General
Number of serial ports	2
Data bits	5, 6, 7, 8
Operating current	360 mA
EMC	EN 55032/24
Safety standard	UL 60950-1

The Moxa UPort 1250 is a USB-to-serial adapter that provides two serial interfaces (RS-232, RS-422, RS-485) via a USB 2.0 connection. It is used to connect devices with serial interfaces to modern computers or systems equipped with USB ports, enabling communication with industrial or legacy systems that do not have USB interfaces. The device is designed for use in industrial environments where reliable and robust data transmission is required.

Applications

The UPort 1250 is suitable for applications requiring the connection of serial devices such as measuring instruments, controls, sensors, or industrial peripherals via USB. Typical use cases include integrating legacy systems into modern IT infrastructures, communication with machines in manufacturing technology, or connecting terminal devices in logistics. Support for multiple serial standards (RS-232, RS-422, RS-485) enhances compatibility with various devices and protocols.

Functions and Features in Detail

The device features two serial ports, each connected via a DB9 male connector. The baud rate can be set between 50 bps and 921.6 kbps, allowing flexible adaptation to different transmission speeds. Data bits can be configured to 5, 6, 7, or 8 bits, stop bits to 1, 1.5, or 2, and parity can be set to None, Even, Odd, Space, or Mark. Flow control supports options None, RTS/CTS, and XON/XOFF, optimizing communication with various serial devices.

Technology Explained Simply

The UPort 1250 operates according to the USB 2.0 standard, which enables a maximum data transfer rate of 480 Mbps. The serial interfaces support RS-232, RS-422, and RS-485 standards, with RS-422 and RS-485 being suitable for longer transmission distances and higher noise immunity. The RS-485 interface can operate in both 4-wire and 2-wire mode. Power supply is provided via the USB connection at 5 VDC, with an operating current of 360 mA. The device is designed for operation at temperatures from 0 to 55 °C and can be stored at temperatures from -20 to 75 °C. Relative humidity is 5 to 95 %, non-condensing.

Compatibility and Accessories

The UPort 1250 is compatible with devices supporting serial interfaces according to RS-232, RS-422, or RS-485. Connection is made via a USB Type B connector on the device and DB9 male connectors on the serial ports. Support for the mentioned serial standards enables connection to a wide range of industrial and technical devices.

Mounting and Installation

Installation is performed by directly connecting the USB Type B connector to a USB port on the host computer and the DB9 male connectors to the serial devices. No additional installation steps or external power supply are required, as the device is powered via the USB connection. Physical dimensions are 77 x 26 x 111 mm, and the device weighs 180 g.

Operational Advantages

The UPort 1250 provides a reliable and robust interface for communication with serial devices. Support for multiple serial standards and flexible configuration of transmission parameters enable broad application. Power supply via USB reduces the need for additional power sources. Compliance with standards EN 55032/24, CISPR 32, FCC Part 15B Class 1, and safety standard UL 60950-1 ensures safe and interference-free operation. Environmental approvals RoHS, CRoHS, and WEEE indicate the product’s environmental compatibility. The MTBF is 563,179 hours according to Telcordia (Bellcore) and GB standards, indicating high reliability.