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Industrial USB >
Introduction to USB Connectivity
Device Connectivity
UPort
®
1250/1250I
2-port RS-232/422/485 USB-to-serial converters with
optional 2 KV isolation
The UPort® 1250/1250I USB-to-serial converters allow you to connect
2 RS-232/422/485 devices to your laptop or workstation through the
USB (Universal Serial Bus) port. These plug & play USB solutions are
perfect for mobile, instrumentation, and point-of sale applications.
In medical labs, research scientists typically collect large quantities
of data from many samples using a variety of different instruments.
Most research devices have parameters that can be accessed via a
serial port for convenient reconfiguration. Laptops are often used as
convenient and space-efficient computing solutions in medical labs,
but most modern laptops no longer offer serial ports and only come
equipped with USB ports. This presents a connectivity issue unless the
USB ports can be expanded into serial ports.
Moxa’s solution is the UPort® 1250, which is an RS-232/422/485
USB-to-serial converter that can be used to connect 2 serial interface
instruments to a computer’s USB port, and is particularly convenient
for medical researchers since advanced technical expertise is not
required. The UPort® 1250 has the following features:
• 2 serial ports for easy USB-to-serial expansion
• True USB 2.0 high-speed transmission
• 128-byte FIFO and on-chip hardware and software flow control to
ensure stable data transmission
• Easy troubleshooting with LED indicators for each serial port
• Compatible with both laptops and desktop PCs
Typical Application—Connecting Instruments in a Medical Lab
Specifications
Overview
› Hi-Speed USB 2.0 for up to 480 Mbps USB transmission
› 921.6 Kbps maximum baudrate for super fast data transmission
› 128-byte FIFO and on-chip H/W, S/W flow control
› 15N high retention type B connector
› Drivers provided for Windows, WinCE, and Linux
› LEDs for easy monitoring
› 15 KV ESD protection for all serial ports
› Locking power cord for the UPort 1250I
USB Interface
Compliance: USB 1.1/2.0 compliant
Connector: USB type B
Speed: 480 Mbps (Hi-Speed USB) and 12 Mbps (Full-Speed USB)
Serial Interface
Number of Ports: 2
Serial Standards: RS-232/422/485
Connector: DB9 male
Serial Line Protection
ESD Protection: 15 KV embedded
Optical Isolation: 2 KV (UPort 1250I only)
Performance
Baudrate: 50 bps to 921.6 Kbps (including 500 Kbps)
Serial Communication Parameters
Data Bits: 5, 6, 7, 8
Stop Bits: 1, 1.5, 2
Parity: None, Even, Odd, Space, Mark
Flow Control: RTS/CTS, XON/XOFF
FIFO: 128 bytes
Serial Signals
RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
RS-422: TxD+(B), TxD-(A), RxD+(B), RxD-(A), GND
RS-485-4w: TxD+(B), TxD-(A), RxD+(B), RxD-(A), GND
RS-485-2w: Data+(B), Data-(A), GND
RS-485 Data Direction: ADDC® (Automatic Data Direction Control)
Driver Support
Operating Systems: Window 2000, Windows XP/2003/Vista/2008/7
x86/x64, WinCE 5.0/6.0, Linux 2.4.x, 2.6.x, 3.0.x
Note: Please refer to Moxa’s website for the latest driver support information.
UPort® 1250
UPort® 1250I
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