............................................................................................. 19

9 Contact Information ..................................................................... 20

7- FTDI .: FT_000135 2 Datasheet 4 _ Chlp Version 1.2 Clearance No.: FTDI#103 ,u-«n.

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

10 Appendix A - List of Figures and tables......................................... 22

Appendix B - Revision History ............................................................ 23

FTDI moons 2 Datasheet chip Version 1.2 Clearance No.: FTDI#103

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

2 Installation

2.1 Example Applications and Configurations

2.1.1 Wiring

Insert the A-plug into an available USB Host or Hub port. Insert the mini-B-plug into the USB mini-B-

receptacle on the USB-COM422-PLUS2.

The USB-COM422-Plus2 follows EIA-422 standard as a Data Terminal Equipment (DTE) device. If the

RS422 equipment being connected is a Data Communication Equipment (DCE) device, it’s typical that a

straight-through cable can be used.

DTE Pin Number

Signal Name

Expected Connect Signal

1

TXD- = Transmit Data,

negative polarity

RXD-

2

TXD+ = Transmit Data,

positive polarity

RXD+

3

RXD+ = Receive Data,

positive polarity

TXD+

4

RXD- = Receive Data,

negative polarity

TXD-

5

GND = signal ground

GND

6

RTS- = Request To Send,

negative polarity

CTS-

7

RTS+ = Request To Send,

positive polarity

CTS+

8

CTS+ = Clear To Send,

positive polarity

RTS+

9

CTS- = Clear To Send,

negative polarity

RTS-

Table 2.1 – RS422 DTE to DCE connection with straight-through cable

Some serial devices may require certain handshake signals to be connected. Refer to your device manual

for cabling details.

’" FTDI :. Chip I"""l .: FT_000135 2 Datasheet Version 1.2 Clearance No.: FTDI#103 on Executable shown on Windows XP jg Found New Hardware x Vour new hardware is installed and ready to use, W ndows Update shown on W dows XP mm Naw Hamwar- wmm Welcome m me Found New H ardware szard WWW Wu uamh An award as waders»! mm- by \nngmyum mm an we hidwavurlH‘ahmED,uon Mew”. UPda‘eWm .u WW ”mm W tam/mum mnnam Wham Updare m mm» w “my 01:: mmennu we: nnwandevwnm‘ cnnneuame on“ m mm um um a cumm-

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

2.2 Device Driver Installation

The USB-COM422-PLUS2 module drivers are available for download from:

www.ftdichip.com

2.2.1 Microsoft Windows

With the device drivers being Windows Hardware Quality Labs (WHQL) certified, they are also available

through download directly from the Microsoft® Windows® Update service. This is the best choice when

connecting the USB-COM422-PLUS2 to a computer running Windows Vista. Additional installation options

are noted below:

Installation Executable shown on Windows XP

1) Login to your system as Administrator, or a user with Administrator rights.

2) Prior to connecting the USB-COM422- PLUS2 to the USB Host or Hub port, download the latest

device driver version from the FTDIChip web site.

3) Run this executable to install the device drivers.

4) Connect the USB-COM422-PLUS2 to your computer. A notification will appear near the task bar

indicating that new hardware has been installed and is ready for use. It is normal if this notice

appears twice.

Figure 2.1 - Hardware Ready

Windows Update shown on Windows XP

You must have an active Internet connection and the Windows Update Service enabled.

1) Connect the USB-COM422-PLUS2 to your USB Host or Hub.

2) The “Found New Hardware” Wizard will appear. The first dialog should ask whether it is

acceptable to use the Windows Update Service to find the device driver.

Figure 2.2 – Found New Hardware Wizard

3) Select one of the “Yes” choices and click “Next”.

4) The following screen appears:

m: mam My: you man :oﬂwavelm usn Dev-:2 3) n yum hidwi: cine ni|h m Inmllalinn u) {a or ﬂoppy dilk, imml it now. What do yuu wanl lha mud Io am Gimme imagamaamay [gnawing] o 1.»me hum .qu u 3min: \ucehun [Advancad] tick Next to cunlma ruunn New Hardware Wizard Please wall mm m wizard sealches, a usa <> Seua‘ Eab‘e :cm‘ Fuuml New Hardware wumm Complehng (he Found New Hardware leard m: w‘zavd m mm mum m: wﬂwav: m usE sm‘ [Wm 32> Ehck Fxmsh m c‘ase me mm (M cam. .: FT_000135 2 Datasheel Version 1.2 ' FTDI#103

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

Figure 2.3 – Automatic Install

5) Wait while the driver is found, downloaded, and installed. This step may take a couple minutes.

6) After the files are found and installed, click “Finish” to complete the installation.

Figure 2.4 - Complete Hardware Installation

7) Steps 2 through 6 will repeat. The first time installs the basic USB Serial Converter in the USB

device tree. The second time installs the Virtual COM Port layer in the Ports tree and assigns the

COM port number.

8) When both portions of the device driver have been installed successfully, the following message

will appear, indicating that the device is ready.

.: FT_000135 2 Datasheel Version 1.2 Clearance "0.: FTDI#103 jg Found New Hardware x Vour new hardware is installed and ready to use. COM Part Assignment 5. Dawn: Manager ax: Man w M b * EEI § EE - Eakkaﬂas . B‘uelnnth Rams . 31 mm, . g, stkdees . g Dwiv‘ayadaptevs . ‘IIDVD/CD-ROMdv-ves o 3% Humanlntevlnnzwtes . a ma AVA/Mm mnthevs . {115551394 am m mntvaHevs . ,xmawngaevm o J Klvbuavdi " Mme and ether Wntmq dewces Mamtms II Netwmkadwfas J vans (com am) e Pmtessms o Saund, mane-d game mnthevs SVstem dewzs Unwevsa‘ Senal Bus mntvaHevs

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

Figure 2.5 - Hardware Ready

COM Port Assignment

Next, to determine which COM port has been assigned, open the Windows Device Manager from the

System Control Panel.

Figure 2.6 - Device Manager

Click on the Plus “+” sign next to the Ports tree and Universal Serial Bus controllers tree to list the

available USB device. You will see two additional “USB Serial Port”, followed by a COMn assignment.

And two additional “USB Serial Converter A” and “USB Serial Converter B”.

FTDI em 2 Datasheel Chip Version 1.2 Clearance "0.: FTDI#103 ,+. - Network adapters ‘ Q NV!DIA Network Bus Enumerator 2 F9 ports (COM sum) 3 Communications Port (com) ' Communications Port (COM2) L ‘ rl ] l g; USB Serial Port (com 1) Q Processors 0 Sound, video and game controllers s ' System devices — 3 universal Serial Elus controllers Generic LISB Hub standard Enhanced PC! to USB Host Controller Standard OpenHCD USE Host Controller USB Composite Device USB Root Hub USB Ruck Hub USB 5eriai Converter A USB 5eriai Converter 3 053 mm... mm, We“, 3 Lisa M. pm. {com . , Wm Genaai PallSelllngsH one ll neiaix; aenevai ‘PnllSeﬂlngs‘ one 1 Delails g usa Seiial Pan manual 3 usa Sena PnillEUMH] Devi-2: Kw? ram [BUM r mi Devcelyne PniileDM mil redeem" FYDl Mamie-:luisr FlDl Lacainn rm HSB Sellal EamenelA anallm an usa SalalEnnvelielB Dzvlre sidus Devi-2: slams thsdevlce i; wulklrlg Dmvzily in: device lswuklhgvlwel‘y Wm alehavlng plaﬂems Mm ms dewce, clcklmuhlethl in V yauai: havngplnhlemx Wm momeoimr Vlmhbshau in gel Ah: lmublthmlzi xi." lh: limbbxhudzi Tinuhlethi Vlwhlzshad am: we 7 om We (Us: ihls device [motile] ‘Uselhlx miteierooei v

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

Figure 2.7 - COM Port and USB Device name Assignment

To determine which COM port has been assigned to Converter A or B, the cursor point to the USB Serial

Port (COM10) or (COM11), then right-click on it and select “Properties”, it shows their relationship to the

Converter A or B.

In the figure below, the Converter A is assigned to COM10, Converter B is assigned to COM11.

Figure 2.8 - COM Port Assignment and Proterties

Use this COM port number with your application software in order to access the USB-COM422-PLUS2.

If an application requires use of a different COM port number, the assignment may be changed through

the Advanced Driver Options settings.

From the above “Properties”, click on the “Port Settings” tab.

7".— FTDI .: FT_000135 2 Datasheet 5“. Chlp Version 1.2 Clearance No ' FTDI#103 i/ USB 82 {Pull lCOMIO] Pmpe 25 General Pans; ngs ‘Duyelr Demié BMW-WW“ — v‘ Dela M: 13 v Pally Rama 7 Slap m: ‘1 v Fluw cunlw‘ {Name v nmom

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

Figure 2.9 - Settings Tab

Advu cad Semngs lm Como com Pm Mum — v usa Ivansfev Size; Select \nwer semngs to mnect nevfarmance Dmblems at m baud rates. Sebct hugha settings far faster parﬁmuanze. RECEIVE (B‘AES): WEE V WEE v Transnut (BYte BM ODtIuns Salad \awev sums to correct vesnunse Dmb‘ems‘ Latency mm (mm) 15 v 1mm; Mmmum Reed ﬁmeout (msec): n ‘ < mmmum="" wm="" rmuut="" (inset):="" mrsceﬁaneuus="" ovtmns="" ssnal="" eruvvavalm="" senal="" pvntsv="" cancel="" if="" powev="" off="" event="" on="" surnns:="" ruhr/3‘="" sat="" rts="" on="" dose="" dbsd)‘:="" modem="" ctvl="" a:="" sum»="" defauls="" iih="" e!="" e!="" e]="" e]="" el="" .:="" ft_000135="" 2="" datasheet="" version="" 1.2="" clearance="" "0.:="" ftdi#103="">

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

Then click on the “Advanced…” button.

Figure 2.10 - Advanced Options

This will display the various advanced settings. Note the COM port assignment in the upper left. Clicking

on the drop-down list will display the available port numbers. Select one that is not in use and click OK

on each dialog box to activate the selection. Windows will remember this COM port number.

2.2.2 Mac OS X, Linux, Windows CE

Device drivers and FTDI installation guides for Mac OS X, Linux and Windows CE are available for

download on the FTDIChip web sites. Follow the respective FTDI installation guides for the chosen

operating system.

1" FTDI .: FT_000135 2 Datasheet Chip Version 1.2 Clearance No.: FTDI#103 v'

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

3 Connections

3.1 External Connectors

3.1.1 USB

The USB-COM422-PLUS2 is a downstream USB 2.0 Device. A standard USB mini type “B” receptacle is

mounted inside the USB-F-1001 to facilitate connection to an upstream USB Host or Hub.

Pin Number

Pin Type

Description

1

Power

VBUS = USB Power provided from upstream USB Host or Hub

2

Bidirectional

D– = USB data signal, negative polarity

3

Bidirectional

D+ = USB data signal, positive polarity

4

ID

No connected

5

Ground

GND = USB signal ground

Shield

Case Ground

Drain = typically connected to the host PC case

Table 3.1 – USB mini type "B" Receptacle Pin-Out

3.1.2 RS422

Both RS422 ports are configured as Data Terminal Equipment (DTE), with a 9-contact D-Sub Pin

connector. Pin assignments are according to TIA/EIA-422. Both Connectors are the same pin-out.

Pin Number

Pin Type

Description

1

Output

TXD- = Transmit Data, negative polarity

2

Output

TXD+ = Transmit Data, positive polarity

3

Input

RXD+ = Receive Data, positive polarity

4

Input

RXD- = Receive Data, negative polarity

5

Ground

GND = signal ground

6

Output

RTS- = Request To Send, negative polarity

7

Output

RTS+ = Request To Send, positive polarity

8

Input

CTS+ = Clear To Send, positive polarity

9

Input

CTS- = Clear To Send, negative polarity

Table 3.2 – DE-9P RS422 Pin-Out

1" FTDI .: FT_000135 2 Datasheet \ _ Chlp Version 1.2 Clearance No.: FTDI#103 ,t"“l.

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

4 Electrical details

4.1 USB

Parameter

Description

Minimum

Typical

Maximum

Units

Conditions

USB_VCC

Input Power Voltage*

4.25

5.0*

5.25

V

*Present when USB

cable is attached and

USB Host or Hub

powered.

Icc

USB current

30

50

mA

Table 4.1 - USB Electrical Details

4.2 RS422

Parameter

Description

Minimum

Typical

Maximum

Units

Conditions

Vtrans

Transmitter output

voltage swing

2

V

RL = 50R CL = 50pF

Vrec

Receiver input voltage

range

-7

+12

V

RL = 50R CL = 50pF

ESD HBM

N/A

±15

KV

For all RS-422 Inputs

and Outputs pin

Table 4.2 – RS422 Electrical Details

.: FT_000135 2 Datasheet Version 1.2 Clearance No.: FTDI#103 (this indudes the tails of the D-type connectors soldered pins)‘ Mounting holes are 5mm in diameter. |:l|:l “lag: 'd D SO. 00 71.50 18. 00 4.70 USB-COM422-PLUSZ mm PORT ﬂ PORT B 07° us. m w ' 84.58 0 D o . 0° . 0° 0 mm 0 a 0 m .._. O O . N . O O o «r ”’07 ' 00 "u. 00 ”1 V N m . . . . z N» u . u z m I I - v I}? z | 1‘ 6. o. w v a on <- :1="" :4="" ”w="" —="" a="" b="" w="" o="" m="" .="" “‘="" .mm="" l].="" n22="" i="" g="" g=""><_)l nu="" ‘="" 1k="" bx="" m="" ‘="" ix="" rx="" '3'="" v="" 445="" an?="" i="" uopur="" max="" 19="" no="" 1145‘="" no="" 19="" \ii="" -—’n="" m="" #31.="" 83—){4="" 52.="" 27="" 5613="" 60.="" 27="" 76.59="" 80.45="">

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

5 Mechanical Details

5.1 Module Mechanical Dimensions

Dimensions are in mm. The PCB height is dominated by the D-type connectors and is 17mm +/- 2mm

(this includes the tails of the D-type connectors soldered pins). Mounting holes are 5mm in diameter.

Figure 5.1 - USB-COM422-PLUS2 PCB Dimensions

y" FTDI .: FT_000135 2 Datasheet Chip Version 1.2 Clearance No.: FTDI#103

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

6 Physical Environment Details

6.1 Storage

Parameter

Description

Minimum

Typical

Maximum

Units

Conditions

T

Storage Temperature

Range

-65

+150

oC

Table 6.1 - Storage Temperature

6.2 Operating

Parameter

Description

Minimum

Typical

Maximum

Units

Conditions

T

Operating Temperature

Range

–40

+85

oC

5% to 95% RH,

non condensing

Table 6.2 - Operating Temperature

FTDI moons 2 Datasheet chip Version 1.2 Clearance No.: FTDI#103

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

7 Environmental Approvals & Declarations

7.1 EMI Compatibility

FCC and CE

The USB-COM422-PLUS2 has been tested to be compliant with both FCC Part 15 Subpart B and European

EMC Directive.

NOTE: This is a Class B product. In a domestic environment, this product may cause radio interference,

in which case the user may be required to take adequate measures.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device,

pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against

harmful interference in a residential installation. This equipment generates uses and can radiate radio

frequency energy and, if not installed and used in accordance with the instructions, may cause harmful

interference to radio communications. However, there is no guarantee that interference will not occur in a

particular installation. If this equipment does cause harmful interference to radio or television reception,

which can be determined by turning the equipment off and on, the user is encouraged to try to correct

the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different from that to which the receiver is

connected.

Consult the dealer or an experienced radio/TV technician for help.

7.2 Safety

The USB-COM422-PLUS2 is defined as Limited Power Supply (LPS) device, with operating voltages under

60VDC.

7.3 Environmental

The USB-COM422-PLUS2 is a lead-free device that complies with the following environmental directives:

RoHS, WEEE, REACH, PFOS and DecaBDE.

7.4 Reliability

The USB-COM422-PLUS2 is designed as a robust USB-Serial module for use in many environments.

There are no user-serviceable parts. Any failure will require a replacement of the unit.

7.4.1 MTTF

The Mean Time To Failure is calculated at TBD hours.

FTDI .: FT_000135 . 2 Datasheet Chlp Verslon 1.2 Clearance No.: FTDI#103 v \

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

7.5 Import / Export Information

Import / Export Information

Country of Origin

China

Harmonized Code

TBD

Product Description

USB to RS422 Development Module, Single Port

USA ECCN

EAR99 – No License Required

Table 7.1 - Import / Export Information

I'- FTDI .: FT_000135 2 Datasheet _ _ Chlp Version 1.2 Clearance No.: FTDI#103 ,a““l. .com Documents InstallGuides. htm - DEVICE TIMES OUT - ERRATIC MOUSE POINTER - COM PORT IN USE htt Ftd m Documents InstallGu es tm

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

8 Troubleshooting

8.1 Hardware

Cables are the most common sources of trouble with external devices.

Check the following:

- USB cable is properly inserted at both ends

- Computer power is ON

- Computer is not in Sleep or Standby

- If a USB Hub is used, be sure it is set for “Self-Powered” operation

- If a USB Hub is used, be sure all cables are properly inserted

- If all the above are OK, the Yellow LED should be lit, indicating the device has been recognized by the

USB subsystem.

RS422 cables – check the following:

- Output signals (TXD+, TXD-, RTS+, RTS-) are connected to the respective inputs (RXD+, RXD-,

CTS+, CTS-) in each direction.

- Check for specific handshake requirements of your RS422 peripheral.

- If handshake signals are not used, ensure the application is set to “No Hardware Handshake”, or

equivalent.

- Test the port with a loop-back connector. Connect TXD+ to RXD+, TXD- to RXD-, RTS+ to CTS+ and

RTS- to CTS-. Use a simple terminal program to check that data is transmitted and received.

8.2 Device Driver

Ensure the latest device driver is in use. See www.ftdichip.com

If other devices with FTDI chips are installed in the system, check with all manufacturers of these devices

for the latest device drivers.

See the FTDI installation guides for additional details: http://ftdichip.com/Documents/InstallGuides.htm

Common Windows Device Driver Troubles:

DEVICE TIMES OUT: The default settings of the device driver assume typical data transfers of

hundreds to thousands or more bytes at a given time. Some applications, such as a GPS device,

only send data in short packets, often only a few bytes. If this is the case, it may be necessary

to adjust the driver buffer size and/or latency timer to smaller values. These values can be

adjusted through the Advanced driver options as noted in Figure 2.13. The buffer size can be

reduced to 64 bytes. The latency timer can be set as low as 2ms. A setting of 1ms will cause

unnecessary USB traffic and could adversely affect data transmission.

ERRATIC MOUSE POINTER: The device driver defaults to query an attached device to find out

whether it is a mouse or modem, consistent with native COM port operation. Some RS422

peripherals constantly send short packets of data, causing the host system to “think” a mouse or

modem has been attached. These short packets will interfere with normal mouse operation

causing the pointer to jump around the screen. If this happens, disconnect the RS422 device and

uncheck the Serial Enumerator option, also found on the Advanced driver options screen in Figure

2.13.

COM PORT IN USE: Windows keeps track of all COM port assignments. If multiple FTDIChip

products have been connected to a single system, the COM port number will increase, even if the

other devices are not attached. If the higher COM port assignments are not acceptable for the

application, known unused COM port numbers should be uninstalled according to the FTDI

installation guide: http://ftdichip.com/Documents/InstallGuides.htm.

FTD' -=:;=.2:::;i Chip Version 1.2 Clearance "0.: FTDI#103 salesl©ftdichi9.com suggertletdichiQLom admileftdichip.com htt : wwwftdichi .com htt : wwwftdichi .com tw.salesl@ftdichip.com tw‘supportl @ftdwchipxom tw.admin1@ftdich\g‘com htt : www‘ftdichw ‘com cn.sales@ftdich\g‘com cmsupporthtdichigcom cn.admm1@ftdichip.com htt : www‘ft chw .com us.sales@ftd\chip.com us.5upport@ftdich\g‘com u5.admm@ftd\chip.com htt : www‘ftdichw ‘com

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

9 Contact Information

Head Office – Glasgow, UK

Future Technology Devices International Limited

Unit 1, 2 Seaward Place, Centurion Business Park

Glasgow G41 1HH

United Kingdom

Tel: +44 (0) 141 429 2777

Fax: +44 (0) 141 429 2758

E-mail (Sales) sales1@ftdichip.com

E-mail (Support) support1@ftdichip.com

E-mail (General Enquiries) admin1@ftdichip.com

Web Site URL http://www.ftdichip.com

Web Shop URL http://www.ftdichip.com

Branch Office – Taipei, Taiwan

Future Technology Devices International Limited (Taiwan)

2F, No 516, Sec. 1 NeiHu Road

Neihu District

Taipei 114

Taiwan, R.O.C.

Tel: +886 (02) 8797 1330

Fax: +886 (02) 8751 9737

E-mail (Sales) tw.sales1@ftdichip.com

E-mail (Support) tw.support1@ftdichip.com

E-mail (General Enquiries) tw.admin1@ftdichip.com

Web Site URL http://www.ftdichip.com

Branch Office – Shanghai, China

Future Technology Devices International Limited (China)

Room 408, 317 Xianxia Road,

ChangNing District,

ShangHai, China

Tel: +86 (21) 62351596

Fax: +86(21) 62351595

E-Mail (Sales): cn.sales@ftdichip.com

E-Mail (Support): cn.support@ftdichip.com

E-Mail (General Enquiries): cn.admin1@ftdichip.com

Web Site URL: http://www.ftdichip.com

Branch Office – Hillsboro, Oregon, USA

Future Technology Devices International Limited (USA)

7235 NW Evergreen Parkway, Suite 600

Hillsboro, OR 97123-5803

USA

Tel: +1 (503) 547 0988

Fax: +1 (503) 547 0987

E-Mail (Sales) us.sales@ftdichip.com

E-Mail (Support) us.support@ftdichip.com

E-mail (General Enquiries) us.admin@ftdichip.com

Web Site URL http://www.ftdichip.com

7- FTDI .: FT_000135 2 Datasheet 4 _ Chlp Version 1.2 Clearance No.: FTDI#103 ,u-«n.

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

Distributor and Sales Representatives

Please visit the Sales Network page of the FTDI Web site for the contact details of our distributor(s) and

sales representative(s) in your country.

7- FTDI .: FT_000135 2 Datasheet 4 _ Chlp Version 1.2 Clearance No.: FTDI#103 ,u-«n.

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

10 Appendix A - List of Figures and tables

List of Figures:

Figure 1.1 USB-COM422-Plus2 ....................................................................................................................... 1

Figure 1.2 USB-COM422-PLUS2 Block Diagram .......................................................................................... 2

Figure 2.1 - Hardware Ready .......................................................................................................................... 7

Figure 2.2 – Found New Hardware Wizard .................................................................................................... 7

Figure 2.3 – Automatic Install ......................................................................................................................... 8

Figure 2.4 - Complete Hardware Installation ................................................................................................ 8

Figure 2.5 - Hardware Ready .......................................................................................................................... 9

Figure 2.6 - Device Manager ........................................................................................................................... 9

Figure 2.7 - COM Port and USB Device name Assignment ....................................................................... 10

Figure 2.8 - COM Port Assignment and Proterties ..................................................................................... 10

Figure 2.9 - Settings Tab ............................................................................................................................... 11

Figure 2.10 - Advanced Options ................................................................................................................... 12

Figure 5.1 - USB-COM422-PLUS2 PCB Dimensions .................................................................................. 15

List of tables:

Table 1.1 – LED Description ........................................................................................................................... 2

Table 1.2 - Performance Figures .................................................................................................................... 3

Table 1.3 - Ordering Information .................................................................................................................... 3

Table 2.1 – RS422 DTE to DCE connection with straight-through cable ................................................... 6

Table 3.1 – USB mini type "B" Receptacle Pin-Out .................................................................................... 13

Table 3.2 – DE-9P RS422 Pin-Out ................................................................................................................. 13

Table 4.1 - USB Electrical Details ................................................................................................................. 14

Table 4.2 – RS422 Electrical Details ............................................................................................................ 14

Table 6.1 - Storage Temperature .................................................................................................................. 16

Table 6.2 - Operating Temperature .............................................................................................................. 16

Table 7.1 - Import / Export Information ........................................................................................................ 18

7- FTDI .: FT_000135 2 Datasheet 4 _ Chlp Version 1.2 Clearance No.: FTDI#103 ,u-«n.

Document Reference No.: FT_000135

USB-COM422-PLUS2 Datasheet

Version 1.2

Clearance No.: FTDI#103

Appendix B - Revision History

Version Draft First Draft 06 July 2009

Version 1.0 First Release 27 August 2009

Version 1.1 Edited Section 1.3.1, Removed the statement

“A standard “A to B” cable is provided” 12th April 2010

Version 1.2 Added more details to dimensions drawing 6th May 2011

Datenblatt für USB-COM422-Plus-2 von FTDI, Future Technology Devices International Ltd

INFORMATION

HILFE

KONTAKT

FOLGEN SIE UNS