Single Port RS-232 USB to Serial Adapter w/ Optical Isolation & Surge Protection

RS-232 | 512 Bytes Receive | 512 Bytes Transmit

  • Superior Build Quality: Housed in a rugged steel chassis with built in mountable flanges, the serial adapter hub is perfect for installations in labs, warehouses, or heavy machinery.
  • Safe Industrial Connections: Designed for use with Bar Code Scanners, Time Clocks, Label Printers, Point of Sale Terminals, Receipt Printers, and more the USB to Serial Adapter offers optically isolated 15kV surge protection for connected devices.
  • Expand Your Serial Capabilities: Connect a legacy 9-pin serial device through a USB-A port to add legacy functionality to newer technologies with no serial port connections.
  • COM Retention: COM Ports are fully configurable, and after reboots, port assignments are preserved.
  • USB Power: Power is drawn from a USB connection, no bulky power supply or power outlet is required.
  • Upstream: 1 USB port, Type B Female Connector
  • Downstream: 1 Male DB9, w/ nuts
  • LEDs: Power, TX / RX

$109.95

(1 customer review)

In stock

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Units Price
1 - 4 $109.95
5 - 11 $106.65
12 - 24 $104.45
25 - 49 $102.25
50+ $98.96

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Model No. USBG-COM-SI-M

Description

Introduction:

The USBG-COM-SI-M USB Single Port RS-232 serial adapter is designed for industrial applications to allow for easy serial port expansion on your system. In connecting the Single Port RS-232 serial adapter to a USB port on your computer or USB hub, it instantly adds an RS-232 serial communication port to your system. This adapter offers protection for your connected serial device with Optical Isolation and Surge Protection circuitry.

USB-COM-SI-M USB to RS232 Adapter DB9 Port

By taking advantage of the system USB bus, the USB to Single Port RS-232 Serial Adapter makes it easier to add serial ports and serial devices to your system with Plug-and-Play utility and hot plug features. Plugging the USB Serial Adapter into the USB port, the adapter is automatically detected and installed. There are no IRQ & COM port conflicts or configuration issues because no additional IRQ, DMA, or memory is used as resources on the system. The adapter is powered by the USB port, and no external power adapter is required.

Features:

Hardware Specifications:
  • 2000V DC optical isolation
  • 25KV ESD surge protection
  • Industrial metal housing with DIN rail bracket
  • Full RS-232 modem control signals and hardware/software flow control
  • Data Signals Supported:
  • RS-232 data signals: TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND
  • Baud Rate from 300bps up to 921.6Kbps supported
  • 512 byte transmit FIFO & 512 byte receive FIFO
  • Transmit(TxD) and Receive(RxD) LEDS on unit for visual reference
  • Universal Serial Bus(USB) port offers easy plug and Play Operation
  • Item Dimensions: 2.83(L) x 2.29(W)(3.20in with ears) x .895in(H)
OS Support:
  • Windows 7, Windows 8, 8.1, and Windows 10
  • Linux and Mac OS 10.X

Package Contents:

  • Driver CD
  • USBG-COM-SI-M
  • 3ft USB A to B Cable

*Surface Mounting screws not included.

Specifications

Product Specifications

Power
External Power Required

No

Compliance
Country of Origin

Taiwan

Certifications

,

Compliance

TAA

Mechanical
Color

Black

Item Dimensions (L × W × H)

3.23 × 2.99 × 0.91 in.

Item Weight

0.3 lbs.

Mounting Style

Surface Mount

Ports

1 Serial Port

Material of Construction

Steel

USB
USB Type

USB 2.0

Upstream USB Ports

1 Type-B Female USB

Isolated/Surge Protected

Yes

Screw Lock Compatible

Yes

Serial Attributes
RS Signals

TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND

Serial Standards

RS232

Baud Rate

921.6K bps

FIFO Receive

512 bytes

FIFO Transmit

512 bytes

Data Bits

5, 6, 7, 8

Parity

None, Even, Odd, Mark, Space

Stop Bits

1, 1.5, 2

Flow Control

Hardware (RTS, CTS), XON/XOFF

Software
OS Support

Win 11, Linux, Mac OSX, Win 10, Win 7, Win 8

Environmental
Operating Temperature

0°C to 55°C (32°F to 131°F)

Storage Temperature

-20 to 75°C (-4 to 167°F)

Humidity

5% ~ 95% (non-condensing)

Product Information
Warranty

1 year from date of purchase

Hardware
Chipset

FTDI

LED Indicators

Power, TX / RX

Performance
ESD Protection

15KV Surge Protection

Isolated/Surge Protected

Yes

Other Data
Connector

DB9 Male w/ Nuts

Chip Model

FT231XQ-R, ZT213LFEA

Weight

.6 lbs

Dimensions

4 × 5 × 2.25 in

UPC: 729440690731
Pin-Out

DB9 RS-232 Pin-Outs

DB9 RS-232 Pin-Out Diagram
DB9 RS-232 Pin-Out Chart
Accessories & Replacement Parts

Accessories & Replacement Parts

The 4 port USB 2.0 USB Hub has certain accessories that work with it. These hub accessories are what you can order if needed for this hub.

USB 2.0 Cable for close connections Use this USB 2.0 cable to connect your desktop or laptop using a USB hub, printer, or scanner. Transfer…

Model# USB2-AB

$2.95$10.95

In stock

Select options

RS232 Male to Female Serial Data Cable Complete your serial data connection with this 5ft. RS232 DB-9 Male to Female data cable for fast reliable…

Model# 9DBMF5FT

$2.95

In stock

Add to cart

Support

Product Documentation & Drivers


Need drawings, CAD files, or other compliance documentation? Click HERE

Serial F.A.Q.

Product F.A.Q.

View frequently asked product questions below. For all serial troubleshooting, visit this page.
Still need help? Reach out!

  • How do I clean and reinstall my FTDI drivers?
      1. Download the CDM Uninstaller HERE.
      2. Extract the zip file, or open the “CDMuninstallerGUI.exe” utility.
      3. Leave the ‘Vendor ID’ set to 0403 and ‘Product ID’ set to 6001.
      4. Click Add.
      5. Click Remove Devices.
      6. Download the corresponding driver for your operating system and follow on-screen prompts. Windows Driver | MacOS Driver

    Video tutorial here.

  • How can I change my device’s COM port?
      1. Click on Start and navigate to the Control Panel
      2. Locate and click on Device Manager
      3. Under “Ports (COM & LPT)” you will find your serial device titled “USB Serial Port” along with its current COM Port.
      4. Right click on “USB Serial Port” and click on Properties.
      5. Navigate to the “Port Settings” tab and click on “Advanced…”
      6. Once there, the “COM Port Number:” can be changed with a dropdown menu to select the port number.
      7. Click your desired port number (i.e. COM2) and click “OK”.
      8. Click “OK” once more.
      9. Your serial device is now assigned to your chosen COM Port.

     

  • How do I check to ensure the COM port is listed properly in Windows?
    To ensure your serial device is installed properly, complete the following:

    1. Press Windows Key + R to open the Device Manager. Once Run comes up, type “devmgmt.msc” into the text field and press Enter.
    2. Expand the section labeled, Ports (COM & LPT).
    3. You should now see a COM number in brackets to the right of each port. If the device is installed properly, no exclamation points or question marks should be present next to the device.
  • I have everything hooked up, but nothing is functioning correctly.
    To rule out potential issues, quickly test your individual components to ensure that they are working correctly individually, and are not the source of the problem:

    • Serial cables
    • Serial ports
    • Serial devices

    Test your components by:

    • Hook up the serial cable(s), serial port(s), and serial device(s) in a different setup to see if the issue stems from a particular component, or the setup as a whole.
    • Replace the serial cable, port, or device within your setup to further troubleshoot the issue’s origin.

    When testing cables:

    • Test each cable individually.
    • Use short cables when you are testing.

    When testing serial ports and devices:

    • Press the Windows key + R, in Run, type devmgmt.msc, and press Enter to open the Device Manager. You can then check to see if your device is listed under Ports (COM & LPT).
    • Ensure that the COM port number is the correct number for the serial device and that the software being used to connect the computer to the serial device uses the correct COM port number.
    • If the device is listed with an error, follow the instructions on the website to reinstall the drivers.
  • Serial communication is not functioning correctly, how can I tell if the problem caused by the adapter or my serial software application?
    Older serial communication applications make use of legacy hardware addresses, often incompatible with PCI, PCIe, and USB to Serial products. Contact the software provider to troubleshoot.
  • I am receiving an error when I try to install the drivers in Windows 8 64 bit.
    Driver Signature Enforcement in Windows 8 may need to be disabled in order to use various drivers. After disabling this feature, the driver will be allowed to install.

    Note: You are required to restart your computer after disabling the Driver Signature Enforcement. Save all open work on your computer.

    Disable driver signature enforcement:

    1. Press the Windows key + C.
    2. Click Settings > Change PC Settings.
    3. In the left pane, click General.
    4. In the right pane, under Advanced startup, click Restart now.

    When your system restarts:

    1. Click Troubleshoot > Advanced options > Startup Settings > Restart.
    2. Press 7.

    When your computer restarts, Driver Signature Enforcement will be disabled and you can install the drivers.

  • I am receiving an error when I try to install the drivers in Windows 10 64 bit.
    Driver Signature Enforcement in Windows 10 may need to be disabled in order to use various drivers. After disabling this feature, the driver will be allowed to install.

    Note: You are required to restart your computer after disabling the Driver Signature Enforcement. Save all open work on your computer.

    Disable Driver Signature Enforcement:

    1. Click the Windows icon in the taskbar.
    2. Click Power.
    3. Press and hold the Shift key and click Restart.

    After your computer restarts:

    1. Click Troubleshoot Advanced Options Startup Settings Restart.
    2. Press 7.

    When your computer restarts, Driver Signature Enforcement will be disabled and you can install the drivers.

  • Why did the software not install properly in macOS High Sierra (10.13) or later?
    High Sierra 10.13 and later versions of macOS enforce strict security policy revisions. In order for the device to operate, software packages like those used in this installation must be allowed in macOS Security and Privacy settings once the software is installed.

    Once the driver/software is installed, follow these steps to allow the software:

    1. Open System Preferences.
    2. Open Security & Privacy.
    3. Click the Allow button near the bottom of the General tab.
Reviews (1)

1 review for Single Port RS-232 USB to Serial Adapter w/ Optical Isolation & Surge Protection

  1. Lou

    I have been purchasing this product for over 4 years and have never had a problem. Thank you!!

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