SystemBase Multi-4U Ver1.7 User manual

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User Manual
www.sysbas.com
USB to Serial
Version 3.05.1 2020/11/20

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Revision History
Revision Date
Version
Pages
Description
July/14/2006
2.0
All
All new
Aug/02/2008
2.1
Partial
Partial edited
May/13/2009
2.2
Partial
Partial edited
May/26/2009
2.3
Partial
Partial edited
Oct./26/2009
2.4
Partial
Partial edited
Feb./06/2010
2.5
Partial
Partial edited
Oct./18/2010
2.6
Partial
Partial edited
Nov./16/2010
2.7
Partial
Partial edited
July/19/2011
2.8
Partial
Partial edited
Apr./10/2012
2.9
All
Partial edited
Apr./27/2016
3.0
Partial
Modify logo and driver setup page
May/09/2016
3.01
Partial
Added driver install/uninstall process
Aug/31/2017
3.02
Partial
Added port remap
March/21/2019
3.03
Partial
Added latching USB context
May/12/2020
3.04
Partial
Removed CD context
Nov/20/2020
3.05
Partial
Partial edited

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Contents
About Multiport(Multi-N) USB series ............................................................................................. 5
Multiport USB Specifications ......................................................................................................... 6
About latching USB ....................................................................................................................... 7
Connectivity Method...................................................................................................................... 8
RS232.......................................................................................................................... 8
RS422.......................................................................................................................... 9
RS485........................................................................................................................ 10
Termination Resistor.................................................................................................................... 12
Multi-1/USB Ver4.0...................................................................................................................... 14
- Specification ............................................................................................................. 14
1. RS232 Model .......................................................................................................... 15
2. RS422, RS485 Model.............................................................................................. 15
Multi-2/USB Ver4.0...................................................................................................................... 18
- Specification ............................................................................................................. 18
1. RS232 Model .......................................................................................................... 19
2. RS422, RS485 Model.............................................................................................. 19
Multi-4/USB Ver4.0...................................................................................................................... 22
- Specification ............................................................................................................. 22
1. RS232 Model .......................................................................................................... 23
2. RS422, RS485 Model.............................................................................................. 23
Multi-4U Ver1.7............................................................................................................................27
- Specification ............................................................................................................. 27
1. RS232 Model .......................................................................................................... 28
2. RS422, RS485 Model.............................................................................................. 28
Multi-8U Ver1.7............................................................................................................................33
- Specification ............................................................................................................. 33
1. RS232 Model .......................................................................................................... 34
2. RS422/RS485 Model............................................................................................... 34
Multi-4U/8U V1.6 .........................................................................................................................39
- Specification ............................................................................................................. 40
1. RS232 Model .......................................................................................................... 41
2. Combo (RS422/RS485) Model ................................................................................. 42
Manually Installing Windows Device Driver ................................................................................45
Automatic Driver Installation in Windows .................................................................................... 49
Windows Device Driver Setup.....................................................................................................50
Manually Removing Windows Device Driver ..............................................................................53
Automatic Driver Uninstallation in Windows................................................................................58
Serial port sorting program (USBSerial_Remap) ........................................................................59
Multi-4U/8U Version History ........................................................................................................ 60

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About Multiport(Multi-N) USB series
USB is a complex word of “Universal”, meaning all peripheral devices use the same connector, and “serial”, meaning
devices are connected as a daisy chain through serial transmission. USB is an interface suggesting a solution to
inconvenience and inefficiency caused by slow speed and limited device connection of existing external ports (serial
or parallel).
Compared to external ports that were only used to connect devices such as modems, printers and scanners, USB is
powerful in that it connects all types of basic peripheral devices that were each connected via different types. Also,
when a new device is plugged, it is auto-detected without any rebooting or setup process, enabling 127 connections
maximum. Installation is handy since PnP (plug and play) is supported. No extra equipment is needed since most of
the main-board chipsets include the USB controller.
USB cable type supported is type A, which can utilize the USB port of a computer or the USB hub. This product
obtains power from USB, and this makes the product powerful since no external power supply is required.

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Multiport USB Specifications
- Hardware
Number of Ports: 1, 2, 4, 8
USB Interface: USB Specification 1.1/2.0
Serial Interface: RS232 or COMBO(RS422/485)
LED: Tx LED and Rx LED per each port
Serial Connector: DB9 (Male) 1,2,4
DB9 (Male/Female) 4/8 Panel type
Serial Communication Speed: 921.6Kbps maximum
External Power: Optional *1
- Software (Driver)
Supports Windows 7 or above.
Linux Driver *2
Both 32 bit and 64 bit operating systems are supported.
*1: You can connect an external power supply to panel type USB Multiport H/W ver. 1.6 or above.
*2: If you would like to use USB Multiport for Linux, please contact our technical support department.
[email protected]

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About latching USB
All USB Multiport products of SystemBase have latches on USB connection.
Unlike traditional screw-tightening model which require specific cables and connectors, latching USB cable provides
locking function without the need to replace the product.
※ USB latching function may be limited to some manufacturers.
※ For normal mounting, you might hear a ‘click’ sound.
※ To facilitate connection and disconnection, press lightly on the spring button and sweep it.

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Connectivity Method
RS232

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RS422
※ Please check the pinout of your device before connecting
(More example in the next page.)

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※ Please check the pinout of your device before connecting

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RS485

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Termination Resistor
What is a termination resistor?
The purpose of using a termination resistor is to reduce the reflection wave in a network. Our USB to serial devices
use 120 Ω resistor in RS422/RS485 communication when enabled.
Installation
RS422 Mode

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RS485 Mode

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Multi-1/USB Ver4.0
Multi-1/USB Ver4.0 is a model that supports USB1.1 and USB 2.0. It is detected automatically when it is connected
to a USB port with a computer using Linux or Windows. It supports maximum communication speed of 921.6Kbps.
Furthermore, it is equipped with surge protector to protect internal systems from outer shock.
For Combo model, user can set and/or enable communication mode and terminal resistor.
Also, the LEDs are attached outside to show the current status of communication.
- Specification
Communication Speed
Maximum 921.6Kbps
Bus Interface
USB 2.0 (Full Speed)
Cable
Latching Connector applied, 0.6m(1.96ft)
Signal
RS232/RS422/RS485
Controller
FTDI 232R
Connector
DB9 Male
Protection
15kV Surge Protector
Supported OS
Windows 7 or above
Linux Kernel 2.6 or above
Manufacturer
SystemBase Co., Ltd

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1. RS232 Model
- DB9 Male Pin Assignment
2. RS422, RS485 Model
- DB9 Male Pin Assignment
- DIP Switch Setting
ON
OFF
1
Signal
RS485
RS422
2
Echo/Non-Echo Select
Echo
Non-Echo
3
RS422 terminal resistor
Enable
Disable
4
RS485 terminal resistor
Enable
Disable

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- Jumper Setting
①Loosen two screws on the bottom case.
②Remove the side caps.
Look at the rear side of case, you can find the small grooved.
③Top cover is slid to the inside of the case.

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10M: Disable slew rate limit feature. Maximum communication speed for this mode is at 921.6Kbps.
250K: Enable slew rate limit feature. Communication speed is limited to under 250Kbps.
The slew rate limit feature allows communication without errors by activating slew-rate driver to reduce reflection
waves and EMI electromagnetic waves. However, communication speed is limited when it is enabled.

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Multi-2/USB Ver4.0
Multi-2/USB Ver4.0 is a model that supports USB2.0. It is detected automatically when it is connected to a USB port
with a computer using Linux or Windows. It supports maximum communication speed of 921.6Kbps.
Furthermore, it is equipped with surge protector to protect internal systems from outer shock.
For Combo model, a user can set and/or enable communication mode and terminal resistor.
Also, the LEDs are attached outside to show the current status of communication.
- Specification
Communication Speed
Maximum 921.6Kbps
Bus Interface
USB 2.0
Cable
Latching Connector applied, 0.6m(1.96ft)
Signal
RS232/RS422/RS485
Controller
FTDI 2232H
Connector
DB9 Male
Protection
15kV Surge Protector
Supported OS
Windows 7 or above
Linux Kernel 2.6 or above
Manufacturer
SystemBase Co., Ltd

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1. RS232 Model
- DB9 Male Pin Assignment
2. RS422, RS485 Model
- DB9 Male Pin Assignment
- DIP Switch Setting
ON
OFF
1
Signal
RS485
RS422
2
Echo/Non-Echo Select
Echo
Non-Echo
3
RS422 terminal resistor
Enable
Disable
4
RS485 terminal resistor
Enable
Disable

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- Jumper Setting
①Loosen four screws on the bottom case.
②Remove the side caps.
Look at the rear side of case, you can find the small grooved.
③Top cover is slid to the inside of the case.