Gomax HUB-66U User manual

6-Port RS-232/422/485 USB-to-serial
converter
User Manual
rev: 160205
Made in Taiwan
HUB-66U

Safety and Notice
The HUB-66U 6-Port RS-232/422/485 USB-to-serial converter has been tested for conformance
to safety regulations and requirements, and has been certified for international use. However, like all
electronic equipments, the HUB-66U should be used with care. Please read and follow the safety
instructions to protect yourself from possible injury and to minimize the risk of damage to the unit.
●Follow all instructions and warnings marked on this unit.
●Do not attempt to service this unit yourself, except where explained in this manual.
●Provide proper ventilation and air circulation and do not use near water.
●Keep objects that might damage the device and assure that the placement of this unit is on a
stable surface.
●Use only the power adapter and power cords and connection cables designed for this unit.
●Do not use liquid or aerosol cleaners to clean this unit. Always unplug the power to the device
before cleaning.
TABLE OF CONTENTS
INTRODUCTION.................................................................................................................1
FEATURES.........................................................................................................................1
PACKAGE CONTENTS......................................................................................................1
SPECIFICATIONS..............................................................................................................2
PANEL DESCRIPTIONS.....................................................................................................3
HARDWARE INSTALLATION.............................................................................................4
CONNECTION DIAGRAM ..................................................................................................4
RS-232 PIN DEFINTION.....................................................................................................5
DRIVER INSTALLATION....................................................................................................6
OPERATION SOFTWARE................................................................................................10
WARRANTY .....................................................................................................................11

1
INTRODUCTION
The HUB-66U 6-Port RS-232/422/485 USB-to-serial converter provides user to connect 6
RS-232 or RS-232/422/485 devices to the laptop or workstation through the USB port. HUB-66U
is compatible with new and legacy serial devices, and are perfect for mobile, instrumentation,
and point-of-sale applications. With HUB-66U, user can control up to 6 devices with
RS-232/422/485 connector through one USB port on the lap or PC.
FEATURES
Supports Hi-Speed USB 2.0 (up to 480 Mbps)
USB type A connector
256-byte FIFO and on-chip H/W, S/W flow control
Built-in 15 kV ESD protection for all serial ports
Hassle-free COM port retention
Drivers provided for Windows
External power
Locking power jack
PACKAGE CONTENTS
1x HUB-66U
1x 5V power supply unit
1x Installation software CD

2
SPECIFICATIONS
Model Name
HUB-66U
Technical
Role of usage
6 Port USB to Serial Converter
Compliance
USB 1.1/2.0 compliant
Speed
480 Mbps (Hi-Speed USB) and 12 Mbps (Full-Speed USB)
ESD protection
[1] Human body model—±19kV [air-gap discharge] & ±12kV [contact discharge]
[2] Core chipset — ±8kV
PCB stack-up
4-layer board [impedance control — differential 100Ω; single 50Ω
Input
1x USB
Output
6x RS-232
USB connector
USB type A
RS-232 connector
DE-9 [9-pin D-sub female]
Mechanical
Dimensions
[L x W x H]
Model
295 x 93 x 25mm [11.6" x 3.6" x 1"]
Package
371 x 170 x 77mm[1'5" x 6.7" x 3"]
Carton
410 x 368 x 393mm[1'3" x 1'4" x 1'5"]
Weight
Model
588g [20.7 oz]
Package
1018g [2.2 lbs]
Fixedness
Wall-mounting case
Power supply
5V 2A DC
Power consumption
3Watts [max]
Operation temperature
0~40°C [32~104°F]
Storage temperature
-20~60°C [-4~140°F]
Relative humidity
20~90% RH [no condensation]

3
PANEL DESCRIPTIONS
1. Power LED:Power on/off indicator
2. RS-232 TX LED: Port is sending data to connected device
3. RS-232 RX LED: Port is receiving data to connected device
4. +5V DC: Connect to a 5V power supply unit
5. USB: Connect to the USB port of PC
6. RS-232 PORT 1 ~ 6: .Connect to serial port devices with a DSUB-9 female-female or male-female cable
7. LED: FW update indicator. LED will light when dip switch is set to FW update mode
8. DIP SWITCH: FW update mode/ Normal mode

4
HARDWARE INSTALLATION
1. Connect the HUB-66U to your PC
2. Connect your serial device to the HUB-66U
3. Plug in 5V DC power supply unit to the power jack of HUB-66U
CONNECTION DIAGRAM

5
RS-232 PIN DEFINTION
1. DB 9 Male RS-232/422/485 PIN DEFINTION
2. RS-232 CABLE PIN DEFINTION
Connector 1 Connector 2 Function
23Rx Tx
32Tx Rx
55Signal ground
Pin RS-232 RS-422/ 4-wire RS-485 2-wire RS-485
1
DCD
TxD-(A)
--
2
RxD
TxD+(B)
--
3
TxD
RxD+(B)
Data+(B)
4
DTR
RxD-(A)
Data-(A)
5
GND
GND
GND
6
DSR
--
--
7
RTS
--
--
8
CTS
--
--

6
DRIVER INSTALLATION
Step 1.
Use cable (USB to USB) to connect with the computer and Hub-66U. After connection, it will
show 6 unknown virtual COM Port in the device manager.
Step 2.
In the device manager, please click the Virtual COM Port with the right button to update the
device driver software.
Port 1
Port 2
Port 3
Port 4
Port 5
Port 6

7
Step 3.
Browse the driver file on the computer and install it.
Step 4.
When alert window pops out, please select the “Install this driver software anyway”.

8
Step 5.
After finishing the installation, the order of COM port in the device manager is different from the
device (Hub-66U).
Step 6.
Operate the Hub-66U software to test the order of COM port.
(a) Select any COM port (take COM port 7 as an example).
(b) Input some string or number and click the “Send” button.

9
Step 7.
After step 6 finished, LED indicator with corresponding device’s COM port will light on when
transferring data.
Step 8.
You can click the right button of mouse to select the content of virtual COM port to re-arrange the
COM port number.
*Before this step, please remember to close the Hub-66U software. Or it will occupy the COM
port that we cannot change the order.

10
OPERATION SOFTWARE
1. Select COM Port
2. Open the selected COM Port
3. Close the selected COM Port
4. Set the Baud Rate/ Parity/ Databits/ StopBits
5. Set the RS-232 or RS-485 mode to each port
6. Received data information
7. Sent data information
8. Use the file to send or receive data (User has to click “Enable” item to use this function)
1
8
7
6
5
4
3
2

11
WARRANTY
The SELLER warrants the HUB-66U 6-Port RS-232/422/485 USB-to-serial converter to be
free from defects in the material and workmanship for 1 year from the date of purchase from the SELLER
or an authorized dealer. Should this product fail to be in good working order within 1 year warranty period,
The SELLER, at its option, repair or replace the unit, provided that the unit has not been subjected to
accident, disaster, abuse or any unauthorized modifications including static discharge and power surges.
Unit that fails under conditions other than those covered will be repaired at the current price of parts
and labor in effect at the time of repair. Such repairs are warranted for 90 days from the day of reshipment
to the BUYER. If the unit is delivered by mail, customers agree to insure the unit or assume the risk of loss
or damage in transit. Under no circumstances will a unit be accepted without a return authorization
number.
The warranty is in lieu of all other warranties expressed or implied, including without limitations, any
other implied warranty or fitness or merchantability for any particular purpose, all of which are expressly
disclaimed.
Proof of sale may be required in order to claim warranty. Customers outside Taiwan are responsible
for shipping charges to and from the SELLER. Cables are limited to a 30 day warranty and cable must be
free from any markings, scratches, and neatly coiled.
The content of this manual has been carefully checked and is believed to be accurate. However, The
SELLER assumes no responsibility for any inaccuracies that may be contained in this manual. The
SELLER will NOT be liable for direct, indirect, incidental, special, or consequential damages resulting
from any defect or omission in this manual, even if advised of the possibility of such damages. Also, the
technical information contained herein regarding the HUB-66U features and specifications is
subject to change without further notice.