USB-COM485-PLUS2 Datasheet
Contents
1. Future Technology Devices International Ltd USB COM485 PLUS2 CC Fe Datasheet Document Reference No FT_000136 Version 1 2 Issue Date 2010 04 12 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 supporti 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 product 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 Uniti 2 Seaward Place Centurion Busin2. 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 RS485 cables check the following Check for specific handshake requirements of your RS485 peripheral Because there are no handshake signals ensure the application is set to No Hardware Handshake or equivalent Test the port with a loop back connector Connect DATA to DATA DATA to DATA 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 e 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 time
3. 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 Copyright 2010 Future Technology Devices International Limited 11 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 3 Connections 3 1 External Connectors 3 1 1 USB The USB COM485 PLUS2 is a downstream USB 2 0 Device A standard USB mini type B receptacle is mounted inside the USB COM485 PLUS2 to facilitate connection to an upstream USB Host or Hub Pin Number Pin Type Description VBUS USB Power provided from upstream USB Host or Hub Bidirectional D USB data signal negative polarity Table 3 1 USB mini type B Receptacle Pin Out Copyright 2010 Future Technology Devices International Limited 12 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 3 1 2 RS485 The RS485 ports are configured as Data Terminal Equipment DTE with a 9 contact D Sub Pin connector Pin assignments are according to TIA EIA 485 In addition pin9 of DB9 provides 5VDC to an external device with a maximum current draw of 450mA once the USB COM485 PLUS2 has been enumerated by the system Both
4. Appendix B Revision FISCOlY usuzuzuzua 2 3 Copyright 2010 Future Technology Devices International Limited 5 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 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 COM485 PLUS2 DTE Pin Number Signal Name Expected Connect Signal DATA Transmit Receive DATA Data negative polarit ae er op ona Pin 2 of 120R Terminating Resistor Only Required if the USB Also Terminator 2 COM485 PLUS2 is the first or last device in a multi drop RS485 System to meet RS485 Termination Requirements DATA Transmit Receive Data positive polarity Terminator 1 Pin 1 of 120R Terminating Resistor Only Required if the USB COM485 PLUS2 is the first or last device in a multi drop RS485 CS EE to meet RS485 Termination Requirements GND signal ground echo enable terminal 1 Local echo function control Connect to pin 8 can disable the local echo function The local echo is enabled by default echo enable terminal 2 Local echo function control Connect to pin7 can disable the local echo function The local echo is enabled by default PWR 5V DC output Table 2 1 RS485 DTE to DCE connection CN 7 HT A felt A y H m i
5. C delen AD E 10 Figure 2 11 Advanced OD UO ING EEN 11 Figure 5 1 USB COM485 PLUS2 PCB Dimensions ss sssssssssssssss sss sss ssssss ennenen ennenen 15 List of tables Table N ER ee CEU e EE 2 Table 1 2 Performance te E 3 Table 1 2 lt Ordering Information EE 3 Table 2 1 RS485 DTE to DCE EE Eege 6 Table 3 1 USB mini type B Receptacle Pin Out ccsccccsssseeccesseeseesseeesoenseeeeeseeseoasseesoanseeseoanees 12 Table 3 2 DE 9P RS485 ue TU EE 13 Table 4 1 USB Electrical Dietaulg eegene 14 Table 4 2 RS485 Electrical TUE 14 Table 4 3 Power Output for USB COM485 PLUS2 wwwsumaamanaaan sese 14 Table 6 1 Storage Temperature EE 16 Table 6 2 Operating RK e EE d TEE 16 Table 7 1 Import Export rt Heger ee 18 Copyright 2010 Future Technology Devices International Limited 22 Appendix B Revision History Version Draft First Draft Version 1 0 First Release Version 1 1 Modified the description of Echo function Version 1 2 Edited Section 1 3 1 Removed the statement A standard A to B cable is provided Document Reference No FT_000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 6th July 2009 27th August 2009 25th January 2010 12 April 2010 Copyright 2010 Future Technology Devices International Limited 23
6. D type connectors have a similar connection as described in Table 3 2 1 DATA Input Output Pin 2 of 120R Terminating Resistor Only Required if the USB COM485 PLUS2 is the first or last device in a multi drop RS485 System to meet RS485 Termination Requirements 3 Input Pin 1 of 120R Terminating Resistor Only Required if the USB COM485 PLUS2 is the first or last device in a multi drop RS485 System to meet RS485 Termination Requirements em 7 Input Pin 7 of the local echo control Connect to pin 8 of the echo control to disable local echo Default is that local echo is enabled Output Connect to pin 7 of the echo control to disable local echo Default is that local echo is enabled Table 3 2 DE 9P RS485 Pin Out Copyright 2010 Future Technology Devices International Limited 13 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 4 Electrical details 4 1 USB Present when USB cable is attached and USB VCC Input Power Voltage l l USB Host or Hub powered Does not include power supplied to USB current external device connected to pin 9 of both ports Table 4 1 USB Electrical Details 4 2 RS485 Transmitter output RL 50R CL 50pF voltage swing Receiver input voltage RL 50R CL 50pF range For all RS 485 Inputs and Outputs pin Table 4 2 RS485 Electrical Details 4 3 Power Output The USB COM485 PLUS2 provides 5
7. INUX Windows CEA 11 S CONNGCUONS E Ee 3 1 External COMMCCUOES AAA 12 3 1 1 AI AWA T E YO MIM MANA E A NE cine nants TUU nere eae TTA T 12 3 1 2 KE II 13 4 Electrical detailS sssssssssssssssssssssssssss sassa sassa E 4 1 USB wince och aces casnavasrostecusceniecucensmavnseoussvue secs EE 14 4 2 NIISHI 14 4 3 POW COP DUDU AAA 14 5 Mechanical Details wawa LO 5 1 Module Mechanical DIMENSIONS s sss sss sss s sss ss sss KN KR sss sss sss saan nnn naaa asan RRR RR Raas 15 6 Physical Environment Details see ss sss KKK NEE KENE EE EE KK e uwen LO 6 1 DEON Le E 16 G 2 ODS AUING AAA 16 7 Environmental Approvals amp Declarations nek ss sss sss sss ss ss e ss ennen LJ 7 1 EMI COMP aU Oly x seta air R ER nE RR Ry KR BTR RER R ERRER RT R Heg RES 17 7 2 SAL CEV aiacusisicevecsiecscecusecsiscugwciivaswscukecusuulieeusvsul aa 17 7 3 ENVIFONMENC TEE 17 74 RNB EE 17 7 4 1 MELE III 17 7 5 Import Export Information sss sss sss sss sss sss sss ss sss sassa sannan sannan Ransa aas 18 S PEOUDISCSNOOUING THE LO 8 1 HardWare E 19 8 2 Device Bald EE 19 9 Contact Information BRB BRE RRR RRR RRR RRR RR RRR RRR RRR RRR RRR RRR RRR RR RRR RRR RRR RRR ee Ree eee eee eee R 20 Copyright 2010 Future Technology Devices International Limited 4 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 10 Appendix A List of Figures and tabDl6eS sssusussnsununanzuzunazza 22
8. If the Pm 7 connect ae z to Ping the Echo Xt DB 9M Figure 2 1 USB COM485 PLUS2 Termination resistor and echo disable Copyright 2010 Future Technology Devices International Limited 6 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 2 2 Device Driver Installation The USB COM485 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 COM485 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 COM485 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 COM485 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 D Found New Hardware Your new hardware is installed and ready to use Figure 2 2 Hardware Ready Windows Update shown o
9. OM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 7 Environmental Approvals amp Declarations 7 1 EMI Compatibility FCC and CE The USB COM485 PLUS2 has been tested to be compliant with both FCC Part 15 Subpart B and European EMC Directive CC 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 Ee 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 e Reorient or relocate the receiving antenna e Increase the separation between the equipment and receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected e Consult the dea
10. V DC for an external device that requires power on pin9 of DB9Y The maximum allowable current is 500mA including the circuitry of the USB COM485 PLUS2 itself Up to 450mA may be used by the external device The 5V output is only enabled when the USB interface is not in suspend USB interface is not in SUSPEND Output Power Current 250 mA This is total current between the 2 ports Table 4 3 Power Output for USB COM485 PLUS2 Copyright 2010 Future Technology Devices International Limited 14 FTDI Document Reference No FT_000136 USB COM485 PLUS2 Datasheet Chip Version 1 2 Clearance No FTDI 104 VJ A a WA 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 44 50 Figure 5 1 USB COM485 PLUS2 PCB Dimensions Copyright 2010 Future Technology Devices International Limited 15 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 6 Physical Environment Details 6 1 Storage Storage Temperature Range Table 6 1 Storage Temperature 6 2 Operating Operating Temperature 5 to 95 RH 40 85 E l Range non condensing Table 6 2 Operating Temperature Copyright 2010 Future Technology Devices International Limited 16 Document Reference No FT 000136 USB C
11. e e Two DE 9P male connector e LEDs indicate USB Enumeration RxD TxD for monitoring port status 8 easy diagnostics e Operating temperature of 40 C to 85 C e Echo and non Echo two modes can be selected 1 5 Performance Figures Performance 480Mbps USB 2 0 Hi Speed 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 RS485 12m at 10Mbps Table 1 2 Performance Figures RS485 Interface USB COM485 PLUS2 USB COM Plus Hi Speed USB to dual Port RS485 module Table 1 3 Ordering Information Copyright 2010 Future Technology Devices International Limited 3 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 E xv dv e Te Te Wa AA wauwawa 1 1 FUNGCHIONaAl adve d Le TN E 1 1 2 LED DES DU BEE 2 1 3 Block DIAGN cyex rss sv ype xx reg ss rss exx RKR gg RNK RRR RRR UR R NNE R UNE NK RRR KRN RRC NNE RN KR RR KRU KR SSK 2 123 1 Sete GESCrIDUION EE 2 1 4 wall 3 1 5 PEFOrimanCe FIGUI CS Ui 3 2 InstallatiOn ssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn D 2 1 Example Applications and Configurations ssss sss sss sss sss sss sss sss s sss sss sss sss sss assan sss 6 2 1 1 Tel ul EE D 2 2 Device Driver EEN CHE d e E 7 2 2 1 alese deele E 7 2 2 2 Mac OS X L
12. e USB COM485 PLUS2 to a legacy RS485 peripheral device Copyright 2010 Future Technology Devices International Limited 1 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 1 2 LED Description The USB COM485 PLUS2 uses three LEDs to indicate a valid link as well as data traffic according to the following table LED Colour Function Description Yellow x 1 ON when USB COM485 PLUS2 is configured and ready Red x 2 TxD Activit Flashes when data is transmitted from the USB COM485 PLUS2 to the es T attached RS485 device G gt RxD Activit Flashes when data is transmitted from the attached RS485 device to the daal Y USB COM485 PLUS2 Table 1 1 LED Description 1 3 Block Diagram RS485 DE 9P Level Shifter Connector Channel A ES USB B FTDI FT2232H Client LZ gt a Hi Speed USB Serial Connector Channel B KZN RS485 DE 9P Level Shifter Connector Figure 1 2 USB COM485 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 RS485 Level Shifter The RS485 le
13. ess Park Glasgow G41 1HH United Kingdom Scotland Registered Number SC136640 Copyright 2010 Future Technology Devices International Limited FTDI Document Reference No FT_000136 x USB COM485 PLUS2 Datasheet Chip Version 1 2 Clearance No FTDI 104 1 Introduction 1 1 Functional Description The USB COM485 PLUS2 is a USB to a dual interface RS485 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 RS485 interface to USB USB COM485 PLUS2 is a USB to a dual port RS485 adapter The integrated electronics of the USB COM485 PLUS2 utilise the FTDI FT2232H and includes RS485 level shifters plus TXD RXD LEDs to provide a visual indication of data traffic through the module USB COM485 PLUS2 Rev 1 1 R17 Tu amp PWR Figure 1 1 USB COM485 PLUS2 The module uses a standard USB B device connector for connection to an upstream host or hub port RS485 level signals are available on an industry standard DE 9P connector The maximum RS485 level data rate is 10Mbps The USB COM485 PLUS2 module requires USB device drivers available free from www ftdichip com which are used to make the USB COM485 PLUS2 appear as a Virtual COM Port VCP This allows existing serial communications software such as HyperTerminal to exchange data through th
14. ler or an experienced radio TV technician for help 7 2 Safety The USB COM485 PLUS2 is defined as Limited Power Supply LPS device with operating voltages under 60VDC 7 3 Environmental The USB COM485 PLUS2 is a lead free device that complies with the following environmental directives RoHS WEEE REACH PFOS and DecaBDE 7 4 Reliability The USB COM485 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 Copyright 2010 Future Technology Devices International Limited 17 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 7 5 Import Export Information Import Export Information Product Description USB to RS485 Development Module Dual Port USA ECCN EAR99 No License Required Table 7 1 Import Export Information Copyright 2010 Future Technology Devices International Limited 18 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 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
15. n Windows XP You must have an active Internet connection and the Windows Update Service enabled 1 Connect the USB COM485 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 Found New Hardware Wizard Welcome to the Found New Hardware Wizard Windows will search for current and updated software by looking on your computer on the hardware installation CD or on the Windows Update Web site with your permission Read our privacy policy Can Windows connect to Windows Update to search for software Yes now and every time connect a device O No not this time Click Next to continue Figure 2 3 Found New Hardware Wizard 3 Select one of the Yes choices and click Next 4 The following screen appears Copyright 2010 Future Technology Devices International Limited 7 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 This wizard helps you install software for USB Device If your hardware came with an installation CD WA or floppy disk insert it now What do you want the wizard to do O Install from a list or specific location Advanced Click Next to continue Figure 2 4 Automatic Install 5 Wait while the driver is found downloaded and installed This step may take a couple minute
16. om E mail Support supporti ftdichip com E mail General Enquiries admini 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 salesi ftdichip com E mail Support tw support1 ftdichip com E mail General Enquiries tw admini 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 Copyright 2010 Future Technology Devices International Limited Document Reference No FT_000136 USB COM485 PLUS2 Datasheet Ver
17. ough the Advanced Driver Options settings From the above Properties click on the Port Settings tab USB Serial Port COM10 Properties Am ee General Port Settings Driver Details Parity Stop bits Bits per second t D ata bits Flow control None Restore Defaults Figure 2 10 Settings Tab Then click on the Advanced button Copyright 2010 Future Technology Devices International Limited 10 FTDI Document Reference No FT_000136 USB COM485 PLUS2 Datasheet Chip Version 1 2 Clearance No FTDI 104 Advanced Settings for COM10 COM pant Number E OK USB Transfer Sizes Cancel Select lower settings to correct performance problems at low baud rates Defaults Select higher settings for Faster performance Receive Bytes 4096 v Transmit Bytes 4096 v BM Options Miscellaneous Options Select lower settings to correct response problems Serial Enumerator Serial Print Latency Timer msec 16 v i La L Cancel IF Power Off C Uan Event On Surprise Removal 4 Minimum Read Timeout msec lo v Set RTS On Close C Minimum Write Timeout msec F a Disable Modem Ctrl At Startup L Figure 2 11 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
18. r can be set as low as 2ms A setting of 1ms will cause unnecessary USB traffic and could adversely affect data transmission e 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 RS485 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 RS485 device and uncheck the Serial Enumerator option also found on the Advanced driver options screen in Figure 2 13 e 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 Copyright 2010 Future Technology Devices International Limited 19 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 c
19. s Found New Hardware Wizard Please wait while the wizard searches Pa Wa S c USB lt gt Serial Cable S d kd 6 After the files are found and installed click Finish to complete the installation Found New Hardware Wizard Completing the Found New Hardware Wizard The wizard has finished installing the software for USB Serial Converter Click Finish to close the wizard Finish Figure 2 5 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 A ij Found New Hardware Your new hardware is installed and ready to use Figure 2 6 Hardware Ready Copyright 2010 Future Technology Devices International Limited 8 ET FTDI Document Reference No FT_000136 x USB COM485 PLUS2 Datasheet N Chip Version 1 2 ge Clearance No FTDI 104 COM Port Assignment Next to determine which COM port has been assigned open the Windows Device Manager from the System Control Panel Device Manager File Action View Help H CG m EA Wl Batteries Bluetooth Radios 1 d Computer See Disk drives E Display adapters 4 DVD CD ROM dri
20. sion 1 2 Clearance No FTDI 104 20 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 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 Copyright 2010 Future Technology Devices International Limited 21 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 10 Appendix A List of Figures and tables List of Figures Figure 1 1 CSC OMe GR arose eee 1 Figure 1 2 USB COM485 PLUS2 Block Diagram cccccseeesseeeeeeeeeeeeeeeeneeeeeeeeeeceessneeeeeeeeeooeesseeeeeesseoonennes 2 Figure 2 1 USB COM485 PLUS2 Termination resistor and echo disable cccseeeeeeessseeeseeeeeeeeeeeenenes 6 Foure 2 2 Hardware TACO VE 7 Figure 2 3 Found New Hardware Wizard sss ssssssssssssssssssssssesssseese eege ennenen ennenen enne 7 Figure 2 4 Automatic E TT 8 Figure 2 5 Complete Hardware Installation ccccccccscsssssseeeeeeeeeeeeeesneeeeeeeeeeoeesseeeeeeeeeecoessseeeeeesseooanens 8 CUNO ER e ACW ANS Te EE 8 Figure 2 7 DEVICE MAM AC LTE H Figure 2 8 COM Port and USB Device name ASSsignment sssssssssssssss sese sese sees eee 9 Figure 2 9 COM Port Assignment and Properties cccccccessseeeeseesseeeeeeeesseeeeeoeesseeeseoeeseeeesenenseeeeseoeess 10 Foure l S
21. t 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 Copyright 2010 Future Technology Devices International Limited 9 USB Serial Port COM10 Properties General Port Settings Driver Details F USB Serial Port COM10 es Device type Ports COM amp LPT Manufacturer FTDI Location on USB Serial Converter 4 Device status H USB Serial Port COM11 Properties This device is working properly If you are having problems with this device click Troubleshoot to start the troubleshooter Device usage Use this device enable Troubleshoot General Port Settings Driver Details F USB Serial Port COM11 l s Ports COM amp LPT FTDI Device type Manufacturer Location on USB Serial Converter B Device status Document Reference No FT_000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 This device is working properly start the troubleshooter If you are having problems with this device click Troubleshoot to Device usage v Use this device enable Troubleshoot Figure 2 9 COM Port Assignment and Properties Use this COM port number with your application software in order to access the USB COM485 PLUS2 If an application requires use of a different COM port number the assignment may be changed thr
22. vel shifter converts the signals provided by the FT2232H into the voltage levels required by RS485 devices DE 9P Connector Male The DE 9P connector is configured in an industry standard TIA EIA 574 pin out to provide connection to RS485 peripherals through standard cables See section 3 1 2 Copyright 2010 Future Technology Devices International Limited 2 Document Reference No FT 000136 USB COM485 PLUS2 Datasheet Version 1 2 Clearance No FTDI 104 1 4 Features e Adds dual RS 485 serial port by connecting to a USB 2 0 Hi Speed interface e Easy plug amp play installation and RS 485 device connection e Operates with USB 1 1 amp 2 0 Host and Hub ports e Industry Standard FTDI chip set amp device drivers for maximum compatibility e Microsoft Windows WHQL certified Mac OS X Linux and Windows CE device drivers e Installs as a standard Windows COM port e 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 e Supports Windows Server 2008 2003 Vista XP 2000 Windows CE Linux Mac OS X e FIFO 4K byte transmit buffer 4K byte receive buffer e RS 485 data signals Data Data GND e Powered by USB port No external power adapter required 5V output available e Serial port speed up to 10Mbps e Serial Communication Parameters o Parity None Even Odd o Data bits 7 8 o Flow control X ON X OFF Non
23. ves gy Human Interface Devices 3 IDE ATA ATAPI controllers Sai IEEE 1394 Bus host controllers S38 Imaging devices Se Keyboards Mice and other pointing devices 1 72 Monitors BB Network adapters Ports COM amp LPT SB Processors Sound video and game controllers System devices Universal Serial Bus controllers Figure 2 7 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 Si Network adapters lt Y NVIDIA Network Bus Enumerator oy Ports COM amp LPT Ei Communications Port COM1 Communications Port COM2 ay Printer Port LPT1 MA USE Serial Port COM10 d USB Serial Port COM11 g Processors Sound video and game controllers System devices Universal Serial Bus controllers Generic USB Hub Standard Enhanced PCI to USB Host Controller Standard OpenHCD USB Host Controller USB Composite Device USB Root Hub USB Root Hub USB Serial Converter 4 USB Serial Converter B fF Figure 2 8 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 i
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