ASSURED USB to RS-485 Converter Instructions
- August 25, 2024
- ASSURED
Table of Contents
ASSURED USB to RS-485 Converter Instructions
ACCES I/O USB-485 Get Quote
USB to RS-485 CONVERTER
The model USB-485 Converter is an intelligent module which connects to a PC Universal Serial Bus port providing a high-speed asynchronous RS-485 serial port. The USB-485 Converter provides easy connectivity between the PC and standard communication ports, not requiring PC reconfiguration, assignment of IRQs or jumper settings.
SYSTEM REQUIREMENTS
A PC with a minimum of a 75M Hz Pentium, or equivalent
A minimum of 16M bytes of RAM
One available USB type port compliant with USB1.1
Drivers are included on our software master CD that normally ships with ACCES
hardware.
Supported Operating Systems: Windows 98/SE, 2000, Me, XP, Linux – built-in to
kernel 2.4.0+, MAC OS/8.2 and higher (including X). Driver information is
subject to change. Check with ACCES for updated driver information.
CONNECTIONS TO SYSTEM
The USB-485 Converter is equipped with a USB cable and a USB type A connector for connection to a PC USB port and a male DB-9 for connection to an RS-485 equipped data or communication terminal.
A shielded cable with a twisted pair is required for optimal operation. Connection between +TX and +RX pins 2 and 9 and between -TX and -RX pins 3 and 1 are required. This two wire configuration operates in HALF DUPLEX. Bias is provided on RX+ and RX- lines.
INDICATOR
A green LED illuminates to indicate transmission or reception of data over the serial port.
INSTALLING THE USB-485 CONVERTER
Note: The RS-485 terminal should not be connected to the converter before the drivers are installed.
- Power on your computer. Verify the USB port is enabled. Insert the floppy disc or CD containing the software for the USB-485 Converter.
- Connect the cable of the converter to the USB port of the PC. (USB-485 is hot-pluggable.)
- Windows will detect the USB device. Install the driver as described in the next section.
DRIVER INSTALLATION
- The “Add New Hardware Wizard” will display. Click “Next”. Click: “Search for the best driver…”
- Select: “Specify a location” and specify the drive letter for the CDROM or floppy drive where you have inserted the software. Click: “Next” to start search.
- Click “Next” to continue.
- Click “Finish”. At this point Windows has finished installing the USB-485 Converter driver.
- The USB-485 is detected. Click “Next” to continue.
- Connect the RS-485 communication terminal to the USB-485 converter.
- Click on Start , Settings , and Control Panel. Double click System and click on Device Manager. Verify the USB-485 Converter is in the list of COM PORT S as “USB to Serial Adapter”.
- Installation is complete. The PO RTS section of Device Manager mentioned in step 7 shows the new COM port number, following the “USB to Serial Adapter:”
SPECIFICATIONS
Communication speed 300 to 920K baud
Power consumption 50mA @5volt (power provided by the PC’s USB port.)
Temperature Range 0ºC to 50ºC.
Humidity Range 10 to 90% R.H. Non-condensing.
Modes of Operation RS-485 Half Duplex (2-wire). Connections between +Tx and
+Rx pins 2 & 9 and between -Tx and -Rx pins 3 & 1 have to be made in the
external cable.
Termination None
Bias 4.7K resistors as pull-up/pull-down Rx+ and Rx respectively.
INTERFACE CONNECTOR: DB-9, Male
PIN ASSIGNMENTS:
| PIN# | SIGNAL |
|---|---|
| 1 | -Rx |
| 2 | +Tx |
| 3 | -Tx |
| 4 | NC |
| 5 | GND |
| 6 | NC |
| 7 | NC |
| 8 | NC |
| 9 | +Rx |
UNINSTALLING THE USB-485 CONVERTER
- Unplug the USB-485 Converter.
- Insert the converter software diskette or CD.
- Run the FTDIUNIN.EXE program from the diskette and reboot the PC.
Assured Systems
Assured Systems is a leading technology company with over 1,500 regular clients in 80 countries, deploying over 85,000 systems to a diverse customer base in 12 years of business. We offer high-quality and innovative rugged computing, display, networking and data collection solutions to the embedded, industrial, and digital-out-of-home market sectors.
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Support: +1 347 719 4508
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USA
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ST15 0YJ
United Kingdom
VAT Number: 120 9546 28
Business Registration Number: 07699660
www.assured-systems.com | sales@assured- systems.com
References
- Industrial Embedded Computers and Displays - Assured Systems
- Industrial Embedded Computers and Displays - Assured Systems
- Industrial Embedded Computers and Displays - Assured Systems