EasySync Ltd
Unit 1, 2 Seaward Place, Centurion Business Park, Glasgow, G41 1HH, United Kingdom
Tel.: +44 (0) 141 418 0181 Fax: + 44 (0) 141 418 0110
E-Mail (Support): support@easysync.co.uk Web: http://www.easysync.co.uk
Neither the whole nor any part of the information contained in, or the product described in this manual, may be adapted or reproduced
in any material or electronic form without the prior written consent of the copyright holder. This product and its documentation are
supplied on an as-is basis and no warranty as to their suitability for any particular purpose is either made or implied. EasySync Ltd will
not accept any claim for damages howsoever arising as a result of use or failure of this product. Your statutory rights are n ot affected.
This product or any variant of it is not intended for use in any medical appliance, device or system in which the failure of the product
might reasonably be expected to result in personal injury. This document provides preliminary information that may be subject to
change without notice. No freedom to use patents or other intellectual property rights is implied by the publication of this document.
EasySync Ltd, Unit 1, 2 Seaward Place, Centurion Business Park, Glasgow, G41 1HH, United Kingdom. Scotland Registered Number:
SC224924
Copyright © 2010 EasySync Limited
The USB2-H-9002-M provides a simple method of adapting legacy serial devices with RS232 and
RS485 interfaces to modern USB ports by incorporating the FTDI FT2232H Hi-Speed USB bridge chip.
The adaptor which is contained within a metal case can be externally powered and can supply an
output of +5VDC @ up to 250mA on the 5mm terminal block connectors. Indicator LEDs provide
functional status.
had
EasySync Ltd
USB2-H-9002-M Hi-Speed USB to 2-Port
RS232/RS485 Adapter
Data Sheet
Document Reference No.: ES_000046
Version 1.0
Issue Date: 2010-06-15
Document Reference No.: ES_000046
USB2-H-9002-M Hi-Speed USB to 2-Port RS232/RS485 Adapter Data Sheet
Version 1.0
Clearance No.: ES #33
©2010 EasySync Ltd. 2
1 Introduction ................................................................................... 4
1.1 Functional Description .................................................................................. 4
1.2 LED Description ............................................................................................. 5
1.3 Block Diagram ............................................................................................... 5
1.3.1 Block description ....................................................................................... 5
1.4 Features ........................................................................................................ 6
1.5 Performance Figures ..................................................................................... 8
1.6 Ordering Information .................................................................................... 8
2 Installation ..................................................................................... 9
2.1 Example Applications and Configurations ..................................................... 9
2.2 Hardware Configuration ................................................................................ 9
2.2.1 Mounting .................................................................................................11
2.3 Device Driver Installation ........................................................................... 12
2.3.1 Microsoft Windows ....................................................................................12
2.3.2 Mac OS X, Linux, Windows CE ....................................................................16
3 Connections .................................................................................. 17
3.1 External Connectors .................................................................................... 17
3.1.1 USB ........................................................................................................17
3.1.2 RS232 Connections ...................................................................................17
3.1.3 RS485 Connections ...................................................................................18
4 Electrical details ........................................................................... 19
4.1 USB ............................................................................................................. 19
4.2 RS232 ......................................................................................................... 19
4.3 PSU Input ................................................................................................... 19
4.4 RS485 ......................................................................................................... 20
4.5 Power Output .............................................................................................. 20
5 Mechanical Details ........................................................................ 21
6 Physical Environment Details ....................................................... 23
6.1 Storage ....................................................................................................... 23
6.2 Operating .................................................................................................... 23
7 Environmental Approvals & Declarations ...................................... 24
7.1 EMI Compatibility ........................................................................................ 24
7.2 Safety ......................................................................................................... 24
7.3 Environmental ............................................................................................. 24
7.4 Reliability .................................................................................................... 24
7.4.1 MTTF ......................................................................................................24
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USB2-H-9002-M Hi-Speed USB to 2-Port RS232/RS485 Adapter Data Sheet
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7.5 Import / Export Information ....................................................................... 25
8 Troubleshooting ........................................................................... 26
8.1 Hardware .................................................................................................... 26
8.2 Device Driver .............................................................................................. 26
8.3 Technical Support ....................................................................................... 27
9 Contact Information ..................................................................... 28
Appendix A - List of Figures and Tables ............................................. 29
Appendix B - Revision History ............................................................ 30
Document Reference No.: ES_000046
USB2-H-9002-M Hi-Speed USB to 2-Port RS232/RS485 Adapter Data Sheet
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©2010 EasySync Ltd. 4
1 Introduction
1.1 Functional Description
The USB2-H-9002-M adaptor is a USB to dual interface RS232 or RS485 level serial UART adaptor
incorporating FTDI’s FT2232H Hi-Speed USB2.0 (480Mb/s) to dual serial UART interface IC device. The
FT2232H handles all the USB signaling and protocols. The adaptor is housed in a metal enclosure and
provides a fast, simple way to connect devices with an RS232 or RS485 interface to USB.
The integrated electronics of the USB2-H-9002-M utilise the FTDI FT2232H and includes RS485 level
shifters and RS232 level shifters plus TXD/RXD LEDs to provide a visual indication of data traffic through
the adapter. Selection of RS232 or RS485 signalling is made using DIL switches on the front of the
adaptor. Each of the dual channels can be independently configured as either RS232 or RS485.
Figure 1.1 USB2-H-9002-M
Flexible mounting allows the USB2-H-9002-M to be used in a variety of applications, from a portable
adapter to accompany a laptop to permanent installations in industrial, commercial and retail locations.
The metal enclosure incorporates a standard USB-B client connector for connection to an upstream host
or hub port. RS232 and RS485-level signals are available on two 5mm terminal block connectors. The
maximum RS485-level data rate is 10Mbps and the maximum RS232-level data rate is 1Mbps.
The adapter can be independently powered using an external +5V DC (1A) power supply which connects
via a 2.1mm jack socket. It can also be powered from the USB interface if required.
The USB2-H-9002-M adapter requires USB device drivers, available free from http://www.easysync-
ltd.com. These are used to make the USB2-H-9002-M appear as a Virtual COM Port (VCP). This allows
existing serial communications software, such as HyperTerminal, to exchange data through the USB2-H-
9002-M to a legacy RS485 or RS232 peripheral device.
Document Reference No.: ES_000046
USB2-H-9002-M Hi-Speed USB to 2-Port RS232/RS485 Adapter Data Sheet
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1.2 LED Description
The USB2-H-9002-M uses 5 LEDs to indicate a valid link as well as data traffic according to the following
table:
LED
Color
Function
Description
Quantity
Yellow
PWR
ON when USB2-H-9002-M is powered, configured and ready for use.
1
Red
TxD Activity
Flashes when data is transmitted from the USB2-H-9002-M to the
attached RS232 or RS485 device. One LED for each UART channel
2
Green
RxD Activity
Flashes when data is transmitted from the attached RS232 or RS485
device to the USB2-H-9002-M. One for each UART channel.
2
Table 1.1 – LED Description
1.3 Block Diagram
FTDI FT2232H
Hi-Speed USB Serial
Bridge
RS485
Level
Shifter
USB B
Client
Connector
3Pin 5mm
Terminal
Block
Channel 1
Channel 2
RS485
Level
Shifter
3Pin 5mm
Terminal
Block
RS232
Level
Shifter
9Pin 5mm
Terminal
Block
RS232
Level
Shifter
9Pin 5mm
Terminal
Block
Switch
circuit
Switch
circuit
Figure 1.2 USB2-H-9002-M Block Diagram
1.3.1 Block description
USB standard B Client Connector
USB B Client Connector
This connector provides the interface for connection to a USB Host or Hub port. A standard “A to B”
cable is provided, though one of a different length may also be used. The maximum cable length is 5
meters, according to the USB 2.0 specification.
FTDI FT2232H
FT2232H Hi-Speed USB2.0 (480Mb/s) is a dual serial UART interface IC device. Operating system device
drivers are required in order to work with the FT2232H to provide the Virtual COM Port serial
functionality.
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USB2-H-9002-M Hi-Speed USB to 2-Port RS232/RS485 Adapter Data Sheet
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Dual RS485 Level Shifter
The RS485 level shifter converts the signals provided by the FT2232H into the voltage levels required by
RS485 devices.
RS485 connectors
Two 3 pin 5mm terminal block connectors provide the connection to RS485 peripherals devices. These
are CN5 for channel 1 and CN9 for channel 2 (The RS485 and RS232 share the same GND pin which is
the middle pin of these connectors).
Dual RS232 Level Shifter
The RS232 level shifter converts the signals provided by the FT2232H into the voltage levels required by
RS232 devices.
RS232 Connectors
Two 8 pin 5mm terminal block connectors provide the connection to RS232 peripherals devices. These
are made up from 3 connectors CN2, 3 and 4 for channel 1 and CN6, 7 and 8 for channel 2 The RS232
and RS485 share the same GND pin.
Switching circuit
The switching circuit configures which mode, RS232 or RS485, is set for each channel. The switches SW1
and SW2 also enable or disable certain functions.
1.4 Features
Adds dual RS-232 or RS-485 serial port by connecting to a USB 2.0 Hi-Speed interface.
RS-485 Echo and non-Echo modes selection.
RS-485 Termination ON and Termination OFF mode selection.
Easy plug & play installation and RS-232/RS-485 device connection
Provide USB2.0 Hi-Speed(480Mbps) interface and works with USB 1.1 & 2.0 Host and Hub ports
Industry Standard FTDI chip set & device drivers for maximum compatibility
Microsoft Windows® WHQL-certified, Mac OS X, Linux and Windows CE device drivers
Installs as a standard Windows COM port
COM port number can be changed to any available COM port number, to support HyperTerminal,
or any other serial communications software application running in Windows
Supports Windows 7.0. Server 2008, 2003, Vista, XP, 2000, Linux, Mac OS X
FIFO: 4k byte transmit buffer, 4k byte receive buffer
RS-485 data signals: Data+, Data-, GND
RS-232 data signals: TxD, RxD, RTS, CTS, DTR, DSR, DCD, RI, GND
Selectable +5VDC Power source from USB port or external power adapter.
RI pin can be configured to provide +5VDC output at 250mA.
Set in RS232 mode, the serial port operates up to 1Mbps
Set in RS485 mode, the serial port operates up to 10Mbps
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Serial Communication Parameters
o Parity: None, Even, Odd
o Data bits: 7, 8
o Flow control: X-ON/X-OFF, None (set in RS485 mode)
o Flow control: RTS/CTS , DTR/DSR, X-ON/X-OFF, None(set in RS232 mode)
LEDs indicate RxD, TxD and power for monitoring port status.
Operating temperature of -40°C to +85°C
USB cable of 0.9 meter included
FCC and CE approved (submitted for test at time of writing datasheet).
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USB2-H-9002-M Hi-Speed USB to 2-Port RS232/RS485 Adapter Data Sheet
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1.5 Performance Figures
Parameter
Performance
USB Interface
480Mbps USB 2.0 Hi-Speed
RS485 Interface
Standard Windows baud rates (300bps to 921.6Kbps)
Custom baud rates (300bps to 10Mbps) through baud rate aliasing.
See FTDI Application Note AN_120: Aliasing Baud Rates
RS232 Interface
Standard Windows baud rates (300bps to 921.6Kbps)
Custom baud rates (300bps to 1Mbps) through baud rate aliasing. See
FTDI Application Note: AN_120: Aliasing Baud Rates
Table 1.2 - Performance Figures
1.6 Ordering Information
Part Number
Description
USB2-H-9002-M
Hi-Speed USB to 2-Port RS232/RS485 adaptor with metal case
Table 1.3 - Ordering Information
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USB2-H-9002-M Hi-Speed USB to 2-Port RS232/RS485 Adapter Data Sheet
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2 Installation
2.1 Example Applications and Configurations
2.2 Hardware Configuration
The USB2-H-9002-M supports 2 serial channels. Easy can be independently set as either RS232 or RS485.
Channel configuration is done using switches SW1 and SW2. Various jumpers also allow power supply
source and pull-up/pull-down termination resistors.
Switch SW1 and SW2 Settings
The default SW1 switch settings enable RS485 mode. This can be changed as shown in the following
table:
SW1
Position
Channel 1
configuration
SW2
Position
Channel 2
configuration
Open
(off)
Closed
(on)
1
1
RS232 mode
RS485 mode
2
2
RS485 Echo
enabled
RS485 Echo disabled
3
3
120R Termination
resistor enabled
120R Termination resistor
disabled
4
4
5V Out Disable
5V Out Enable
Table 2.1 – Switch Setting Configuration of the USB2-H-9002-M
The following gives a brief description of the SW1 and SW2 switches.
Modes:
The USB2-H-9002-M can be configured as either an RS232 or RS485 serial interface.
Echo:
When the serial interface is set to RS485, then echo can be enabled or disabled.
Termination:
The USB2-H-9002-M has a 120Ω termination resistor which can be switched in or out of the circuit when
the channel is used in RS485 mode.
5V Out:
The RI pin of each channel can alternatively be used to output a +5V supply if the RI function is not
required. This +5V supply is available after the USB2-H-9002 is fully enumerated and device drivers are
loaded.
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Jumper Settings
There are various jumpers on the adaptor PCB. These can be used to select the functions described in the
following table:
Channel
Jumper
Connections made
Function
1 and 2
JP1
1-2
Power supplied from USB Host 5V
2-3
(default)
Power supplied from +5V power jack input.
1
JP2
connected
(default)
Connects the +5V output onto the channel 1 RI output pin if
the +5V has been enabled. Requires position 4 of SW1 closed.
not connected
Disconnects the +5V output onto the channel 1 RI output pin if
the +5V has been enabled.
JP3
connected
(default)
750Ω pull-up bias resistor on channel 1 RS485 Data + is
connected in circuit
not connected
750Ω pull-up bias resistor on channel 1 RS485 Data + is NOT
connected in circuit
JP4
connected
(default)
750Ω pull-down bias resistor on channel 1 RS485 Data - is
connected in circuit
not connected
750Ω pull-down bias resistor on channel 1 RS485 Data - is
NOT connected in circuit
2
JP5
connected
(default)
Connects the +5V output onto the channel 2 RI output pin if
the +5V has been enabled. Requires position 4 of SW2 closed.
not connected
Disconnects the +5V output onto the channel 2 RI output pin if
the +5V has been enabled.
JP6
connected
(default)
750Ω pull-up bias resistor on channel 2 RS485 Data + is
connected in circuit
not connected
750Ω pull-up bias resistor on channel 2 RS485 Data + is NOT
connected in circuit
JP7
connected
(default)
750Ω pull-down bias resistor on channel 2 RS485 Data - is
connected in circuit
not connected
750Ω pull-down bias resistor on channel 2 RS485 Data - is
NOT connected in circuit
Table 2.2 –Jumper Selection of USB2-H-9002-M
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2.2.1 Mounting
The USB2-H-9002-M can be wall mounted using the mechanical metal brackets.
This is shown in the following figure
Figure 2.1 - USB2-H-9002-M Brackets
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2.3 Device Driver Installation
The USB2-H-9002-M adaptor drivers are available for download from:
http://www.easysync-ltd.com
2.3.1 Microsoft Windows
With the device drivers being Windows Hardware Quality Labs (WHQL) certified, they are also available
through download directly from the Microsoft® Windows® Update service. This is the best choice when
connecting the USB2-H-9002-M to a computer running Windows. Additional installation options are
noted below:
Installation Executable on Windows
1) Login to your system as Administrator, or a user with Administrator rights.
2) Prior to connecting the USB2-H-9002-M to the USB Host or Hub port, download the latest device
driver version from the EasySync web site.
3) Run this executable to install the device drivers.
4) Connect the USB2-H-9002-M to your computer. A notification will appear near the task bar
indicating that new hardware has been installed and is ready for use. It is normal if this notice
appears twice.
Figure 2.2 - Hardware Ready
Windows Update shown on Windows XP
You must have an active Internet connection and the Windows Update Service enabled.
1) Connect the USB2-H-9002-M to your USB Host or Hub.
2) The “Found New Hardware” Wizard will appear. The first dialog should ask whether it is
acceptable to use the Windows Update Service to find the device driver.
Figure 2.3 – Found New Hardware Wizard
3) Select one of the “Yes” choices and click “Next”.
4) The following screen appears:
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Figure 2.4 – Automatic Install
5) Wait while the driver is found, downloaded, and installed. This step may take a couple minutes
depending on the Internet speed.
6) After the files are found and installed, click “Finish” to complete the installation.
Figure 2.5 - Complete Hardware Installation
7) Steps 2 through 6 will repeat. The first time installs the basic USB Serial Converter in the USB
device tree. The second time installs the Virtual COM Port layer in the Ports tree and assigns the
COM port number.
8) Steps 2 through 7 will repeat for the second channel of the USB2-H-9002-M.
9) When both portions of the device driver have been installed successfully for both ports, the
following message will appear, indicating that the device is ready.
Figure 2.6 - Hardware Ready
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COM Port Assignment
Next, to determine which COM port has been assigned, open the Windows Device Manager from the
System Control Panel.
Figure 2.7 - Device Manager
Click on the Plus “+” sign next to the Ports tree to list the available COM port. You will see “EasySync
USB COM Port”, followed by a COMn assignment. And dual additional “EasySync USB Serial Converter
A” ,“EasySync USB Serial Converter B”.
Figure 2.8 - COM Port Assignment
To determine which COM port has been assigned to Converter A, B, the cursor point to the USB Serial
Port (COM10), (COM11), then right-click on it and select “Properties”, it shows their relationship to the
Converter A, B.
In the figure below, the Converter A is assigned to COM10; Converter B is assigned to COM11.
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Figure 2.9 – COM Port Assignment and Properties
Use this COM port number with your application software in order to access the USB2-H-9002-M.
If an application requires use of a different COM port number, the assignment may be changed through
the Advanced Driver Options settings.
From the above “Properties”, click on the “Port Settings” tab.
Figure 2.10 - Settings Tab
Then click on the “Advanced…” button.
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Figure 2.11 - Advanced Options
This will display the various advanced settings. Note the COM port assignment in the upper left. Clicking
on the drop-down list will display the available port numbers. Select one that is not in use and click OK
on each dialog box to activate the selection. Windows will remember this COM port number.
2.3.2 Mac OS X, Linux, Windows CE
Device drivers and FTDI installation guides for Mac OS X, Linux and Windows CE are available for
download on the EasySync web sites. Follow the respective FTDI installation guides for the chosen
operating system.
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3 Connections
3.1 External Connectors
3.1.1 USB
The USB2-H-9002-M is a downstream USB 2.0 Device and is connected via a standard USB-B client
connector to an upstream USB Host or Hub.
Pin Number
Pin Type
Description
1
Power
VBUS – USB Power provided from upstream USB Host or Hub
2
Bidirectional
D– = USB data signal, negative polarity
3
Bidirectional
D+ = USB data signal, positive polarity
4
Ground
GND = USB signal ground
Shield
Case Ground
Drain = typically connected to the host PC case
Table 3.1 – USB B Receptacle Pin-Out
3.1.2 RS232 Connections
Each RS232 port is connected through a 5mm terminal block connector. This is shown in the following
table:
Terminal Block Pin
Number (Channel 1
and Channel 2)
Pin Type
Description
1
Output
TXD = Transmit Data
2
Input
RXD = Receive Data
3
Output
RTS = Request To Send
4
Input
CTS = Clear To Send
5
Output
DTR = Data Terminal Ready
6
Input
DSR = Data Set Ready
7
Input
DCD = Data Carrier Detect
8
Input or PWR output
RI = Ring Indicator or +5V DC output
9
Ground
GND = RS232 signal ground
Table 3.2 – Connections required for RS232 serial interface
In addition, RI Pin can provide +5VDC to an external device with a maximum current draw of 250mA
once the USB2-H-9002-M has been enumerated by the system.
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3.1.3 RS485 Connections
Each RS485 port is connected through a 5mm terminal block connector. This is shown in the following
table:
Terminal Block Pin
Number (Channel 1
and Channel 2)
Pin Type
Description
8
Input or PWR output
Can be configured as PWR = +5V DC output
depending on SW settings and jumper settings
9
GND
GND
10
Input/Output
DATA+
11
Input/Output
DATA-
Table 3.3 – Connector of RS485 Pin-Out
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4 Electrical details
4.1 USB
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
USB_VCC
Input Power Voltage*
4.25
5.0*
5.25
V
*Present when USB
cable is attached and
USB Host or Hub
powered.
Icc
USB current***
100
150
mA
***Does not include
power supplied to
external device when
RI/PWD pin is
configured for +5V
output
Table 4.1 - USB Electrical Details
4.2 RS232
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Vtrans
Transmitter output
voltage swing
± 5
V
RL = 3KΩ
Vrec
Receiver input voltage
range
±2.4
±25
V
Input resistance = 3KΩ
to 7KΩ
ESD HBM
±15
KV
RS-232 Inputs and
Outputs
Table 4.2 - RS232 Electrical Details
4.3 PSU Input
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Vin
Power supply input
5.0
V
Maximum of 1A
Table 4.3 – PSU Input Details
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4.4 RS485
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Receiver Input
VCM
Common-mode input
voltage range
-7
+12
V
IN
Input Current
1.0
mA
VIN = +12V
-0.8
VIN = -7V
VTH
Differential Threshold
Voltage,VTH
-0.2
+0.2
V
VIHYST
Input Hysteresis
20
mV
RIN
Input Resistance, RIN
12
15
kΩ
Transmitter Output
VOD
Differential Output
Voltage,
dVOD
1.5
5
V
With RL = 54Ω.
CL = 50pF *
ESD Tolerance
ESD HBM
RS485 Inputs and
Outputs
±15
kV
EN61000-4-
2ContactDischarge
RS-485 Inputs and
Outputs
±8
kV
EN61000-4-
2AirGapDischarge
RS-485 Inputs and
Outputs
±15
kV
Table 4.4 – RS485 Electrical Details
4.5 Power Output
The USB2-H-9002-M assigns RI/PWR pin of RS232 interface (but can also be used in RS485 mode) to
provide +5V DC for an external device that requires power. The maximum allowable current that can be
supplied from the USB bus is 500mA, including the circuitry of the USB2-H-9002-M itself. Up to 250mA
(total on 2 ports) may be used by the external devices.
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
IO
Output Power Current
0
250
mA
total available current
for 2 ports
Table 4.5 - Power Output Option
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5 Mechanical Details
Table 5.1 - USB2-H-9002-M Case Dimensions - top
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Table 5.2 - USB2-H-9002-M Case Dimensions - top
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6 Physical Environment Details
6.1 Storage
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
T
Storage Temperature
Range
-65
+150
oC
Table 6.1 - Storage Temperature
6.2 Operating
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
T
Operating Temperature
Range
–40
+85
oC
5% to 95% RH,
non condensing
Table 6.2 - Operating Temperature
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7 Environmental Approvals & Declarations
7.1 EMI Compatibility
FCC and CE
The USB2-H-9002-M has been tested to be compliant with both FCC Part 15 Subpart B and European
EMC Directive.
NOTE: This is a Class B product. In a domestic environment, this product may cause radio interference,
in which case the user may be required to take adequate measures.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
Consult the dealer or an experienced radio/TV technician for help.
7.2 Safety
The USB2-H-9002-M is defined as Limited Power Supply (LPS) device, with operating voltages under
60VDC.
7.3 Environmental
The USB2-H-9002-M is a lead-free device that complies with the following environmental directives:
RoHS, WEEE, REACH, PFOS and DecaBDE.
7.4 Reliability
The USB2-H-9002-M is designed as a robust USB-Serial adapter for use in many environments. There
are no user-serviceable parts. Any failure will require a replacement of the unit.
7.4.1 MTTF
The Mean Time To Failure is calculated at TBD hours.
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7.5 Import / Export Information
Import / Export Information
Country of Origin
China
Harmonized Code
8471.80.1000
Product Description
USB to RS232/RS485 Computer Adapter, Dual Ports
USA ECCN
EAR99 – No License Required
Table 7.1 - Import / Export Information
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8 Troubleshooting
8.1 Hardware
Cables are the most common sources of trouble with external devices.
Check the following:
- USB cable is properly inserted at both ends
- Computer powered is ON
- Computer is not in Sleep or Standby
- If a USB Hub is used, be sure it is set for “Self-Powered” operation
- If a USB Hub is used, be sure all cables are properly inserted
- If all the above are OK, the Yellow LED should be lit, indicating the device has been recognized by the
USB subsystem.
RS485 cables – check the following:
- Check for specific handshake requirements of your RS485 peripheral.
- Because there are no handshake signals, ensure the application is set to “No Hardware Handshake”,
or equivalent.
- Test the port with a loop-back connector. Connect DATA+ to DATA+, DATA- to DATA-. Use a simple
terminal program to check that data is transmitted and received.
RS232 cables – check the following:
- Output signals (TXD, RTS, DTR) are connected to the respective inputs (RXD, CTS, DSR) in each
direction.
- Check for specific handshake requirements of your RS232 peripheral.
- If handshake signals are note used, ensure the application is set to “No Hardware Handshake”, or
equivalent.
Test the port with a loop-back connector. Connect TXD to RXD, RTS to CTS and DTR to DSR. Use a
simple terminal program to check that data is transmitted and received.
8.2 Device Driver
Ensure the latest device driver is in use. See http://www.easysync-ltd.com.
If other devices with FTDI chips are installed in the system, check with all manufacturers of these devices
for the latest device drivers.
See the FTDI installation guides for additional details: http://ftdichip.com/FTDocuments.htm
Common Windows Device Driver Troubles:
DEVICE TIMES OUT: The default settings of the device driver assume typical data transfers of
hundreds to thousands or more bytes at a given time. Some applications, such as a GPS device,
only send data in short packets, often only a few bytes. If this is the case, it may be necessary
to adjust the drivers buffer size and/or latency timer to smaller values. These values can be
adjusted through the advanced driver options as noted in Figure 2.12. The buffer size can be
reduced to 64 bytes. The latency timer can be set as low as 2ms. A setting of 1ms will cause
unnecessary USB traffic and could adversely affect data transmission.
ERRATIC MOUSE POINTER: The device driver defaults to query an attached device to find out
whether it is a mouse or modem, consistent with native COM port operation. Some RS485
peripherals constantly send short packets of data, causing the host system to “think” a mouse or
modem has been attached. These short packets will interfere with normal mouse operation
causing the pointer to jump around the screen. If this happens, disconnect the RS485 device and
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uncheck the Serial Enumerator option, also found on the Advanced driver options screen in Figure
2.11.
COM PORT IN USE: Windows keeps track of all COM port assignments. If multiple EasySync
products have been connected to a single system, the COM port number will increase, even if the
other devices are not attached. If the higher COM port assignments are not acceptable for the
application, known unused COM port numbers should be uninstalled according to the FTDI
installation guide: http://ftdichip.com/FTDocuments.htm
8.3 Technical Support
Technical support may be obtained from your nearest EasySync office. See details below.
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9 Contact Information
Head Office – Glasgow, UK
EasySync Limited
Unit 1, 2 Seaward Place,
Centurion Business Park
Glasgow, G41 1HH
United Kingdom
Tel: +44 (0) 141 418 0181
Fax: +44 (0) 141 418 0110
Branch Office – Hillsboro, Oregon, USA
EasySync Limited (USA)
7235 NW Evergreen Parkway, Suite 600
Hillsboro, OR 97123-5803
USA
Tel: +1 (503) 547 0909
Fax: +1 (503) 547 0990
E-Mail (Sales) sales@easysync-ltd.com
E-Mail (Support) support@easysync-ltd.com
E-Mail (General Inquiries) admin@easysync-ltd.com
Web Site URL http://easysync-ltd.com
Web Shop URL http://easysync-ltd.com
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Appendix A - List of Figures and Tables
List of Figures
Figure 1.1 USB2-H-9002-M ......................................................................................... 4
Figure 1.2 USB2-H-9002-M Block Diagram ................................................................. 5
Figure 2.1 - USB2-H-9002-M Brackets ...................................................................... 11
Figure 2.2 - Hardware Ready .................................................................................... 12
Figure 2.3 – Found New Hardware Wizard ............................................................... 12
Figure 2.4 – Automatic Install .................................................................................. 13
Figure 2.5 - Complete Hardware Installation ............................................................ 13
Figure 2.6 - Hardware Ready .................................................................................... 13
Figure 2.7 - Device Manager ..................................................................................... 14
Figure 2.8 - COM Port Assignment ............................................................................ 14
Figure 2.9 – COM Port Assignment and Properties ................................................... 15
Figure 2.10 - Settings Tab ........................................................................................ 15
Figure 2.11 - Advanced Options................................................................................ 16
List of Tables
Table 1.1 – LED Description ........................................................................................ 5
Table 1.2 - Performance Figures ................................................................................. 8
Table 1.3 - Ordering Information................................................................................ 8
Table 2.1 – Switch Setting Configuration of the USB2-H-9002-M ............................... 9
Table 2.2 –Jumper Selection of USB2-H-9002-M ...................................................... 10
Table 3.1 – USB B Receptacle Pin-Out ..................................................................... 17
Table 3.2 – Connections required for RS232 serial interface .................................... 17
Table 3.3 – Connector of RS485 Pin-Out ................................................................... 18
Table 4.1 - USB Electrical Details .............................................................................. 19
Table 4.2 - RS232 Electrical Details .......................................................................... 19
Table 4.3 – PSU Input Details ................................................................................... 19
Table 4.4 – RS485 Electrical Details ......................................................................... 20
Table 4.5 - Power Output Option .............................................................................. 20
Table 5.1 - USB2-H-9002-M Case Dimensions - top .................................................. 21
Table 5.2 - USB2-H-9002-M Case Dimensions - top .................................................. 22
Table 6.1 - Storage Temperature .............................................................................. 23
Table 6.2 - Operating Temperature .......................................................................... 23
Table 7.1 - Import / Export Information .................................................................. 25
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Appendix B - Revision History
Version draft First external draft for comment 2010-02-15
Version 1.0 First external release 2010-06-15
