ASSURED RS-485 USB Converter Instructions

: August 7, 2024
: ASSURED

Table of Contents

RS-485 USB Converter
ACCES I/O USB-485 Converter
Specifications:
Product Usage Instructions:
System Requirements:
Connections to System:
Indicator:
Installing the USB-485 Converter:
Driver Installation:
- FAQ:
Q: Can I use the USB-485 Converter with Windows 10?

RS-485 USB Converter

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ACCES I/O USB-485 Converter

Specifications:

Communication speed: 300 to 920K baud
Power consumption: 50mA @ 5 volts (power provided by the PC’s
USB port)
Temperature Range: 10 to 90% R.H. Non-condensing
Humidity Range
Modes of Operation: RS-485 Half Duplex (2-wire)
Termination Bias: Connections between +Tx and +Rx pins 2 &
9 and between -Tx and -Rx pins 3 & 1 have to be made in the
external cable

Product Usage Instructions:

System Requirements:

A PC with a minimum of a 75MHz Pentium or equivalent, a minimum
of 16MB of RAM, and one available USB type port compliant with USB
1.1. Supported Operating Systems: Windows 98/SE, 2000, Me, XP,
Linux (kernel 2.4.0+), MAC OS/8.2 and higher.

Connections to System:

The USB-485 Converter comes with a USB cable for connection to a
PC USB port and a male DB-9 for connection to an RS-485 equipped
device. Use a shielded cable with a twisted pair for optimal
operation. Connect +TX to +RX pins 2 and 9, and -TX to -RX pins 3
and 1 for HALF DUPLEX operation.

Indicator:

A green LED illuminates to indicate data transmission or
reception over the serial port.

Installing the USB-485 Converter:

Power on your computer and verify the USB port is enabled.
Insert the software CD for the USB-485 Converter.
Connect the converter cable to the PC’s USB port.
Windows will detect the USB device, follow driver installation
steps below.

Driver Installation:

The Add New Hardware Wizard will display. Click Next and search
for the best driver.
Specify the location of the driver on the CD or floppy drive.
Click Next to start the search.
Follow on-screen instructions until Windows finishes installing
the driver.
Connect the RS-485 terminal to the USB-485 converter.

FAQ:

Q: Can I use the USB-485 Converter with Windows 10?

A: The supported operating systems are Windows 98/SE, 2000, Me,
XP, Linux (kernel 2.4.0+), MAC OS/8.2 and higher. Compatibility
with Windows 10 may vary.

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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 com puter. 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 W izard” 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 C onverter 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 M anager.

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:”

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S P E C IF IC A T IO N S Communication speed Power consumption Temperature Range Humidity Range Modes of Operation
Termination Bias

300 to 920K baud
50mA @5volt (power provided by the PC’s USB port.)
0ºC to 50ºC.
10 to 90% R.H. Non-condensing.
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.
None
4.7K resistors as pull-up/pull-down Rx+ and Rxrespectively.

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
1. Unplug the USB-485 Converter. 2. Insert the converter software diskette or CD.
3. Run the FTDIUNIN.EXE program from the diskette and reboot the PC.

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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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sales@assured-systems.com
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sales@assured-systems.com
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