DSC-200/300 - 2 Port RS-422/485 Board w/ 16550 UARTs

$144.53

DSC-200/300IND - 2 Port RS-422/485 Board w/ surge suppression

$163.93

QSC-200/300 - 4 Channel RS-422/485, with 16550 UARTS

$232.80

QSC-200/300IND - 4 Channel RS-422/485, with surge suppression

$271.60

DSC-20016 - 2 Port RS-422/485 Board w/ 16550 UARTs - With 16 Mhz Crystal - Special Order-call for availability

$222.13