Mfg. Part Number
QSU-200/300IND
 
Brand
Quatech
 
Features
4 independent ports (USB to RS-422/485)
Each port configurable to RS-422 or RS-485
Device enumerates itself as standard port(s)
Max baud rate 460.8k bps
Full modem control and hardware and software flow control (RS-232)
Bus powered, no external power required
Windows 98/Me/NT/2000/XP, Linux, OS/2 and Sun Ray Server support
Surge suppression available
5 year warranty
 
Serial Specs
Each port configurable to RS-422 or RS-485
16550 UARTs with 16-byte FIFOs (1 per port)
Transceiver: SP211HB
Surge suppressor applied to each line that is capable of sustaining up to 40A peak, 8 x 20µs transient surges, a clamping voltage of 30V and a peak energy dissipation of 0.1 Joules. (NOTE: The "IND" option limits data rate to 230.4 kbps)
 
Power Requirements
Bus-powered device, no external power supply required.
Suspended:< 500 µA
Unconfigured:< 100 mA
Configured:< 500 ma