Multi-4/USB RS232 (DB9F) is a serial communication adapter that makes it easy and fast to add serial communication ports to a system via USB. It supports USB Full-Speed and serial communication speeds up to 921.6Kbps, along with a ±15kV surge protector, delivering compatibility and stability.
The LED indicators for serial communication status complement the clean design while also serving as a useful debugging aid.
Multi-4/USB RS232 (DB9F) is used across a wide range of applications, including R&D, office automation, and factory automation.
Through a jumper setting, Multi-4/USB RS232 (DB9F) can supply +5V externally via pin 9 of its DB9 connector, in place of the RI signal line.
This approach, pioneered by SystemBase, makes it simple to power devices such as barcode readers directly from the adapter.
This removes the need for a separate power adapter, reducing additional cost while providing a cleaner installation and significant maintenance benefits.
| Specifications | USB Specification Rev 2.0, High-Speed |
| Interface | RS232 |
| Number of Ports | 4 |
| Maximum Communication Speed | Up to 921.6Kbps |
| Signal Lines | TXD, RXD, GND, RTS, CTS, DTR, DSR, DCD, RI (+5V available) |
| Data Bits | 7, 8 |
| Stop Bits | 1, 2 |
| Parity | None, Even, Odd |
| Cable Length / Diameter | 1200mm / Φ4.8mm |
| Protection | Self-protected against ±15kV electrical surges |
| Flow Control | RTS/CTS, XON/XOFF |
| Controller | FT4232H |
| Board Connector | DB9 Female |
| Power | USB bus power (when using an adapter: 5V, OD 5.5mm, ID 2.1mm) |
| Operating System | Windows 7 or later Windows Server 2008 or later Linux |
| Utility | TestView |
| Operating Temperature | -20 ~ 70℃ |
| Storage Temperature | -20 ~ 70℃ |
| Humidity | 5–95% non-condensing |
| Certifications | KC |
Click the button below to go to the resource center, where you can download related materials such as manuals, drivers, and utilities.
DownloadMulti-4/USB RS232 (DB9F) is a serial communication adapter that makes it easy and fast to add serial communication ports to a system via USB. It supports USB Full-Speed and serial communication speeds up to 921.6Kbps, along with a ±15kV surge protector, delivering compatibility and stability.
The LED indicators for serial communication status complement the clean design while also serving as a useful debugging aid.
Multi-4/USB RS232 (DB9F) is used across a wide range of applications, including R&D, office automation, and factory automation.
Through a jumper setting, Multi-4/USB RS232 (DB9F) can supply +5V externally via pin 9 of its DB9 connector, in place of the RI signal line.
This approach, pioneered by SystemBase, makes it simple to power devices such as barcode readers directly from the adapter.
This removes the need for a separate power adapter, reducing additional cost while providing a cleaner installation and significant maintenance benefits.
| Specifications | USB Specification Rev 2.0, High-Speed |
| Interface | RS232 |
| Number of Ports | 4 |
| Maximum Communication Speed | Up to 921.6Kbps |
| Signal Lines | TXD, RXD, GND, RTS, CTS, DTR, DSR, DCD, RI (+5V available) |
| Data Bits | 7, 8 |
| Stop Bits | 1, 2 |
| Parity | None, Even, Odd |
| Cable Length / Diameter | 1200mm / Φ4.8mm |
| Protection | Self-protected against ±15kV electrical surges |
| Flow Control | RTS/CTS, XON/XOFF |
| Controller | FT4232H |
| Board Connector | DB9 Female |
| Power | USB bus power (when using an adapter: 5V, OD 5.5mm, ID 2.1mm) |
| Operating System | Windows 7 or later Windows Server 2008 or later Linux |
| Utility | TestView |
| Operating Temperature | -20 ~ 70℃ |
| Storage Temperature | -20 ~ 70℃ |
| Humidity | 5–95% non-condensing |
| Certifications | KC |
Click the button below to go to the resource center, where you can download related materials such as manuals, drivers, and utilities.
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