USB-RS485-PCBA FTDI, Future Technology Devices International Ltd, USB-RS485-PCBA Datasheet
USB-RS485-PCBA
Specifications of USB-RS485-PCBA
Related parts for USB-RS485-PCBA
USB-RS485-PCBA Summary of contents
Page 1
... Future Technology Devices International Ltd USB TO RS485 UART SERIAL CONVERTER PCB Future Technology Devices International Limited (FTDI) Unit1, 2 Seaward Place, Centurion Business Park,, Glasgow G41 1HH United Kingdom Tel.: +44 (0) 141 429 2777 E-Mail (Support): Copyright © 2008 Future Technology Devices International Limited 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 ...
Page 2
... RS485 transceiver plus Tx and Rx LEDs which give a visual indication of UART traffic. The PCB is USB powered and USB 2.0 full speed compatible. Each PCB supports a data transfer rate Mbaud and supports the FTDIChip-ID™, with a unique USB serial number programmed into the FT232R ...
Page 3
... USB-RS485-PCB USB to RS485 level UART PCB Table 1.1 USB-RS485-PCB Part Number 1.2 USB Compliant The USB-RS485-PCB is fully compliant with the USB 2.0 specification. Copyright © 2010 Future Technology Devices International Limited Document Reference No.: FT_000120 USB to RS485 UART Serial Converter PCB Datasheet Version 1 ...
Page 4
... USB Compliant .............................................................................................. 2 2 Typical Applications ........................................................................ 4 2.1 Driver Support .............................................................................................. 4 2.2 Features ........................................................................................................ 4 3 Features of FT232R applicable to USB-RS485-PCB ......................... 5 4 USB-RS485-PCB Connector Pin Out and Mechanical details ............ 6 4.1 USB-RS485-PCB Signal Descriptions ............................................................. 8 4.2 USB-RS485-PCB Electrical Parameters .......................................................... 9 4.3 Local Echo ................................................................................................... 10 5 USB-RS485-PCB Circuit Schematic ............................................... 11 6 Contact Information ..................................................................... 12 Appendix A – ...
Page 5
... Windows CE 4.2, 5.0 and 6.0 Linux 2.4 and greater Mac OS-X Support for FT232R FTDIChip-ID™ feature for improved security. PCB is USB Powered – no external supply required. X-On / X-Off software handshaking Low USB bandwidth consumption. UHCI / OHCI / EHCI host controller compatible. ...
Page 6
... USB suspend current of approximately 70μA. Low USB Bandwidth Consumption. The USB interface of the FT232R, and therefore the USB-RS485- PCB 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™ ...
Page 7
... TOP BOTTOM Figure 4.1 USB-RS485-PCB Pin Out (Top is TOP View, Bottom is BOTTOM View) The mechanical details of the PCB are shown in the following diagram Figure 4.2 Additional pads were added to the PCB to allow for easier wiring which resulted in a Rev 2 PCB. There were no other changes between Rev 1 and Rev 2. Copyright © ...
Page 8
... Dimensions in mm Figure 4.2 USB-RS485-PCB, Mechanical Details Copyright © 2010 Future Technology Devices International Limited USB to RS485 UART Serial Converter PCB 24.9 +/- 0.4 11.85 +/- 0.35 1.6 11.85 +/- 0.35 4.9 +/- 0.1 Document Reference No.: FT_000120 Datasheet Version 1.1 Clearance No ...
Page 9
... Type Description GND GND Device ground supply pin. Pin 1 of 120R Terminating Resistor. Only Required if the USB-RS485-PCB cable is the first or last device Terminator 1 Input in a multi-drop RS485 System, to meet RS485 Termination Requirements. Power output. Default output is +5V when active, 0V during suspend. If required, contact FTDI Sales ...
Page 10
... The 54 ohms is the equivalent of two 120 ohm termination resistors placed on each side of the transmission line and the input impedance of 32 receivers on the line. Copyright © 2010 Future Technology Devices International Limited USB to RS485 UART Serial Converter PCB Minimum Typical Maximum 4 ...
Page 11
... RS485 systems often have local echo enabled. This means any data transmitted by a device is echoed back to itself. The USB-RS485-PCB allows for local echo to be enabled/disabled by changing a bit in the FT232R EEPROM. If CBUS4 in the EEPROM is set for “PWRON#” local echo is enabled. If CBUS4 in the EEPROM is set for “ ...
Page 12
... USB-RS485-PCB Circuit Schematic The circuit schematic of the USB-RS485-PCB, utilising the FTDI FT232R, is shown in Figure 5.1 Figure 5.1 Circuit Schematic of USB-RS485-PCB. Copyright © 2010 Future Technology Devices International Limited Document Reference No.: FT_000120 USB to RS485 UART Serial Converter PCB Datasheet Version 1.1 Clearance No. FTDI#80 ...
Page 13
... Tel: +1 (503) 547 0988 Fax: +1 (503) 547 0987 E-Mail (Sales) us.sales@ftdichip.com E-Mail (Support) us.admin@ftdichip.com Web Site URL http://www.ftdichip.com Copyright © 2010 Future Technology Devices International Limited Document Reference No.: FT_000120 USB to RS485 UART Serial Converter PCB Datasheet Version 1.1 Clearance No. FTDI#80 12 ...
Page 14
... 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 Document Reference No.: FT_000120 USB to RS485 UART Serial Converter PCB Datasheet Version 1.1 Clearance No. FTDI#80 ...
Page 15
... MPROG can be downloaded from the www.ftdichip.com. Version 2.8a or later is required for the FT232R chip. Users who do not have their own USB Vendor ID but who would like to use a unique Product ID in their design can apply to FTDI for a free block of unique PIDs. Contact FTDI support for this service. ...
Page 16
... Appendix B – List of Figures and Tables List of Figures Figure 1.1 Using the USB-RS485-PCB ........................................................................................................... 1 Figure 4.1 USB-RS485-PCB Pin Out (Top is TOP View, Bottom is BOTTOM View) .................................. 6 Figure 4.2 USB-RS485-PCB, Mechanical Details .......................................................................................... 7 Figure 5.1 Circuit Schematic of USB-RS485-PCB. ..................................................................................... 11 List of Tables Table 1.1 USB-RS485-PCB Part Number ....................................................................................................... 2 Table 4 ...
Page 17
... Added Rev 1 and Rev 2 mechanical diagrams Version 1.1 Edited Figure 4.1 and table 4.1, signals A Data+ and B Data- Added section 1.2 USB compliant Logo Copyright © 2010 Future Technology Devices International Limited Document Reference No.: FT_000120 USB to RS485 UART Serial Converter PCB January, 2009 21 st January, 2009 th ...