Interworld Electronics QSU2-540 industrial communications module
The QSU2-540 industrial communications module has four independent serial ports with each port able to support RS232, RS422 or RS485 protocols.
It is a high-speed USB 2.0 to serial converter with 1 Kbyte receive and transmit buffers, allowing the four ports to reach communication speeds of up to 921.6 Kbps. The series is USB port powered and an optional external power pack can be connected that also provides power output in RS232 mode on pin 9 of the DB9 connectors to power external devices.
The series is supplied in a rugged industrial case with 4x DB9 connectors for RS232 connections and terminal blocks for RS422/485 connections. Optional 3000 VDC-to-DC optical isolation for factory floor applications is also available.
The QSU2-540 is compatible with most USB-supported operating systems and is supplied with a Linux, Windows 2000/XP/2003/Windows 7 driver package.
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