MOXA UPort 1250 USB to Serial Converter
- Model: UPort 1250
MOXA UPort 1250 FEATURES
- 1 x USB 2.0 Port (Type B connector)
- 2 x RS-232/422/485 Serial ports (DB9 male connector)
- 5 VDC input power range
- Metal body design
- Compatible Driver with Windows, Linux, macOS
- 0 to 60°C operating temperature
MOXA UPort 1250 INTRODUCTION
The Moxa UPort 1250 USB to serial converter is designed to
strengthen industrial edge connectivity by enabling perfect communication
between modern USB-based systems and legacy serial devices. As part of the
UPort 1200/1400/1600 Series and positioned within USB-to-serial converters, the
UPort 1250 plays a critical role in industrial modernization. In factory
automation environments, its design allows engineers to connect controllers,
instruments, and field devices that rely on RS-232, RS-422, or RS-485 communication
to industrial PCs and laptops that no longer include native serial ports. The
Moxa UPort 1250 uses a USB 2.0 interface to ensure stable data transmission
while supporting two serial ports with RS-232/422/485 standards, giving you the flexibility to integrate multiple devices at once. Its rugged metal housing and
reliable 0 to 55°C operating temperature range make it suitable for control
cabinets and shop-floor installations where durability matters. For engineers
looking to simplify serial connectivity without compromising reliability, the
UPort 1250 converter offers a practical and proven solution. Further technical
insight is available in the Moxa UPort 1250 datasheet.
You can also find the UPort 1610-8, UPort 1450I, and UPort 1650-8 models in the MOXA UPort 1200/1400/1600.
MOXA UPort 1250 CERTIFICATIONS
From a compliance perspective, the Moxa UPort 1250 converter
is engineered to meet key industrial standards, ensuring dependable operation
in electrically demanding environments. Like all the other products under the
USB-to-Serial Converters/USB Hubs category, it complies with EMC, EMS, and EMI
requirements to maintain signal integrity and system stability, while also
meeting essential safety standards for industrial deployment. These
certifications confirm that the UPort 1250 can be confidently used in automation
systems where regulatory compliance and long-term reliability are required. For
engineers who need deeper technical specifications, certification details, and
installation guidance, additional information can be found in the Moxa UPort 1250 manual.

| USB-to-Serial : USB Interface | |
| Number of Ports | 1 Port |
| USB Connector | USB type B |
| USB Standards | USB 1.1/2.0 compliant |
| Speed | 12 Mbps, 480 Mbps |
| USB-to-Serial : Serial Interface | |
| Total number of serial ports | 2 x RS-232/422/485 Ports |
| Serial connection type | DB9-M with a mini DB9-F converter to the terminal |
| Serial Communication Parameters | Data Bits : 5, 6, 7, 8 and Stop Bits : 1, 1.5, 2 and Parity : None, Even, Odd, Space, Mark |
| Flow Control | RTS/CTS, XON/XOFF, None |
| FIFO | 128bytes |
| Data transfer speed ( Baudrate ) | 50 bps to 921.6 kbps |
| Electrical isolation | No |
| USB-to-Serial : Compatible Operating Systems | |
| Windows Drivers | Windows 11/10/8.1/8/7/Vista/XP/ME/98/95, Windows Server 2022/2019/2016/2012 R2/2012/2008 R2/2008/2003/2000/NT |
| Linux Drivers | Kernel versions: 6.x, 5.x, 4.x, 3.x, 2.6.x and 2.4.x |
| Mac Drivers | macOS versions: 10.12 to 10.15, 11.x |
| USB-to-Serial : Serial Signals | |
| RS-232 | TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND |
| RS-422 | Tx+, Tx-, Rx+, Rx-, GND |
| RS-485-4w | Tx+, Tx-, Rx+, Rx-, GND |
| RS-485-2w | Data+, Data-, GND |
| USB-to-Serial : Power Requirements | |
| Input Voltage | 5 VDC |
| Input Current | 360 mA @ 5 VDC |
| USB-to-Serial : General | |
| MTBF | 563,179 hrs |
| USB-to-Serial : Physical Characteristics | |
| Dimensions | 77 x 26 x 111 mm (3.03 x 1.02 x 4.37 in) |
| Housing | Metal |
| Standards and Certifications | EMC: EN 55032/35; EMI: CISPR 32, FCC Part 15B Class A; EMS: IEC 61000-4-2 ESD: Contact: 4 kV; Air: 8 kV, IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m, IEC 61000-4-4 EFT: Power: 1 kV, IEC 61000-4-5 Surge: Power: 1 kV, IEC 61000-4-6 CS: 150 kHz to 80 MHz: 3 V/m, IEC 61000-4-8 PFMF; Safety: UL 60950-1; Green Product: RoHS, CRoHS, WEEE; Telcordia (Bellcore) Standard |
| Operating Temperature | 0 to 60°C (32 to 140°F) |
| Storage Temperature | -20 to 75°C (-4 to 167°F) |
| Operation Humidity | 5 to 95% (non-condensing) |
| Weight | 180 g (0.40 lb) |