USB Converter
[USB-511] USB to RS-232C Converter Compact HuMANDATA LTD.
[USB-511] USB to RS-232C Converter Compact (Configurable serial settings)
Supports up to 1 Mbps, and custom baud rate
Configurable data length, stop bits, and parity check settings.
Overview
USB-511 is a USB to RS232C converter that isolated with 2500VDC between RS232C and a USB port. It supports High Speed baud rates of up to 1Mbps. The device driver uses the standard CDC (Communication Device Class) driver included in the OS.

Features
- Supports RS232C
- 2500VDC bus isolation
- Baud rate up to 1Mbps
- Supports custom baud rate
- Configurable data length, stop bits, and parity check settings.
(The low-cost version, USB-501, has these settings fixed.) - Auto transmit data control
Built-in USB-serial chip has auto transmit controller and the driver is activated when it transmit the data - Controllable from embedded Linux devices
It operates as a device of the standard CDC-ACM class.
For Linux distributions with embedded CDC-ACM device drivers, you can use them without installing the drivers.
We do not support the use of Linux itself. - No external power supply is required
USB-511 is powered through a USB port (Bus-powered) - Reliable industrial grade design
- ESD and surge protection
- Housing material: Plastic
- DIN rail, magnet, and screw mountable (Attachment is required)
- Includes a USB cable (1.8m)
- Non-use of 10 Restricted substances of RoHS directive
- MADE IN JAPAN
Specification
Item | Description | Remarks |
---|---|---|
Model | USB-511 | |
Input Power | 5VDC Supplied through a USB port (Bus-powered) |
No external power supply required |
Current Consumption | Less than 100 mA | |
I/O Interface | RS-232C | ESD protection ![]() |
Communication Method | Asynchronous Serial Communication |
|
HOST Interface | USB 2.0 compliant Support Full Speed (12 Mbps) |
USB 1.1 compatible ESD protection ![]() |
Baud Rate | 1,200 bps to 1 Mbps | Support custom baud rate |
Data Bits | 7 or 8 bit | |
Stop Bits | 1 or 2 bit | |
Parity | Even, Odd, No-parity, Mark, Space | |
Flow control | RTS/CTS (Fixed) | |
FIFO RX Buffer Size | 384 bytes | |
FIFO TX Buffer Size | 128 bytes | |
Isolation Method | Bus Isolation | |
Isolation Protection | 2500VDC | Designed value |
USB Driver | Virtual COM port driver | |
Support OS | Windows 11/10/8.1/8/7 | |
LED | PWR: USB bus power TX/RX: Transmit/Receive data, Bi-color LED |
TX: green, RX: red |
USB Connector | Standard Type B Female | |
RS232C Connector | D-SUB 9pin Male (#4-40 UNC) | |
Operating Ambient Temperature | -20 to 60℃ (-4 to 140 [°F]) | No condensation permitted |
Operating Ambient Humidity | 30 to 85%RH | |
Storage Ambient Temperature | -20 to 60℃ (-4 to 131 [°F]) | |
Storage Ambient Humidity | 30 to 85%RH | |
Weight | Approx. 50 [g] | Only main body |
Dimensions | 67 x 43.5 x 27 [mm] (2.638" x 1.713" x 1.063") |
Without projections |
* Power saving function (suspend, standby, sleep and others) is not supported
RS232C Connector pinouts

Pin No | Name | Direction | Notes |
---|---|---|---|
1 | NC | - | |
2 | RXD | IN | Receive data |
3 | TXD | OUT | Transmit data |
4 | DTR | OUT | Data terminal ready |
5 | GND | - | Signal ground |
6 | DSR | IN | Data set ready |
7 | RTS | OUT | Request to send |
8 | CTS | IN | Clear to send |
9 | NC | - | |
CASE | FG | - | Connected to GND |
Package Contents
- USB-511
- USB cable 1.8m
Documentation
Price and Optional Accessories
Description | MODEL | Image | List Price (JPY) | Stock Status |
---|---|---|---|---|
USB to RS-232C Converter Compact |
USB-511 | ![]() |
||
Attachment with clamping screw * |
PEN-003 | ![]() |
||
Attachment for 35mm DIN rail * |
PEN-003-DIN | ![]() |
||
Attachment with neodymium magnet * |
PEN-003-MG | ![]() |
||
D-sub 9pin - TB Adapter with FG Terminal |
ACC-045 | ![]() |
* These accessories attach to the product horizontally only.
Ordering
[USB-507] USB to RS485 Converter Compact (MAX 6Mbps) HuMANDATA LTD.
Compact isolated USB RS-485 Converter
Overview
USB-507 is a USB to RS485 converter that can use RS-485 from USB interfaces. This is an insulation type that can be used safely even in the FA environment.

Features
- Supports RS485 (Half Duplex)
- 2000VDC bus isolation
USB side and RS-485 side are isolated - Baud rate up to 6 Mbps
- Supports custom baud rate
- Auto transmit data control
Built-in USB-serial chip has auto transmit controller and the driver is activated when it transmit the data - Built-in fail-safe bias resisters
- Termination resistance setting switch
- Pluggable the screw terminal
- No external power supply is required
USB-507 is powered through a USB port (Bus-powered) - Reliable industrial grade design
- ESD and surge protection
CE-certified USB-003 is also available - Housing material: Plastic
- DIN rail, magnet, and screw mountable (Attachment is required)
- Includes a USB cable (1.8m)
- Non-use of 10 Restricted substances of RoHS directive
- MADE IN JAPAN
![]() |
Reference dataUSB Compliance testEye pattern of upstream tests ![]() |
Specification
Item | Description | Remarks |
---|---|---|
Model | USB-507 | |
Input Power | 5VDC Supplied through a USB port (Bus-powered) |
No external power supply required |
Current Consumption | Less than 250 mA | |
I/O Interface | RS485 (2-wire) | ESD protection ![]() |
HOST Interface | USB 2.0 compliant Support High/Full Speed |
USB 1.1 compatible ESD protection |
Baud Rate | 300 bps to 6 Mbps | 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 | 1024 bytes | |
FIFO TX Buffer Size | 1024 bytes | |
Isolation Method | Bus Isolation | |
Isolation Protection | 2000VDC | Designed value |
Processor | FT232H | FTDI |
USB Driver | Virtual COM port driver | |
Support OS | Windows 11/10/8.1/8/7 | |
LED | PWR: USB bus power RX: Receive data TX: Transmit data |
|
USB Connector | USB2.0 Type-B Female | |
RS485 Connector | Pluggable the screw terminal 5pin (PHOENIX CONTACT) | 3.5mm pitch |
Operating Ambient Temperature | -20 to 60℃ (-4 to 140 [°F]) | No condensation permitted |
Operating Ambient Humidity | 10 to 90%RH | No condensation permitted |
Storage Ambient Temperature | -20 to 60℃ (-4 to 140 [°F]) | No condensation permitted |
Storage Ambient Humidity | 10 to 90%RH | No condensation permitted |
Weight | Approx. 70 [g] | Only main body |
Dimensions | 67 x 43.5 x 27 [mm] (2.638" x 1.713" x 1.063") |
Without projections |
* Power saving function (suspend, standby, sleep and others) is not supported
RS485 Connector pinouts
Terminal block can be plugged and unplugged while tired. But do not connect or disconnect the terminal block while the power is on. Ground connection is recommended.
Signal | Signal and Polarity | |
---|---|---|
![]() |
B | SD/RD - |
A | SD/RD + | |
GND | Signal ground | |
B | SD/RD - | |
A | SD/RD + |
Package Contents
- USB-507
- USB cable 1.8m
- Driver & Application CD
Documentation
Price and Optional Accessories
Description | MODEL | Image | List Price (JPY) | Stock Status |
---|---|---|---|---|
USB to RS485 Converter Compact |
USB-507 | ![]() |
||
Attachment with clamping screw |
PEN-003 | ![]() |
||
Attachment for 35mm DIN rail |
PEN-003-DIN | ![]() |
||
Attachment with neodymium magnet |
PEN-003-MG | ![]() |
||
Detachable 5P Terminal Connector 1840395 (Phoenix) (Additional purchase) |
TB35-USB-5 | ![]() |
Ordering
[USB-508] USB to RS485/422 Converter Compact HuMANDATA LTD.
Compact isolated USB RS-485/422 Converter
Overview
USB-508 is a USB to RS485/422 converter that can use RS-485/422 from USB interfaces. This is an insulation type that can be used safely even in the FA environment.

Features
- Supports RS-485/422 (Full-duplex)
- 2000VDC bus isolation
USB side and RS-485/422 side are isolated - Baud rate up to 12 Mbps
- Supports custom baud rate
- Auto transmit data control
Built-in USB-serial chip has auto transmit controller and the driver is activated when it transmit the data - Built-in fail-safe bias resisters
- Termination resistance setting switch
- Pluggable the screw terminal
- No external power supply is required
USB-508 is powered through a USB port (Bus-powered) - Reliable industrial grade design
- ESD and surge protection
CE-certified USB-003 is also available - Housing material: Plastic
- DIN rail, magnet, and screw mountable (Attachment is required)
- Includes a USB cable (1.8m)
- Non-use of 10 Restricted substances of RoHS directive
- MADE IN JAPAN
![]() |
Reference dataUSB Compliance testEye pattern of upstream tests ![]() |
Specification
Item | Description | Remarks |
---|---|---|
Model | USB-508 | |
Input Power | 5VDC Supplied through a USB port (Bus-powered) |
No external power supply required |
Current Consumption | Less than 250 mA | |
I/O Interface | RS-485/422 (4-wire) | ESD protection ![]() |
HOST Interface | USB 2.0 compliant Support High/Full Speed |
USB 1.1 compatible ESD protection |
Baud Rate | 300 bps to 6M/8M/12M bps | 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 | 1024 bytes | |
FIFO TX Buffer Size | 1024 bytes | |
Isolation Method | Bus Isolation | |
Isolation Protection | 2000VDC | Designed value |
Processor | FT232H | FTDI |
USB Driver | Virtual COM port driver | |
Support OS | Windows 11/10/8.1/8/7 | |
LED | PW: USB bus power TX/RX: Transmit/Receive data (Bi-Color LED) |
TX: GREEN RX: RED |
USB Connector | USB2.0 Type-B Female | |
RS-485/422 Connector | 5pin Detachable screw terminal | PHOENIX CONTACT 3.5mm pitch |
Operating Ambient Temperature | -20 to 60℃ (-4 to 140 [°F]) | No condensation permitted |
Operating Ambient Humidity | 10 to 90%RH | |
Storage Ambient Temperature | -20 to 60℃ (-4 to 140 [°F]) | |
Storage Ambient Humidity | 10 to 90%RH | |
Weight | Approx. 70 [g] | Only main body |
Dimensions | 67 x 43.5 x 27 [mm] (2.638" x 1.713" x 1.063") |
Without projections |
* Power saving function (suspend, standby, sleep and others) is not supported
RS485/422 Connector pinouts
Terminal block can be plugged and unplugged while tired. But do not connect or disconnect the terminal block while the power is on. Ground connection is recommended.
Signal | Signal and Polarity | |
---|---|---|
![]() |
Z | SD - |
Y | SD + | |
GND | Signal ground | |
B | RD - | |
A | RD + |
Package Contents
- USB-508
- USB cable 1.8m
- Driver & Application CD
Documentation
Price and Optional Accessories
Description | MODEL | Image | List Price (JPY) | Stock Status |
---|---|---|---|---|
USB to RS485/422 Converter Compact |
USB-508 | ![]() |
||
Attachment with clamping screw |
PEN-003 | ![]() |
||
Attachment for 35mm DIN rail |
PEN-003-DIN | ![]() |
||
Attachment with neodymium magnet |
PEN-003-MG | ![]() |
||
Detachable 5P Terminal Connector 1840395 (Phoenix) (Additional purchase) |
TB35-USB-5 | ![]() |
Ordering
[USB-503-RJ45] USB to RS485 Converter (RJ45 type) HuMANDATA LTD.
[USB-503-RJ45] USB to RS485 Converter (RJ45 type)
Compact isolated USB RS-485 Converter
Available LAN cable
Overview
USB-503-RJ45 is a converter that converts from USB to RS485. It is an isolated type that can be used safely even for use in the factory environment.
It is a general specification and can be used for a wide range of applications.
RS485 is equipped with RJ45 connectors used for LANs, and commercially available LAN cable can be used as communication cables, so the work of wiring steps can be reduced.

Features
- Supports RS485 (Half Duplex)
-
2000VDC bus isolation
USB side and RS-485 side are isolated -
Baud rate up to 250Kbps
High-speed type USB-010 (MAX 12Mbps) is also available - Supports custom baud rate
-
Auto transmit data control
Built-in USB-serial chip has auto transmit controller and the driver is activated when it transmit the data - Built-in fail-safe bias resisters
- Termination resistance setting switch
- RJ45 connector
-
No external power supply is required
USB-503-RJ45 is powered through a USB port (Bus-powered) - Reliable industrial grade design
-
ESD and surge protection
CE-certified USB-003 is also available - Housing material: Plastic
- DIN rail, magnet, and screw mountable (Attachment is required)
- Includes a USB cable (1.8m)
- Non-use of 10 Restricted substances of RoHS directive
- MADE IN JAPAN
Specification
Item | Description | Remarks |
---|---|---|
Model | USB-503-RJ45 | |
Input Power |
5VDC Supplied through a USB port (Bus-powered) |
No external power supply required |
Current Consumption | Less than 80 mA | |
I/O Interface | RS485 |
ESD protection ![]() |
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 | |
Support 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 | RJ45 connector | Available LAN cable |
Operating Ambient Temperature | -10 to 60℃ (14 to 140 [°F]) | No condensation permitted |
Operating Ambient Humidity | 10 to 85%RH | No condensation permitted |
Storage Ambient Temperature | -20 to 55℃ (-4 to 131 [°F]) | No condensation permitted |
Storage Ambient Humidity | 10 to 85%RH | No condensation permitted |
Weight | Approx. 70 [g] | Only main body |
Dimensions |
67 x 43.5 x 27 [mm] (2.638" x 1.713" x 1.063") |
Without projections |
* Power saving function (suspend, standby, sleep and others) is not supported
RJ45 pinouts
Pin No | Name | Notes | |
---|---|---|---|
![]() |
1 | B | Transmit/Receive data + |
2 | A | Transmit/Receive data - | |
3 | GND | Signal ground | |
4 | GND | Signal ground | |
5 | GND | Signal ground | |
6 | GND | Signal ground | |
7 | GND | Signal ground | |
8 | GND | Signal ground |
LAN Twisted Pair Cable Color Codes
- 1-2 are a twisted pair
- Make sure to use 8-core cable
- The color codes might be different in the straight and cross cable
Package Contents
- USB-503-RJ45
- USB cable 1.8m
- Driver & Application CD
Documentation
Price and Optional Accessories
Description | MODEL | Image | List Price (JPY) | Stock Status |
---|---|---|---|---|
USB to RS485 Converter (RJ45 type) |
USB-503-RJ45 |
![]() |
||
Attachment with clamping screw |
PEN-003 |
![]() |
||
Attachment for 35mm DIN rail |
PEN-003-DIN |
![]() |
||
Attachment with neodymium magnet |
PEN-003-MG |
![]() |
Ordering
[USB-305] USB RS485/422 Converter (Heavy-duty type) HuMANDATA LTD.
[USB-305] USB RS485/422 Converter (Heavy-duty type)
USB RS485/422 Converter 避雷素子を実装
D-Sun9ピンと端子台の両対応
Overview
USB-305は、USBからRS485またはRS422インタフェースを利用するための変換器です。ノイズに強い絶縁タイプで避雷素子(アレスタ)を内蔵しています。着脱式端子台とD-Sub9ピンコネクタを採用しており、どちらでもご使用いただけます。設定SWによりUSB側のシグナルグランド(SG)とフレームグランド(FG)の分離を行うことができます。
Upcoming Product

Features
-
Supports RS-485/RS422
2-wire or 4-wire of RS-485/RS422 selectable by the dip-switch - 2000VDC bus isolation
- Built-in arrestors for lightning protection
-
Baud rate up to 250Kbps
絶縁型ながら最大250kbpsと高速です - Supports custom baud rate
-
Auto transmit data control
Built-in USB-serial chip has auto transmit controller and the driver is activated when it transmit the data - Built-in fail-safe bias resisters
- Built-in 120 ohm terminal resistor selectable by the dip-switch??
-
Pluggable the screw terminal and D-Sub 9-pin connector
端子台は配線をしたまま取り外しできます -
No external power supply is required
USB-305 is powered through a USB port (Bus-powered) - Reliable industrial grade design
- ESD and surge protection
- Housing material: Plastic
- DIN rail and screw mountable (Attachment is required)
- Includes a USB cable (1.8m)
- Non-use of 10 Restricted substances of RoHS directive
- MADE IN JAPAN
Specification
Item | Description | Remarks |
---|---|---|
Model | USB-305 | |
Input Power |
DC 5V / Less than 200mA Supplied through a USB port (Bus-powered) |
No external power supply required |
I/O Interface | RS-485/422 (2-wire or 4-wire) |
ESD protection ![]() |
HOST Interface | USB 2.0 compliant (Support Hi Speed) |
USB 1.1 compatible ESD protection ![]() |
USB Connector | USB B type (Female) | |
Isolation Method | Bus Isolation | |
Isolation Protection | Over 2000VDC | Designed value |
Processor | FT2232H | FTDI |
USB Driver | Virtual COM port driver | |
Baud Rate | 300bps to 250 Kbps | Support custom baud rate |
Data Bits | 7 or 8 bit | |
Stop Bits | 1 or 2 bit | |
Parity | Even, Odd or No-parity | |
FIFO RX Buffer Size | 1024 Bytes | |
FIFO TX Buffer Size | 1024 Bytes | |
LED |
POW: Power LED RX: Receive data LED TX: Transmit data LED |
|
RS485/RS422 Connector (CN1) | Detachable the screw terminal 5pin (PHOENIX CONTACT) | 3.5mm pitch |
***Connector (CN2) | D-SUB 9pin Male (#4-40 UNC) | Exchangeable to attached optional M2.6 screws |
避雷素子(アレスタ) |
・直流放電開始電圧100V/s(±20%):90V ・インパルス放電開始電圧1kV/μs:550V ・交流電流耐量AC50Hz(10回):10Arms ・インパルス電流耐量8/20μs:10kA ・インパルス寿命10/1000μs(300回):200A |
|
Support OS | Windows 10/8.1/8/7/Vista/XP | |
Operating Ambient Temperature | -20 to 60℃ (-4 to 140 [°F]) | No condensation permitted |
Operating Ambient Humidity | 30 to 85%RH | No condensation permitted |
Storage Ambient Temperature | -20 to 60℃ (-4 to 140 [°F]) | No condensation permitted |
Storage Ambient Humidity | 30 to 85%RH | No condensation permitted |
Weight | Approx. 120 [g] | Only main body |
Dimensions |
69 x 82.5 x 30 [mm] (2.638" x 3.248" x 1.181") |
Without projections |
* Power saving function (suspend, standby, sleep and others) is not supported
Interface Termianl (RS-485/RS422 PIN ASSIGNMENT)

Pin No | Signal | Direction | Notes |
---|---|---|---|
1 | A (RD+) | IN | Receive data + |
2 | B (RD-) | IN | Receive data - |
3 | GND | - | Signal ground |
4 | Y (SD+) | OUT | Transmit data + |
5 | Z (SD-) | OUT | Transmit data - |

Pin No | Name | Direction | Notes |
---|---|---|---|
1 | RD+ | IN | Receive data + |
2 | RD- | IN | Receive data - |
3 | SD+ | OUT | Transmit data + |
4 | SD- | OUT | Transmit data - |
5 | GND | - | Signal ground |
6 | (GND) | - | (Signal ground) |
7 | (GND) | - | (Signal ground) |
8 | (GND) | - | (Signal ground) |
9 | (GND) | - | (Signal ground) |
CASE | FG2 | - |
Frame Ground (Connected to GND) |
D-sub 9 pin male connector
#4-40 UNC screws are mounted by factory setting. You can change them to attached M2.6 screws.
Package Contents
- USB-305
- USB A-B cable 1.8m
- Driver & Application CD
Documentation
Price and Optional Accessories
Description | MODEL | Image | List Price (JPY) | Stock Status |
---|---|---|---|---|
USB RS485/422 Converter (Heavy-duty type) | USB-305 |
![]() |
||
Attachment with clamping screw |
PEN-003 |
![]() |
||
Attachment for 35mm DIN rail |
PEN-003-DIN |
![]() |
||
Attachment with neodymium magnet |
PEN-003-MG |
![]() |
||
Detachable 5P Terminal Connector 1840395 (Phoenix) (Additional purchase) |
TB35-USB-5 |
|