Humandata USB-503 User manual

HuMANDATA LTD.
USB to RS485 Converter Compact
USB-503
User’s Manual
Ver. 1.0

USB-503 (Ver.1.0)
Table of Contents
Precautions ..................................................................................................... 1
Revision History.............................................................................................. 2
Introduction .................................................................................................... 2
1. Overview............................................................................................................ 3
2. Power Supply ..................................................................................................... 3
2.1. Block Diagram......................................................................................................4
3. Specifications ..................................................................................................... 5
3.1. Optional Accessories ............................................................................................6
3.2. RS-485 (2 wire) Mode...........................................................................................7
4. Device Driver ..................................................................................................... 7
5. RS-485 Terminal Block....................................................................................... 7
6. Setting Switch.................................................................................................... 8
7. Latency Timer .................................................................................................... 8
8. Additional Documentation and User Support ..................................................... 9
9. Warranty and Compensation.............................................................................. 9

1
USB-503 (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-503 (Ver.1.0)
Revision History
Date
Revision
Description
Jul. 27, 2020
v1.0
Initial release
Introduction
Thank you very much for purchasing our product of USB-503.
USB-503 is a USB to RS-485 converter that isolated between RS-485 and a USB
port. So, it’s safe for use in factory automation environment.

3
USB-503 (Ver.1.0)
1. Overview
Front Side (USB)
Rear Side (RS-485)
2. Power Supply
USB-503 is powered through a USB port (Bus-powered). No external power supply
is required.
USB Connector
Terminal Block
Setting Switch
Power LED
Tx Status LED
Rx Status LED

4
USB-503 (Ver.1.0)
2.1. Block Diagram
Between USB and RS-485 are isolated.

5
USB-503 (Ver.1.0)
3. Specifications
Item
Description
Remarks
Model
USB-503
Power
5VDC
Supplied through a USB port
(Bus-powered)
No external power supply
required
Current Consumption
Less than 80 mA
I/O Interface
RS-485 (2-wire) ESD protection ±15KV
HOST interface
USB 2.0 Compliant
(Support Full Speed)
USB 1.1 compatible
ESD protection
Baud Rate
300 bps to 250 Kbps 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
384 bytes
FIFO TX Buffer Size
128 bytes
Isolation Method
Bus isolation
Isolation Protection
2000VDC
Designed value
Processor
FT232BL FTDI
USB Driver
Virtual COM port driver
Supports OS
Windows 10/8.1/8/7
LED
PWR: USB bus power
RX: Receive data
TX: Transmit data
USB connector
Standard Type B Female
RS485 Connector
3pin Detachable screw
terminal PHOENIX CONTACT
Operating Ambient
Temperature
-10 to 60 [°C] (14 to 140 [°F])
No condensation permitted
Operating Ambient Humidity
10 to 85%RH
Storage Ambient
Temperature
-20 to 55 [°C] (-4 to 131 [°F])
Storage Ambient Humidity
10 to 85%RH
Weight
Approx. 70 [g] Only main body

6
USB-503 (Ver.1.0)
Dimensions
67 x 43.5 x 27 [mm]
(2.638" x 1.713" x 1.063") 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
3.1. 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
TB-USB-3
Detachable 3P Terminal Connector: 1757022 (Phoenix)
JAN：4937920801263

7
USB-503 (Ver.1.0)
3.2. RS-485 (2 wire) Mode
Item
Specification
Remarks
Comm. Method
Half-duplex transmission
Baud Rate
300bps to 250 Kbps Custom baud rate is supported
Number of Connectable
Terminals
128 Typical example
Terminal Resistor
120 ΩConfigurable by setting switch
ON/OFF
Transmit-Receive
Switching
Automatically controlled
by USB controller
RS-485 mode can communicate with multiple terminals by using a twist pair cable.
4. Device Driver
When the device is connected to a USB port of PC for the first time, the device
driver is needed to install on the USB port. When there are multiple USB ports, the
driver is needed to install on each port. The device driver and its install manual are
included in the CD bundled with the product. And they are also available on its
product page. Please refer to the Chapter 8. "Additional Documentation and User
Support".
5. RS-485 Terminal Block
Terminal block is pluggable. Do not remove it while the power is supplied.
Please prioritize this pin number more than other data of connector manufacturers.
Pin Number
Signal
Signal and Polarity
1
A SD/RD+
2
B
SD/RD-
3
GND GND

8
USB-503 (Ver.1.0)
6. Setting Switch
The setting of terminal resistor is changeable by the setting switch.
7. Latency Timer
In some cases, adjusting “Latency Timer” will help to speed up the response time of
application. The default value is set by device driver.
If you reduce the value of “Latency Timer”, its priority will be higher. But be careful
that the response time of the other applications will probably be slow.
Following steps of Windows OS show how to set “Latency Timer”.
Open “Device Manager” and right click “[USB-503…]”. Open “Properties” window
and open “Port Setting” tab, then click “Advanced” button.
SW
Terminal Resistor (120Ω)
OFF
Disable
ON
Enable
Factory setting

9
USB-503 (Ver.1.0)
8. Additional Documentation and User Support
The following documents and other supports are available at
https://www.hdl.co.jp/en/faspc/USB/usb-503
Device Driver
Outline Drawing
… and more.
9. Warranty and Compensation
Please refer to the following URL for the warranty.
https://www.fa.hdl.co.jp/en/fa-warranty.html

USB to RS485 Converter
Compact
USB-503
User’s Manual
Ver. 1.0 ............................................ Jul. 27, 2020
HuMANDATA LTD.
Address: 1-2-10-2 F, Nakahozumi, Ibaraki
Osaka, Japan
ZIP 567-0034
Tel: [phone] (Japanese)
Fax: [phone] (Japanese/English)
URL: https://www.fa.hdl.co.jp/en/ (Global)
https://www.fa.hdl.co.jp/jp/ (Japan)