LineEye SI-35USB User manual

[3000V High-voltage Resistant Isolation Type]
Interface Converter
USB⇔Serial Conversion Model
Instruction Manual
SI-35USB
SI-20USB
SI-55USB
The latest instruction manual is in the attached CD as PDF format.
(2st Edition)

Thank you for your purchase of SI series. To use it correctly, you
are advised to read and understand this instruction manual
thoroughly. Keep this together with the warranty.
 Notice 
Under the copyright laws, it is prohibited to reprint or duplicate any part or the whole of
this instruction manual without priority from LINEEYE CO., LTD. (“LINEEYE”)
All company and product names in this manual are trademarks or registered trademarks
of their respective companies.
The contents of this manual and specifications of the products are subject to change
without notice.
This manual has been designed and edited with great care to give you all information. If
you have any questions, feel free to direct your inquiries to LINEEYE.
LINEEYE makes no warranty or guarantee, either expressed or implied with respect to
its quality, performance, merchantability, or fitness for a particular purpose. LINEEYE
shall not be liable for direct, in-direct, special, incidental, or consequential damages
resulting from any defect in the product. The warranty and remedies set forth above are
exclusive and in lieu of all others.
Introduction
Copyright © 2006-2015 LINEEYE CO., LTD. All right reserved.

Be sure to read the following.
LINEEYE has developed and manufactured this product for purpose of using with electrical devices
such as a computer, a personal device, a measurement device, semiconductor manufacturing equipment,
a vending machine, a sequencer, display equipment and so on. LINEEYE does not manufacture this
product under the purpose of using with equipment which may cause malfunction to do harm to the
human body: control equipment for nuclear, aircraft equipment, life maintenance equipment, traffic
signals, etc. Therefore, LINEEYE makes no guarantee with the mentioned-above use. If you use this
product for the purposes mentioned above, please contact LINEEYE considering safety like Fail Safe
under your responsibilities.
Danger Level
Warning
Should the device be used without following these symbols, there is a possibility
of accidents, such as a death or a serious injury, occurring.
Caution
Should the device be used without following these symbols, there is a possibility
of accidents, such as an injury and material damage, occurring.
* “Injury” indicates injury, burn, an electric shock, or the like which does not require hospitalization or the extended
hospital visit. “Material damage” indicates damage related to a house, a building, furniture, apparatus, livestock or a
pet.
Safety Information

Do not disassemble or modify the converter .
This may cause overheating, a fire, an electric shock, injury or unit malfunction.
Stop using the converter immediately when smoke, smells, or unusual sound emanates from itself.
Continuous use may cause a burn, fire, or electric shock.
Keep the products dry. Keep them away from water.
Failure to do so may cause overheating, an electric shock, or unit malfunction.
Do not insert the metal scrap or the rubbish such as lead wires into the opening.
Doing so may cause overheating, an electric shock, or unit malfunction.
Never touch the converter and AC adapter with wet hands.
Doing so may cause an electric shock.
Never use the converter in the place where an inflammable gas leaks.
Doing so may cause ignition.
Do not conduct the installation or wiring work when power is applied.
Doing so may cause an electric shock or unit malfunction.
Do not use the damaged cables.
Doing so may cause fire by overheating.
Do not install the converter in the unstable or vibrating place.
Doing so may cause unit malfunction or injury.
Do not install the converter in any temperature and humid places, or any places
which has the extreme temperature change.
Doing so may cause unit malfunction.
Do not install the converter in any places exposed to direct sunlight.
Doing so may cause a burn or unit malfunction by overheating.
Be sure not to short-circuit the pins on the connector.
Doing so may cause unit malfunction or injury.
Warning
Caution

 Contents 
Chapter1 Before Using The Product.............................................................................................................................. 1
1-1. Overview ..................................................................................................................................................................... 1
1-2. Specifications .............................................................................................................................................................. 2
1-3. Unpacking and Product Composition ........................................................................................................................ 2
1-4. CD-ROM Included ...................................................................................................................................................... 2
1-5. Mounting Arrangement.............................................................................................................................................. 2
Chapter2 Driver Installation and Usage....................................................................................................................... 3
2-1. Driver Installation for Windows XP .......................................................................................................................... 3
2-2. Driver Installation for Windows Vista, 7/8................................................................................................................ 8
2-3. The Way to Confirm the Installed Driver............................................................................................................... .11
2-4. Usage of Virtual COM Port Driver………………………………………………………………………………………….. 11
Chapter3 SI-35USB Usage........................................................................................................................................... 12
3-1. Overview and Features............................................................................................................................................. 12
3-2. Panel Explanation .................................................................................................................................................... 13
3-3. Hardware Setup........................................................................................................................................................ 14
3-4. Cable Connection ...................................................................................................................................................... 16
Chapter4 SI-20USB Usage...............................................................................................................................................
This model is for use in Japanese. Please refer to the Japanese Manual.
Chapter5 SI-55USB Usage...............................................................................................................................................
This model is for use in Japanese. Please refer to the Japanese Manual.
Chapter6 Warranty and After-Sales Service ............................................................................................................... 18
6-1. Troubleshooting ........................................................................................................................................................ 18
6-2. Loop-back Test by Communication Software .......................................................................................................... 18
6-3. Warranty and Repair................................................................................................................................................ 21
6-4. After-Sales Service.................................................................................................................................................... 22

1
Chapter1 BeforeUsingtheProduct
1-1.Overview
This unit is an interface converter that converts PC’s USB port to an RS-232C, RS-422, or RS-485 port. A
photo coupler and an isolation transformer electrically isolate the USB port from the conversion port,
which is ideal for FA equipment and medical equipment that require high safety and reliability. It is able to
access the USB port as a COM port using the application software by virtual COM port driver.
1-2.Specification
*1: Single wire: 0.2-2.5 mm2. Stranded wire: 0.2-1.5 mm2, AWG24 to 14. Refer to [3-4 Cable Connection]
for more details.
*2: Speed is established in application software. Certain speed beyond 1.2Mbps cannot be established.
(SI-35USB/SI-20USB)
*3: SI-35USB can control the transmission timing by using the line monitor function (refer to [3-1])
*4: Supports 32bit/64bit Windows 8/7. Cannot help any problems occurred on Windows ME/98SE/98.
S
p
ecifications
SI-35USB SI-20USB SI-55USB
Conversion USB⇔RS-422/485 USB⇔RS-422 USB⇔RS-232C
USB Interface RS-422/485
5 pole terminal block (5.08mm
press-to-screw pitch type*1) Rated
torque/ Screw size: 0.25Nm/M3
RS-422
DSUB 9pin (male)
Screw #4-40UNC
RS-232C
DSUB 9pin (male)
Screw #4-40UNC
Built-in terminater ON/OFF.
Line monitor, Auto driver control.
Built-in Terminater
SD, RD, RTS, CTS
conversion
DTE
(Equivalent to PC com port)
Asynch Type
Baud Rate 300 to 1Mbps *2
Data Frame
Flow Control
Surge Protection
Isolation Protection
System
Requirements
LED
Power USB Bus power, DC5V±10%,
Max. 250mA USB Bus power, DC5V±10%, Max. 230mA USB Bus power, DC5V±10%, Max. 270mA
Temperature
Humidity
Dimension
& Weight 65(W)×90(D)×22(H)mm Approx. 200g
Mounting Method
Composition
PC: PC/AT compatible with USB port (DOS/V PC)
OS: Microsoft Windows 8/7/Vista/XP/ME/87SE/98 *4
USB1.1/2.0, full speed transmission B connector
Data bits[7or8] + Parity[Even/Odd/none] + Stop bits[1/2]
300 to 3Mbps*2
Asynch
Using M3 screw hole in the bottom face, installation to a DIN rail (SI-DIN70 is required.)
USB cable (1.8m), Utility CD, Instruction manual, Warranty.
Serial Interface
Transmission: TXD, Reception: RXD, Power: PWR
In operation: -10 to 55°C, In storage: -20 to 75°C
In operation: 10 to 90%RH, In storage: 10 to 90%RH (No condensation)
65(W)×95(D)×22(H)mm
Approx. 200g
Xon/off, RTS/CTS*3 (supported by COM port emulator)
15KV ESD
3000Vdc

2
1-3.UnpackingandProductComposition
Make sure of the following when unpacking the product:
Converter : 1
USB cable : 1
Utility CD-ROM : 1
Instruction Manual : 1
Warranty : 1
Please let your LINEEYE distributor or LINEEYE know if you find any damage to the product caused by
transportation, or if there are accessories lacking.
1-4.CD-ROMIncluded
This CD-ROM includes the document file such as the instruction manual, and driver for Windows to
connect it to the PC, and software for communication loop-back test. There are two folders for Windows
driver for your appropriate OS.
Folder name Supported OS
/siusb_drivers/NT Windows 8/7/Vista/XP
/siusb_drivers/98ME Windows ME/98SE/98
1-5.MountingArrangement
Place this unit in the flat and stable place. To mount it onto the other device, use the M3 screw holes in the
bottom face. To mount it on a DIN rail (SI-DIN70 is required), use the M3 screw holes and tight it together
with DIN rail mounting plate (SI-DIN70).
Notice: Use the screws that can be inserted less than 6mm from the surface line.
If it is inserted deeper, it may damage the circuit.

3
Chapter2 DriverInstallationandUsage
When connecting this converter to a USB port of the PC for the first time, an installation of the driver is
necessary for the USB port. In this installation process, you need to install two drivers (USB driver for the
converter and COM port driver).
(This instruction is for Windows XP, Windows Vista, and Windows7/8. If you install the drivers into other
OS, install the drivers from attached CD, following the instructions of installation-wizard. Captured
images of this instruction are for SI-35USB, however, the procedure is same for SI-20USB and SI-55USB.)
If your PC has several USB ports, it is recommend using the specific USB port. Because driver installation
is necessary for each USB port to which you connect this converter for the first time.
2-1.DriverInstallationforWindowsXP
1. Insert the attached CD-ROM into the CD-ROM Drive of PC.
2. Connect this converter with the USB port of the PC.
When the following message appears, select "No, not this time", and then click “Next” button.

4
3. When the following message appears, select "Install from a list or specific location (Advanced)", and then
click “Next” button.
4. When the following message appears, select "Search for the best driver in these locations" and “Search
removable media (floppy, CD-ROM…)”, and then click “Next” button.

5
5. When the following message appears, click “Continue Anyway” button.
6. The following message appears and the install of the first driver has completed.

6
7. Next, the following message appears, select "No, not this time", and then click “Next” button.
8. When the following message appears, select "Install from a list or specific location (Advanced)”, and then
click “Next” button.

7
9. When the following message appears, select "Search for the best driver in these locations" and “Search
removable media (floppy, CD-ROM…)”, and then click “Next” button.
10. When the following message appears, click “Continue Anyway” button.

8
11. The following message appears and the install of the second driver has completed.
.
2-2DriverInstallationforWindowsVista/7/8
Note: Please do not connect the converter to the USB port and PC until the procedure 7. is completed.
This part of the instruction is for Windows 7, but you can install the driver in Windows Vista/8 in the same
procedure.
1. Insert the attached CD-ROM into the CD-ROM Drive of PC.
2. Run “setup.exe” file in “/siusb drivers/nt” folder in the CD-ROM. The following message appears, and
then click “Yes” button.

9
3. Click “OK” to start install of the driver package.
4. Then the installation wizard runs. Click “Next” button.
5.Click “Install” button to install the first driver.
Mark the box and this message will not show from then on.

10
6. Then, the following message (installation of the driver for Serial-USB Converter Port) appears, click
“Install” button.
7. Click “Finish” button to finish the installation of the driver package.
8. Connect the USB connector to the USB port. Then following message will appear when the PC
recognizes it. This message will appear every time you connect the converter to other USB ports for the
first time.
9. The driver Installation has completed.

11
2-3.TheWaytoConfirmtheInstalledDriver
From “Start” menu →“Control Panel ” →(“Performance and Maintenance” in case of WindowsXP) →
“System”, and display “System Property”. Run “Device Manager” on the “hardware” tab.
Confirm that the name of the converter is shown in the items of Ports (COM & LPT) and Universal Serial
Bus Controllers.
2-4.UsageofVirtualCOMPortDriver
After the installation of the drivers, the serial port of the converter can be accessed from application
software in the same way as Windows standard COM port.
[ Precautions for usage ]
Virtual COM port number is the number shown in the Ports (COM & LPT) items of the device manager
when this converter is connected with PC.

12
Soon after the connection of this converter to a USB port or when starting PC, conditions of RTS and DTR
of virtual COM port vary for several seconds depending on the OS. This situation occurs because of “Plug
and Play” recognition procedure of Windows. In actual use, please confirm the influence for connected
devices.
Virtual COM port number and ON/OFF of “Plug and Play” recognition can be changed from virtual COM
port property of device manager. For further detail, please refer to technical guides of Windows.
Chapter 3 SI-35USB Usage
3-1.SI-35USBOverviewandFeatures
SI-35USB is a USB converter that converts USB port of PC into RS-422/RS-485, which enables to transmit
for a long distance and multi-drop bus connection.
This device is suitable for use in situations in which security and reliability are needed because the GND of
the port of RS-422/485 and the GND of the USB port are electrically isolated with high-voltage resistant
insulation
Block diagram
GND
USB B type
Connecter
RS-422 / 485
terminal block
TXD
RXD
TxDEN
Photo-coupler &
Isolated Power Unit
D＋
D－
USB controller RS-422 IC
TR+
TR-
USB controller:
FT232(FTDI)
or equivalent
RS-422 IC :
MAX3088(MAXIM)
or equivalent
※IC has Failsafe Receiver.
MUX
Line monitor function circuit
Driver control circuit
SW-B1
SW-A5
MUX
MUX
SW-A4
RTS
DTR
CTS
GND
SW-A1-A3
SW-B2 SW-B4
SW-B3
R+
R-
100Ω
100Ω

13
< Line Monitoring Function >
RS-485 communications of two-wire half duplex is required to send data after confirming that any devices
have not sent data into the RS-485 line.
The line monitoring function allows detect that any devices have not sent data into the RS-485 line, and to
turn CTS signal to active and inform it.
RS-485 Line Condition Flow Control Condition
The period of time from when to detect a space bit of the data
in the RS-485 line sent by another device, to when not to get to
continuously detect a space bit over internal timer time of the
converter, while the converter is not sending data.
While the RTS/CTS flow control of virtual
COM port is activated, CTS signal will be
non-active. Transmission from the converter to
RS-485 line will be prohibited.
Other conditions While the RTS/CTS flow control of virtual
COM port is activated, CTS signal will be
active. Transmission from the converter to
RS-485 line will be permitted.
3-2. Panel Explanation
(1) Power
Supply LED Lights when USB bus power is supplied
(2) Data Status
LED
Indicates a data transmission/ reception status for RS-422/485.
Blinks the TXD LED if there is data from USB to RS-422/485.
Blinks the RXD LED if there is data from RS-422/485 to USB.
(3) Dip Switch
(SW-A) Selects the line monitoring function and driver control.
(4) Dip Switch
(SW-B) Selects the communication method, terminator, etc.
(5) USB
Connector
Standard B
Connect to USB port of PC
(6)
RS-422/485
Terminal
Block
5.08mm pitch 6pole terminal block (Press-to-screw type)

14
5 Pole Terminal Block Pin Assignment for RS-422/485
Terminal
No. Name
Full Duplex Mode *1 Half Duplex Mode *1
I/O
Direction
*2
Description
I/O
Direction
*2
Description
1 TR+ Out
Transmission Data + I/O Transmission/Rece
ption Data +
2 TR- Out
Transmission Data – I/O Transmission/Rece
ption Data –
3 GND - Signal Grand *4 - Signal Grand *4
4 R+ In Reception Data + - Cannot use *3
5 R– In Reception Data – - Cannot use *3
*1 Can switch by the dip switch.
*2 “Out” means a direction to output signals from the converter.
“In” means a direction to input signals to the converter.
“I/O” means both directions to input and output.
*3 Do not connect anything when using the half duplex mode.
*4 Connect GND to prevent devices from over voltage damage.
3-3.HardwareSetup
The two dip switches on the converter allows you to conduct the following setups: the
line monitoring function, the driver control method, terminator enable/disable, and echo back
enable/disable.
■SW-A No. 1-3 (Baud Rate Setup)
When using the line monitoring function or RS-485 driver control by RTS/DTS signal (when SW-A No.4 is
ON), set this converter referring to the table below depending on the speed.
Speed (bps)
[ ] indicates a representative
example.
SW-A Internal Timer *1
(usec)
No.1 No.2 No.3
Over 9600 [9600] OFF OFF OFF 1350
Over 19200 [19200] ON OFF OFF 677
Over 38400 [38400, 57600] OFF ON OFF 338
Over 71800 [76800, 115.2k] ON ON OFF 169
Over 150k OFF OFF ON 85
Over 300k ON OFF ON 42
Over 300 [300, 600, 1200] OFF ON ON 43200
Over 5400 [2400, 4800] ON ON ON 5400
*1 The internal timer is accurate at +10 to -10%.
■SW-A No.4-5 (Driver control)
Selects two kinds of control methods in the RS-422/485 driver control line of the converter:
manual and auto.
SW-A Meaning OFF ON
No.4 RS-422/485 transmission driver control Auto Manual
No.5 Driver control signal (Manual mode) DTR RTS

15
 When SW-A No.4 is OFF (Auto mode)
When using RS-485 (half duplex mode) normally set it as Auto mode. Right before starting the
transmission of data string from the converter to RS-485 line, the driver turns to active. After finishing the
transmission, the driver promptly turns to non-active.
 When SW-A No.4 is ON (Manual mode)
Control the sending driver by RTS/DTR signal from virtual COM port selected by SW-A No.5. By activating
RTS/DTR signal before sending data, the driver immediately turns to active. After finishing the
transmission of data RTS/DTR, turns to non-active. Then, the driver turns to non-active after reaching the
time of internal timer. Use this mode to control when you want to keep the driver active on the RS-422 line.
 When SW-A No.5 is OFF (DTR)
Control the driver by DTR signal when SW-A No.4 is ON (Manual mode).
 When SW-A No.5 is ON (RTS)
Control the driver by RTS signal when SW-A No.4 is ON (Manual mode).
■SW-B No.1 (Echo Back Setup)
When you communicate in the half duplex RS-485 mode, setting this switch to ON prohibits
the data, which is sent from the converter to the RS-485 line, is echoed back to the LAN host.
Therefore, while the driver is active, the ON setting makes the receiver non-active. The full
duplex RS-422 mode does not echo back data even when this switch is in the OFF setting.
■SW-B No.2 (Line Mode)
Selects the RS-422/485 line specification which is connected to the converter.
･OFF (Half Duplex) Setting
This setting makes the converter operate in the half duplex RS-485 mode. Communicated
data is sent and received through TR+ and TR- terminals.
･ON (Full Duplex) Setting
This setting makes the converter operate in the full duplex RS-422 mode. Communicated
data is sent from TR+ and TR- terminals, and is received to R+ and R- terminals.
SW-B Meaning OFF ON
No.1 Echo reception of transmission data With echo back Without echo back
No.2 Select a line mode RS-485 (half duplex) RS-422(full duplex)
No.3 Terminal control between TR+ and TR-. TR signal
Without terminal control
TR signal
With terminal
control(100 ohm)
No.4 Terminal control between R+ and R-. R signal
Without terminal control
R signal
With terminal
control(100 ohm)