Vernier VE11 485 User manual

User Manual for RS485 to USB Converter, Model VE11 485
1. Introduction :
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1-1 Specification :
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2. Hardware Description :
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2-1 Panel layout :
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2-2 LED Indictor :
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2-3 Power Connection :
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2-4 USB Connection :
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2-5 RS485 Wiring :
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2-6 RS422 Wiring :
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3. Terminal Resister :
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3-1 RS422 terminal resistor connection :
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3-2 RS485 terminal resistor connection :
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3-3 Terminal Resistor Specification :
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4 Driver Installation
1. Introduction
The VE11U 485 allows you to connect your serial devices to systems by using a USB interface. With
data format auto detecting and baud rate auto switching function, VE11U 485 is able to automatically
detect the data flow and switch the direction of the data lines as well as to automatically configure
RS422/485 signals to any baud rate without external switch setting.
1-1. Specification.
USB
Compliant : USB 1.0 , 1.1 , 2.0
Connector : USB type A
Baud Rates : Upto 12 Mbps
Serial Port
Port : 1 port ( Terminal Block )
RS-422 : RxD+, RxD-, TxD+, TxD-,
RS-485 : Data+, Data-
RS422, RS485 : Auto Detect
RS422, RS-485 : Surge Protection for all signal lines.
Receive buffer : 576 Byte
Transmit buffer : 640 Byte
Baud Rate : 300 ~ 230.4 K bps
Flow Control : X-On / X-Off or Hardware
Driver Support : Windows -98SE / 2000 / XP / Server 2003 / Mac osx / os9 / Linux 2.4 / 2.6
Power : USB Bus Power ( 5V ). No external supply needed.
Indications : Power / TX / RX mode LED indicators
Dimension : Size : 55 * 40 * 25 mm ( W * D * H )
Weight : 35 gms
Environment : Operating Temp : 0 to 55C
Storge Temp : -20 to 85C
Humidity : 5~95 % RH
Power consumption : 0.3W.

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2. Hardware Description
2-1. Panel layout
2-2. LED Indictor
PWR LED: System is ready.
RX LED : Receiving.
TX LED : Transmitting.
2-3. Power Connection
(USB Internal Bus)
Direct power input from USB bus port.
(current 55mA/+5V)
2-4. USB Connection
The VE11U 485 has a USB A-Type
connector which is fully compliant with
USB 1.1, 1.0 and USB 2.0, the full rate
speed up to 12Mbps.
2-5. RS485Wiring
The RS-485 mode supports the Transmit and Receive channels using 2-wire half-duplex operation.
2-6. RS422Wiring
The RS-422 mode supports 4 wire full duplex operation.

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3. Terminal Resister
VE11U 485 hardware has Terminal resistor built in, user may add external terminal resistor if require.
The external terminal resister connection as below.
3-1. RS422 terminal resistor connection
3-2. RS485 terminal resistor connection
3-3. Terminal Resistor Specification
110 ohm: If distance between both end of RS422/485 devices in 1.2KM.
220 ohm: If distance between both end of RS422/485 devices in 600M.
330 ohm: If distance between both end of RS422/485 devices in 300M.

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DRIVER INSTALLATION GUIDE
1. Double click on US-101-USB Drivers
2. Install CP210x_VCP_Win2K_XP_S2K3 software
3. Choose NEXT
4. Choose ACCEPT

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6. Choose
Ins tall

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7. Finish
In case of any problems try installing through :
1. Go to C:\SiLabs\MCU\CP210x\Windows
2. Run CP210xVCPInstaller
3. Install

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4. Start Scanning hardware ( Don’t set up hardware now)
The PC needs to be restarted for installation of the drivers.
Connect the Converter
Check Device manager under Control panel for CP201 USB Drivers.

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Check for a new Com port in COM/LPT1 section, CP210 USB to UART Bridge.
This finishes the installation.
Connecting the Hardware :
1. Connect a 485 cable as per diagram in section 2.
2. Connect the USB cable from the USB port of the converter to your USB device.
3. The Converter is ready for use.
P.O Box: 234911, Dubai, UAE
Tel : [phone]
Fax : [phone]
E-mail : [e-mail]