CoolGear USB-COMi-TB User manual

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USB-COMi-TB
USB-COMi-TB USB to Industrial Single RS-422 / 485 Adapter Manual
The USB-COMi-TB USB-to-Industrial Single RS-422/485 Adapter is
designed to make industrial communication port expansion quick and
simple. Connecting to a USB port on your computer or USB hub, the
USB-COMi-TB instantly adds an industrial communication port to
your system. By taking advantage of the USB bus, the USB Industrial
I/O Adapter makes it easier than ever to add RS-422 or RS-485 device
to your system with easy plug-and-play and hot plug features.
Adapting the new technology, the industrial I/O communication port
expansion now takes the new bus with easy and convenient
connectivity.
Plugging the USB-COMi-TB to the USB port, the adapter is automatically detected and installed. There are no IRQ & COM
port conflicts, since the port doesn't require any additional IRQ, DMA, memory as resources on the system. The RS-422
/485 port functions as native Windows COM port, and it is compatible with Windows serial communication applications.
The USB Industrial I/O Adapter provides instant connectivity to RS-422/485 communication device for factory
automation equipment, multi-drop data collection devices, barcode readers, time clocks, scales , data entry terminals,
PC to PC long distance communications and serial communication in harsh environments. The USB Industrial I/O
provides industrial solution for applications requiring single node or multi-drop communications over short and long
distance.
Specifications and Features
•Adds a high speed RS-422 / 485 serial port via USB connection.
•384 byte receive buffer
•128 byte transmit buffer for high speed data throughput.
•Requires no IRQ, DMA, I/O port.
•Data rates: 300 bps to 1M bps.
•Connector: one 5-pin terminal block
•Auto transmit buffer control for 2-wire RS-485 half-duplex operation.
•Termination resistors installed on-board.
•RS-422 data signals: Tx-, Tx+, Rx+, Rx-, GND
•RS-485 data signals: Tx-, Tx+, Rx+, Rx- (4 wire), and data-, data+ (2 wire).
•Monitor LEDs of TxD, RxD indicating port status
•Easy operating mode configuration and setting
•Virtual COM port drivers provided for Windows 7, Vista, 2003, XP, 2000

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Hardware Installation
Inside the unit, there is one 3-pin DIP switch which is set to select the mode of operation. You will need to open up the
upper case (see below) and set the switch settings to RS-422 mode, or RS-485 mode, as per the requirements of your
application. After setting of switches, you then plug the adapter to USB port to start driver installation. The RS-422 & RS-
485 Mode Block Configuration Settings are listed as follows.
Push down the upper case and slide it to open
RS-422 & RS-485 Mode Block Configuration
SW (External DIP Switch) for Mode Setting
Operation Mode
S1
S2
S3
RS-422
4 wire with Handshaking
OFF
ON
OFF
RS-485
Full Duplex (4 wire)
ON
ON
OFF
Half Duplex (2 wire)
-With Echo
ON
OFF
OFF
Half Duplex (2 wire)
-Without Echo
ON
OFF
ON
3-Pin DIP switch for operation mode selection

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Inside the unit, there are 6x3 (18-pin) header block which are jumpered to enable Tx, Rx, 120 Ohm termination resistors
and Rx, Tx 750 Ohm biasing resistor. You will need to open up the case and set the jumper setting for RS-422 mode, or
RS-485 mode, as per the requirements of your application. Settings are listed as follows:
6x3 (18-pin) Header Block for Termination and Biasing Option Configuration
Jumper
Function
1-2
Enable
Tx+/- Termination of 120 Ohm.
This jumper should always be populated for RS485 half-Duplex mode.
2-3
Disable
4-5
Enable
Pull-up Tx+ to VCC by 750 Ohm Bias resistor.
This jumper should be populated for pull-up Tx+.
5-6
Disable
7-8
Enable
Pull-down Tx- to GND by 750 Ohm Bias resistor.
This jumper should be populated for pull-down Tx-.
8-9
Disable
10-11
Enable
Rx+/- Termination of 120 Ohm.
This jumper should always be populated for RS-422/485 full-duplex mode.
11-12
Disable
13-14
Enable
Pull-up Rx+ to VCC by 750 Ohm Bias resistor.
This jumper should be populated for pull-up Rx+.
14-15
Disable
16-17
Enable
Pull-down Rx- to GND by 750 Ohm Bias resistor.
This jumper should be populated for pull-down Rx-
17-18
Disable
Note: Sometimes, when operating in RS-422 or RS-485, it is necessary to configure termination and biasing of the data
transmission lines. Generally this must be done in the cabling, since this depends on the installation of connections.
Before applying the option, check your cable specification for proper impedance matching.
Biasing of data lines must only occur at a single point anywhere in the cabling. USB-COMi-TB provides biasing for ease of
installation. Please be sure to disable this inside the unit, if your cabling already provides biasing.
Termination must not be installed in the middle of the cable. It is only permitted at both ends. Since a computer
controlled serial port is almost always at one end of the cable, termination is disabled by default.

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Windows 7 / Vista / 2003 / XP / 2000 Driver Installation
You need to have administrator privileges to install any new drivers under Windows 7/ Vista / 2003 / XP / 2000. To
install the driver or update the configuration please log onto Windows as "Administrator" or ask your system
administrator to install the USB-COM driver.
You need to install driver first, prior to hardware installation. Do not connect the USB-to-Serial Adapter to the
USB port of your computer, before you finish driver installation.
Please proceed with the following steps to install the driver:
1. Insert the “USB COM Series Driver and Utility” CD into your CD-ROM.
2. The “USB COM Series Driver and Utility CD” dialog box appears.
3. Under “Driver Installation”, double click “Windows 7, Vista, 2003, XP, 2000 driver” to install the
device driver.
4. The USB COM install program will auto-detect the OS type and install the driver automatically.
(Note: in Windows 7 or Vista OS you will find another dialog box, please click on “OK” to confirm
the drivers install program).
5. After the message “FTDI CDM Driver installation process completed” appears, press “Enter” to complete the
driver installation.
6. Plug in the USB to Serial Adapter to the USB port of your computer. Windows will finish installing the driver files.
Check Installation
You can now verify the installation has been completed successfully by looking under Device Manager of the System
Properties screen. (Go there by Start-Setting- Control Panel-System Properties-Hardware-Device Manager.
The device should have installed as a "USB Serial Port (COMx)" attached to "USB Serial Converter ".
Change COM Port Properties and COM Port Number
This feature is particularly useful for programs, such as HyperTerminal, which only work with COM1 through COM4.
Please ensure that you do not change the COM Port Number already in use.

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To change the virtual COM port properties:
•Select the "USB Serial Port"
•Click “Properties”.
•Select "Port Setting" and “Advanced”.
•Click the drop down arrow on COM Port Number and scroll to the required COM port. Select "OK".
•Return to the Device Manager Screen. You will see that the USB Serial Port installation has been changed to the
new COM Port Number.
Uninstalling Windows 2003 / XP / 2000 Drivers
Please proceed with the following steps to uninstall the 2003/XP/2000 driver:
1. Insert the “USB COM Series Driver and Utility” CD into your CD-ROM.
2. The “USB COM Series Driver and Utility CD” dialog box appears.
3. Under “Driver Uninstalling”, double click “Windows 2003, XP, 2000 driver uninstall” to uninstall the device
driver.
4. When following dialog box appears, double click “Clean System” to uninstall the 2003/XP/2000 drivers.
5. You need to disconnect all USB to serial Adapters from your PC, when the message below appears. Double click
“OK” to start uninstalling Windows 2003/XP/2000 USB to Serial drivers.

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6. Double click “Yes” to confirm it.
7. Click “No” to proceed.
8. When the message “Status: System clean completed” appears, double click “Exit” to complete the USB to serial
drivers uninstall.
9. Press “Start” button and select “Control Panel”.

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10. Open the Add or Remove program.
11. Remove the first “Windows Driver Package – FTDI CDM Driver Package (…)”.
12. Click “Change/Remove” and “Yes” to remove the first Windows Driver Package.
13. Remove the second “Windows Driver Package – FTDI CDM Driver Package (…)”.
14. Click “Change/Remove” and “Yes” to remove the second Windows Driver Package.
15. Reboot the computer to complete the driver uninstall.
Uninstalling Windows 7 or Vista Drivers
Windows 7 and Vista have many new security features. You need to proceed with the following steps to uninstall the
Vista driver:
1. The USB to serial devices must connect to the PC.
2. Press “Start” button and select “Control Panel”.
3. Select “Classic View” from the top left hand corner and then “System” from the list.
4. Select “Device Manager” from the top left hand corner.

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5. Locate your device under the ports (COM & LPT) section and right click on it to bring up the menu shown.
6. Select uninstall and be sure to click the box for “Delete the driver software for this device” in the next window
and press “OK”.

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Note: if you have more than one USB Serial Port (COMx) installed in your PC, you need to repeat from step 5 to step 6
to delete the driver software for each port.
7. Locate your Device under the Universal Serial Bus Controllers section, and right click on it to bring up the menu
shown.
8. Select uninstall and be sure to click the box for “Delete the driver software for this device” in the next window
and press “OK”.

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Note: if you have more than one USB Serial Converter installed in your PC, you need to repeat step 7 and step 8 to
delete the driver software for all devices.
RS-422 Signal Pin-outs of Terminal Block
Pin 1
TxD- (A)
Pin 2
TxD+ (B)
Pin 3
RxD+ (B)
Pin 4
RxD – (A)
Pin 5
GND
RS-422 Signal Wiring
•Point-to-Point 4 Wire Full Duplex
RS-485 4-Wire (Full duplex) Signal Pin-outs of DB-9 Male
Pin 1
TxD- (A)
Pin 2
TxD+ (B)
Pin 3
RxD+ (B)
Pin 4
RxD– (A)
Pin 5
GND
RS-485 2-Wire (Half duplex) Signal Pin-outs of DB-9 Male
Pin 1
Data- (A)
Pin 2
Data+ (B)
Pin 5
GND

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RS-485 Signal Wiring
•Point-to-Point 4-Wire Full Duplex
•Multi-drop RS-485 2-Wire Half-duplex