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Summary of Contents for Acces I/O products USB-FLEXCOM4
- Page 1 10623 Roselle Street, San Diego, CA 92121 (858) 550-9559 Fax (858) 550-7322 contactus@accesio.com www.accesio.com MODEL USB-FLEXCOM4 USB to Four RS-232/422/485 Serial Ports MODEL USB-COM232-4A USB to Four RS-232 Serial Ports USER MANUAL...
- Page 2 FILE: MUSB-FLEXCOM4.C3 Manual USB-FLEXCOM4...
- Page 3 ACCES, nor the rights of others. IBM PC, PC/XT, and PC/AT are registered trademarks of the International Business Machines Corporation. Printed in USA. Copyright by ACCES I/O Products, Inc. 10623 Roselle Street, San Diego, CA 92121. All rights reserved. WARNING!! ALWAYS CONNECT AND DISCONNECT YOUR FIELD CABLING WITH THE COMPUTER POWER OFF.
- Page 4 Other than the above, no other warranty, expressed or implied, shall apply to any and all such equipment furnished or sold by ACCES. Manual USB-FLEXCOM4...
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Page 5: Table Of Contents
Table A-1: Connections Between Two RS422 Devices ................18 Table A-2: RS485 Data Cable Wiring ....................... 18 Table A-2: RS422/485 Specification Summary ..................19 RS485 Data Transmission ........................... 20 Figure A-1: Typical RS485 Two-Wire Multidrop Network ................. 21 Customer Comments ............................23 Manual USB-FLEXCOM4... -
Page 6: Chapter 1: Introduction
"zero" state when all transmitters are off. Also, receiver inputs at each end of the network should be terminated to eliminate "ringing". The card supports biasing by default and supports termination by jumpers on the card. If your application requires the transmitter to be un-biased, please call us. Manual USB-FLEXCOM4... -
Page 7: Com Port Compatibility
4000 feet as both communication lines are actively driven instead of just one as in RS-232. Half-Duplex mode: RS-485 multi-drop (32 transmitters/receivers allowed on a single twisted pair) Full-Duplex modes: RS-422 RS-232 Differential communication modes: RS-485 RS-422 Single-ended communication mode: RS-232 Manual USB-FLEXCOM4... -
Page 8: Baud Rates
Figure 1-1: Block Diagram (Only one full serial channel shown) Baud Rates Baud rates up to 921.6kbps are supported in RS-422 and RS-485 modes while RS-232 has a limit of 230.4kbps. Manual USB-FLEXCOM4... -
Page 9: Ordering Guide
Wide input power supply voltage range of 7VDC to 30VDC • –RI Enables Ring Indicator per specified port on USB-FLEXCOM4 versions only • Substitutes standard USB 2.0 type A to B cable with a type A to locking B cable •... -
Page 10: Chapter 2: Installation
Install jumpers for each port following either the Option Selection section of this manual or the suggestions of the SETUP.EXE software program. Re-install the lid and four screws. Plug the USB cable into the device and the USB port then follow the new hardware wizard to complete the driver installation. Manual USB-FLEXCOM4... -
Page 11: Chapter 3: Hardware Details
TERM near J2 (COM B), J3 (COM C) or J4 (COM D) respectively. Also, for RS485 operation, there must be a bias on the TRX+ and TRX- lines which this adapter provides. If the adapter is not to provide that bias, contact the factory for technical support. Manual USB-FLEXCOM4... - Page 12 485TX and 485RX jumpers, and install both the TxRx+ jumper and the TxRx- jumper. 5) To provide a termination load for RS422 or RS485, install the TERM jumper for that channel. Note: Any unneeded jumpers that are installed can cause the adapter to function incorrectly. Manual USB-FLEXCOM4...
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Page 13: Default Shipping Configuration
USB Connector Type B, high-retention design Embedded USB Connector Mini 5-pin header in parallel with type B connector LED near USB connector Indicates power and activity LEDs and DB9 Connectors COM activity indicator next to each COM port connector Manual USB-FLEXCOM4... -
Page 14: Chapter 4: Usb Address Information
Use the provided driver to access the USB board. This driver will allow you to determine how many supported USB devices are currently installed, and each device’s type. Address Map The core of the UART function is supplied by the FTDI FT4232H chip. Manual USB-FLEXCOM4... -
Page 15: Chapter 5: Programming
► CreateFile() and CloseHandle() for opening and closing a port. ► SetupComm(), SetCommTimeouts(), GetCommState(), and SetCommState() to set and change a port’s settings. ► ReadFile() and WriteFile() for accessing a port. See the documentation for your chosen programming language for details. Manual USB-FLEXCOM4... -
Page 16: Chapter 6: Connector Pin Assignments
Ch x – 7 Ch x – 9 Ch x – 2 Ch x – 4 Ch x – 6 Ch x – 8 RI (Factory option) Ch x - 10 Table 6-2: 10-Pin Header Connector Pin Assignments Manual USB-FLEXCOM4... -
Page 17: Chapter 7: Specifications
-50 °C. to +120 °C • Humidity: 5% to 95%, non-condensing • Power Required: Model USB-FLEXCOM4 5VDC at ~110mA (plus loads up to an additional 240mA) from USB Model USB-COM232-4A 5VDC at ~80mA with no load (with all ports communicating... -
Page 18: Appendix A: Application Considerations
RS422 devices can share a single cable if only one will talk and the others will all receive. SERIAL PORT CONNECTOR CABLE TO RS-485 DEVICE Signal Pin No. Signal Pin No. Tx/Rx+ Tx/Rx + Tx/Rx - Tx/Rx - 100 Ω to 100 Ω to Ground Ground Table A-2: RS485 Data Cable Wiring Manual USB-FLEXCOM4... - Page 19 (An exception to this is the case where the line is driven by an RS422 driver that is never "tristated" or disconnected from the line. In this case, the driver provides a low internal impedance that terminates the line at that end.) Manual USB-FLEXCOM4...
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Page 20: Rs485 Data Transmission
The following illustration shows a typical multidrop or party line network. Note that the transmission line is terminated on both ends of the line but not at drop points in the middle of the line. Manual USB-FLEXCOM4... - Page 21 Figure A-1: Typical RS485 Two-Wire Multidrop Network Manual USB-FLEXCOM4...
- Page 22 This has advantages in equipment that uses mixed protocol communications. Since the slave nodes never listen to another slave's response to the master, a slave node cannot reply incorrectly. Manual USB-FLEXCOM4...
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Page 23: Customer Comments
If you experience any problems with this manual or just want to give us some feedback, please email us at: manuals@accesio.com. Please detail any errors you find and include your mailing address so that we can send you any manual updates. 10623 Roselle Street, San Diego CA 92121 Tel. (858)550-9559 FAX (858)550-7322 www.accesio.com Manual USB-FLEXCOM4...