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Document Reference No FT 000117,USB TO RS485 SERIAL CONVERTER CABLE Datasheet. Version 1 4,Clearance No FTDI 75,1 Description, The USB RS485 cable is a USB to RS485 levels serial UART converter cable incorporating FTDI s. FT232RQ USB to serial UART interface IC device which handles all the USB signalling and protocols The. cable provides a fast simple way to connect devices with a RS485 interface to USB. Each USB RS485 cable contains a small internal electronic circuit board utilising the FT232R which is. encapsulated into the USB connector end of the cable The FT232R datasheet DS FT232R is available at. http www ftdichip com The integrated electronics also include the RS485 transceiver plus Tx and Rx. LEDs which give a visual indication of traffic on the cable if transparent USB connector specified. The other end of the cable is bare tinned wire ended connections by default but can be customised. using different connectors to support various applications. The USB RS485 cable is designed for use at the end of an RS485 network up to approximately 10m For. longer networks or placement of the USB RS485 cable in the middle of an RS485 network it is. recommended that the attached wire is cut to 20cm or less to ensure signal integrity. Cables are FCC CE RoHS compliant, The cable is USB powered and USB 2 0 full speed compatible Each cable is 1 8m long and supports a. data transfer rate up to 3 Mbaud Each cable supports the FTDIChip ID with a unique USB serial. number programmed into the FT232R This feature can be used to create a security or password. protected file transfer access using the cable Further information and examples on this feature are. available at http www ftdichip com under FTDIChip ID Projects. The USB RS485 cables require USB drivers available free from http www ftdichip com which are. used to make the FT232R in the cable appear as a virtual COM port VCP This then allows the user to. communicate with the USB interface via a standard PC serial emulation port for example TTY Another. FTDI USB driver the D2XX driver can also be used with application software to directly access the. FT232R on the cable though a DLL This is illustrated in the Figure 1 1. Various Connector,Wire Ended,Customised connectors. Virtual COM Port,Various Connector,Wire Ended,USB Customised connectors.
Software application access to USB via D2XX,Figure 1 1 Using the USB RS485 Cable. Copyright 2010 Future Technology Devices International Limited 1. Document Reference No FT 000117,USB TO RS485 SERIAL CONVERTER CABLE Datasheet. Version 1 4,Clearance No FTDI 75,2 Cable Part Numbers. The following, Table 2 1 gives details of the available USB RS485 cables. Part Number Description End Connector Cable details. USB to UART cable with RS485 1 8m cable 6 core,Wire Ended no.
USB RS485 WE 1800 BT level UART signals Black cable UL2464 24 AWG. Transparent USB connector diam 5mm,USB to UART cable with RS485. level UART signals,C cable colour B black or T LLLL Length of. USB RS485 CC LLLL CU CC Connector,transparent cable. X description,U USB connector colour T,transparent or B black. X voltage P is 5V G is 0V, Table 2 1 USB RS485 Cables Descriptions and Part Numbers.
FTDI supports customised end connector designs For more information please contact FTDI Sales Team. sales1 ftdichip com,2 1 Certifications, FTDI USB RS485 cable is fully RoHs compliant as well as CE and FCC certified. FCC Part 15 Subpart B Class B CISPR 22 1997 A1 2000 Class B ICES 003 2004 Class B. ANSI C63 4 2003,2 1 USB Compliant, The USB R485 cables are fully compliant with the USB 2 0 specification. Copyright 2010 Future Technology Devices International Limited 2. Document Reference No FT 000117,USB TO RS485 SERIAL CONVERTER CABLE Datasheet. Version 1 4,Clearance No FTDI 75,Table of Contents. 1 Description 1,2 Cable Part Numbers 2,2 1 Certifications 2.
2 1 USB Compliant 2, The USB R485 cable is fully compliant with the USB 2 0 specification 2. 3 Typical Applications 4,3 1 Driver Support 4,3 2 Features 4. 4 Features of FT232R applicable to USB RS485 Cable 5. 5 USB RS485 WE LLLL CU X 6, 5 1 USB RS485 WE Connections and Mechanical Details 6. 5 2 USB RS485 WE Cable Signal Descriptions 7,5 3 USB RS485 WE Electrical Parameters 7. 5 4 Local Echo 8,6 Cable PCB Block Diagram 9,7 USB RS485 Schematic 10.
8 Contact Information 11,Appendix A Cable EEPROM Configuration 13. Appendix B List of Figures and Tables 14,Appendix C Revision History 15. Copyright 2010 Future Technology Devices International Limited 3. Document Reference No FT 000117,USB TO RS485 SERIAL CONVERTER CABLE Datasheet. Version 1 4,Clearance No FTDI 75,3 Typical Applications. USB to serial RS485 level converter USB Instrumentation PC interface. Upgrading legacy peripherals to USB USB industrial control. Interface Microcontroller UART or I O to USB USB password protected file transfers. Interface FPGA or PLD to USB,3 1 Driver Support, Royalty free VIRTUAL COM PORT Royalty free D2XX Direct Drivers.
VCP DRIVERS for USB Drivers DLL S W Interface,Windows 7 64 bit Windows 7 64 bit. Windows XP and XP 64 bit Windows XP and XP 64 bit, Windows Vista and Vista 64 bit Windows Vista and Vista 64 bit. Windows XP Embedded Windows XP Embedded, Windows 98 98SE ME 2000 Server 2003 Windows 98 98SE ME 2000 Server 2003. and Server 2008 and Server 2008, Windows CE 4 2 5 0 and 6 0 Windows CE 4 2 5 0 and 6 0. Mac OS 8 9 OS X Linux 2 4 and greater,Linux 2 4 and greater Mac OS X.
The drivers listed above are all available to download for free from www ftdichip com Various 3rd. Party Drivers are also available for other operating systems see www ftdichip com for details. 3 2 Features, USB RS485 converter cable provides a USB to X On X Off software handshaking. RS485 serial interface with customised end,Data transfer rates from 300 baud to 3 Mbaud. connectors,Support for FT232R FTDIChip ID feature for. Entire USB protocol handled by the electronics,improved security. in the cable,Low USB bandwidth consumption,EIA TIA 485 communication interface with low.
power requirements UHCI OHCI EHCI host controller compatible. UART interface support for 7 or 8 data bits 1 USB 2 0 Full Speed compatible. or 2 stop bits and odd even mark space,40 C to 85 C operating temperature range. Cable length is 1 80m 6 feet,Internal EEPROM with user writeable area. ESD Protection for RS 485 I O s,FTDI s royalty free VCP allow for. 15kV Human Body Model HBM,communication as a standard emulated COM. 15kV EN61000 4 2 Air Gap Discharge,port and D2XX direct drivers provide DLL.
8kV EN61000 4 2 Contact Discharge,application programming interface. FCC and CE compliant, Visual indication of Tx and Rx traffic via LEDs in. the transparent USB connector Custom versions available on request subject. RoHS Compliant, Copyright 2010 Future Technology Devices International Limited 4. Document Reference No FT 000117,USB TO RS485 SERIAL CONVERTER CABLE Datasheet. Version 1 4,Clearance No FTDI 75, 4 Features of FT232R applicable to USB RS485 Cable.
The USB RS485 cable uses FTDI s FT232RQ USB to serial UART IC device This section summarises the. key features of the FT232RQ which apply to the USB RS485 USB to serial RS485 converter cables For. further details and a full features and enhancements description consult the FT232R datasheet This is. available from www ftdichip com, Internal EEPROM The internal EEPROM in each cable is used to store USB Vendor ID VID Product ID. PID device serial number product description string and various other USB configuration descriptors. Each cable is supplied with the internal EEPROM pre programmed as described in Appendix A Cable. EEPROM Configuration The internal EEPROM descriptors can be programmed in circuit over USB. without any additional voltage requirement It can be programmed using the FTDI utility software called. MPROG which can be downloaded from FTDI Utilities on the FTDI website www ftdichip com. Additionally there is a user area of the internal EEPROM available to system designers to allow storing of. data note that this is not modified by MPROG, Lower Operating and Suspend Current The FT232R has a low 15mA operating supply current and a. very low USB suspend current of approximately 70 A Note that during suspend mode the current. drawn by any customised cable application which uses the USB supply should not exceed 2 5mA to. remain USB compliant, Low USB Bandwidth Consumption The USB interface of the FT232R and therefore the USB RS485. cables has been designed to use as little as possible of the total USB bandwidth available from the USB. host controller, FTDIChip ID The FT232R includes the new FTDIChip ID security dongle feature This FTDIChip ID. feature allows a unique number to be burnt into each cable during manufacture This number cannot be. reprogrammed This number is only readable over USB can be used to form the basis of a security dongle. which can be used to protect any customer application software being copied This allows the possibility. of using the USB RS485 cables as a dongle for software licensing Further to this a renewable license. scheme can be implemented based on the FTDIChip ID number when encrypted with other information. This encrypted number can be stored in the user area of the FT232R internal EEPROM and can be. decrypted then compared with the protected FTDIChip ID to verify that a license is valid Web based. applications can be used to maintain product licensing this way An application note AN232R 02. available from FTDI website www ftdichip com describes this feature. Improved EMI Performance The USB RS485 cables are FCC and CE certified. Extended Operating Temperature Range The USB RS485 cables are capable of operating over an. extended temperature range of 40 to 85 C thus allowing them to be used in automotive or industrial. applications, Copyright 2010 Future Technology Devices International Limited 5.
Document Reference No FT 000117,USB TO RS485 SERIAL CONVERTER CABLE Datasheet. Version 1 4,Clearance No FTDI 75,5 USB RS485 WE LLLL CU X. The USB RS485 WE cable is un terminated it has bare and tinned wires. The LLLL specifies the length of the cable in cm The CU specifies the colour of the cable and the colour of. the USB connector The cable can be either Black or transparent The USB connector comes default as. transparent because of LED implemented inside the plug but can be sold in black colour as well For. simplicity the LLLL and CU have been dropped from the following descriptions. The cable outputs 5V power on the wire by default This can be modified to output 0V power The letter X. in the part number indicates the output power selection. 5 1 USB RS485 WE Connections and Mechanical Details. The following Figure 5 1 shows the cable signals and the wire colours for the signals on the USB RS485. Figure 5 1 USB RS485 WE Connections, Figure 5 2 USB RS485 WE Mechanical Details dimensions in mm. Figure 5 3 USB RS485 WE Cable images, Copyright 2010 Future Technology Devices International Limited 6. Document Reference No FT 000117,USB TO RS485 SERIAL CONVERTER CABLE Datasheet.
Version 1 4,Clearance No FTDI 75,5 2 USB RS485 WE Cable Signal Descriptions. Colour Name Type Description,Black GND GND Device ground supply pin. Pin 1 of 120R Terminating Resistor Only Required if. the USB RS485 WE cable is the first or last device. Brown Terminator 1 Input,in a multi drop RS485 System to meet RS485. Termination Requirements,Default output is 5V when active 0V during. Power output can be customized to 0V if required,Red POWER Output.
contact FTDI Sales Team sales1 ftdichip com,Switchable power to external device 250mA max. OFF during suspend,Orange Data A Bi Direction Data A Signal. Yellow Data B Bi Direction Data B Signal, Pin 2 of 120R Terminating Resistor Only Required if. the USB RS485 WE cable is the first or last device. Green Terminator 2 Input,in a multi drop RS485 System to meet RS485. Termination Requirements,Table 5 1 USB RS485 WE Cable Signal Descriptions.
5 3 USB RS485 WE Electrical Parameters, Parameter Description Minimum Typical Maximum Units Conditions. This only applies when,cable has been configured to. output 5V The range is,VCC 5V Output Power Voltage 4 25 5 0 5 25 V. dependent on the USB port,that the USB RS485 WE is. connected to,Must be less that 2 5mA,IO Output Power Current 250 mA.
during suspend,Operating Temperature o,Table 5 2 USB RS485 WE I O Operating Parameters. Default is 5V,Only applies when POWER output is 5V. Copyright 2010 Future Technology Devices International Limited 7. Document Reference No FT 000117,USB TO RS485 SERIAL CONVERTER CABLE Datasheet. Version 1 4,Clearance No FTDI 75, Parameter Description Minimum Typical Maximum Units Conditions. Receiver Input,Common mode input,VCM 7 12 V,voltage range.
1 0 VIN 12V,IN Input Current mA,0 8 VIN 7V,DIfferential Threshold. VTH 0 2 0 2 V,Voltage VTH,VIHYST Input Hysteresis 20 mV. RIN Input Resistance RIN 12 15 k,Transmitter Output. DIfferential Output Voltage,VOD 1 5 5 V With RL 54 CL 50pF. Table 5 3 USB RS485 WE I O Pin Characteristics, The 54 ohms is the equivalent of two 120 ohm termination.
4 Features of FT232R applicable to USB RS485 Cable The USB RS485 cable uses FTDI s FT232RQ USB to serial UART IC device This section summarises the key features of the FT232RQ which apply to the USB RS485 USB to serial RS485 converter cables For further details and a full features and enhancements description consult the FT232R datasheet

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