[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.
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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.

User's manual, Outline Drawing, etc






