Humandata USB-304 User manual

HuMANDATA LTD.
2 Channel
USB to RS485/422 Converter
USB-304
User’s Manual
Ver. 1.0

USB-304 (Ver.1.0)
Table of Contents
Precautions ..................................................................................................... 1
Revision History.............................................................................................. 2
Introduction .................................................................................................... 2
1. Overview............................................................................................................ 2
1.1. Power Supply........................................................................................................4
1.2. Block Diagram......................................................................................................4
2. Specifications ..................................................................................................... 5
2.1. Optional Accessories ............................................................................................6
2.2. RS-485/422(4 wire) Mode.....................................................................................7
2.3. RS-485(2 wire) Mode............................................................................................7
3. Interface Terminal.............................................................................................. 8
4. Setting Switch.................................................................................................... 9
4.1. RS-485/422(4 wire)...............................................................................................9
4.2. RS-485(2 wire)................................................................................................... 10
4.3. Setting Switch (SWA2/SWB2) Function.......................................................... 10
5. Additional Documentation and User Support ................................................... 11
6. Warranty and Compensation............................................................................ 11

1
USB-304 (Ver.1.0)
Precautions
1
This product uses ordinary off-the-shelf electronic components, and
is therefore inappropriate for use in applications that require special
quality or reliability and are expected to protect human lives or
prevent accidents, such as safety mechanisms in fields including
space, aeronautics, medicine, and nuclear power.
2
Do not be used underwater or in high-humidity environments.
3
Do not be used in the presence of corrosive gases, combustible gases,
or other flammable gases.
4
Do not turn on power when circuit board surface is in contact with
other metal.
5
Do not apply voltage higher than rated voltage.
6
This manual may be revised in the future without notice owing to
improvements.
7
All efforts have been made to produce the best manual possible, but
if users notice an error or other problem, we ask that they notify us.
8
Item 7 notwithstanding, HuMANDATA cannot be held liable for the
consequences arising from use of this product.
9
HuMANDATA cannot be held liable for consequences arising from
using this product in a way different from the uses described herein,
or from uses not shown herein.
10
This manual, circuit diagrams, sample circuits, and other content
may not be copied, reproduced, or distributed without permission.
11
If the product emits smoke, catches fire, or becomes unusually hot,
cut the power immediately.
12
Do not install the control cables or communication cables together
with the main circuit lines or power cables. In such an environment,
it may result in malfunction due to noise.
13
Be careful of static electricity.
Do Not
Attention

2
USB-304 (Ver.1.0)
Revision History
Date
Revision
Description
Nov. 17, 2017
v1.0
Initial release
Introduction
Thank you very much for purchasing our product of USB-304.
USB-304 is a 2 channel USB to RS485/RS422 converter that isolated between each
RS-485/422 serial port and a USB port. You can use 2 channels of RS-485/422 serial
port from a USB port. Those 2 channels are isolated independently from USB side.
1. Overview
TOP side (Block diagram)

3
USB-304 (Ver.1.0)
Front Side (USB)
Rear Side (RS-485/422)
Setting Switch x2
Terminal Block x2
Power LED
USB
Connector
Setting Switch x2
Receive/Transmit
Data LED x2

4
USB-304 (Ver.1.0)
1.1. Power Supply
USB-304 is powered through a USB port (Bus-powered). No external power supply
is required.
1.2. Block Diagram
Between USB and each RS-485/422 serial port are isolated.

5
USB-304 (Ver.1.0)
2. Specifications
Item
Description
Remarks
Model
USB-304
Power
5VDC
Supplied through a USB
port(Bus-powered)
No external power
supply required
Current Consumption
Less than 200 mA
Number of RS-485/422 Port
2
I/O Interface
RS-485/422
(2-wire or 4-wire) ESD protection ±15KV
HOST interface
USB 2.0 Compliant
(Support HiSpeed)
USB 1.1 compatible
ESD protection ±11KV
USB connector
Standard Type B Female
Isolation Method
Bus isolation
Isolation Protection
Over 2000VDC
Designed value
Processor
FT2232H FTDI
USB Driver
Virtual COM port driver
Baud Rate
300bps to 6M/8M/12Mbps Support custom baud
rate
Data Bits
7 or 8 bit
Stop Bits
1 or 2 bit
Parity
Even, Odd, No-parity
FIFO RX Buffer Size
4096 bytes/Ch
FIFO TX Buffer Size
4096 bytes/Ch
LED
POW: USB bus power
RX: Receive data x2
TX: Transmit data x2
RS-485/422 Connector
5pin detachable screw terminal
(PHOENIX CONTACT) 3.5mm pitch
Supports OS
Windows 10/8.1/8/7/Vista/XP
Operating Ambient
Temperature
-20 to 60 °C (-4 to 140 °F) No condensation
permitted
Operating Ambient Humidity
30 to 85%RH

6
USB-304 (Ver.1.0)
Storage Ambient
Temperature
-20 to +60 °C (-4 to 140 °F) No condensation permitted
Storage Ambient Humidity
30 to 85%RH
Weight
Approx. 100 [g] Only main body
Dimensions
69 x 82.5 x 30 [mm]
(2.638" x 3.248" x 1.181") Without projections
* There is a case to be changed to the parts of the compatibility
* Power saving function (suspend, standby, sleep and others) is not supported
2.1. Optional Accessories
Model Name
Image
Description
PEN-003
USB series Attachment with clamping screw
JAN：4937920800709
PEN-003-DIN
USB series Attachment for 35mm DIN rail
JAN：4937920800716
PEN-003-MG
USB series Attachment with neodymium magnet
JAN：4937920801201
TB35-USB-5
Detachable 5P(3.5mm pitch)Terminal Connector :
1840395 (Phoenix)
JAN：4937920801287

7
USB-304 (Ver.1.0)
2.2. RS-485/422(4 wire) Mode
Item
Specification
Remarks
Comm. Method
Full-duplex transmission
Baud Rate
300bps to 6M/8M/12Mbps Custom baud rate is
supported *
Number of Connectable
Terminals
128 Typical example
Terminal Resistor
120 ΩConfigurable by setting switch
(SWA1/SWB1) ON/OFF
Transmit Enable
Control
Automatically controlled
by USB controller
Receive Enable Control
Available by setting switch
(SWA2/SWB2)
RS-485 or RS-422 mode can communicate with multiple terminals by using two twist
pair cables. Wires of upstream and downstream are separated and simultaneous
communication (full-duplex transmission) is available.
* When baud rates are more than 6Mbps, only 8 Mbps or 12 Mbps are supported.
2.3. RS-485(2 wire) Mode
Item
Specification
Remarks
Comm. Method
Half-duplex transmission
Baud Rate
300bps to 6Mbps Custom baud rate is supported
Number of Connectable
Terminals
128 Typical example
Terminal Resistor
120 ΩConfigurable by setting switch
(SWA1/SWB1) ON/OFF
Transmit-Receive
Switching
Automatically controlled
by USB controller
Echo Cancellation
Available by setting switch
(SWA2/SWB2)
RS-485 mode can communicate with multiple terminals by using a twist pair cable.

8
USB-304 (Ver.1.0)
3. Interface Terminal
Terminal block is pluggable. Do not remove it while the power is supplied.
Channel A Connection
Pin Number
Signal
Signal and Polarity
1
A
RD+
2
B RD-
3
GND
GND
4
Y SD+
5
Z
SD-
The GND(Ground) pin is recommended to be wired.

9
USB-304 (Ver.1.0)
4. Setting Switch
USB-304 can change operating mode by setting, switching echo cancelling and
terminal resistor.
4.1. RS-485/422(4 wire)
SWA2/SWB2
Factory
Setting
1
2
4 wire
OFF
ON
* Please refer to Section 4.3
SWA1/SWB1
1
2
3
4
No termination
OFF
OFF
OFF
OFF
SWA1/SWB1
1
2
3
4
Transmit Side
termination
OFF OFF OFF
ON
SWA1/SWB1
1
2
3
4
Receive Side
termination
ON
OFF OFF OFF
SWA1/SWB1
1
2
3
4
Both Sides
termination
ON
OFF OFF
ON

10
USB-304 (Ver.1.0)
4.2. RS-485(2 wire)

Echo Cancelling Enable (no echo)
SWA2/SWB2
1
2
2 wire
ON
OFF
* Please refer to Section 4.3
SWA1/SWB1
1
2
3
4
No termination
OFF
ON
ON
OFF
SWA1/SWB1
1
2
3
4
Termination
Enable
ON
ON
ON
OFF
Echo Cancelling Disable (echo enable)
SWA2/SWB2
1
2
2 wire
ON
ON
4.3. Setting Switch (SWA2/SWB2) Function
SWA2-1/SWB2-1
DE (Transmit enable) Control
OFF
Always Enable
ON
Enable in Transmission
SWA2-2/SWB2-2
Echo Control
OFF
Echo Cancelling Enable (no echo)
ON
Echo Cancelling Disable (echo enable)

11
USB-304 (Ver.1.0)
5. Additional Documentation and User Support
The following documents and other supports are available at
http://www.hdl.co.jp/en/faspc/USB/usb-304
Device Driver
Outline Drawing
… and more.
6. Warranty and Compensation
Please refer to the following URL for the warranty.
http://www.fa.hdl.co.jp/en/fa-warranty.html

2 Channel
USB to RS485/422 Converter
USB-304
User’s Manual
Ver. 1.0 ........................................... Nov. 17, 2017
HuMANDATA LTD.
Address: 1-2-10-2F, Nakahozumi, Ibaraki
Osaka, Japan
ZIP 567-0034
Tel: [phone] (Japanese)
Fax: [phone] (Japanese/English)
URL: http://www.fa.hdl.co.jp (Japan)
http://www.fa.hdl.co.jp/en(Global)