SSP-100 - Single channel RS-232 asynchronous -PCMCIA

$125.13

DSP-100 - Dual channel RS-232 asynchronous

$193.03

SSP-200/300 - Single channel RS-422 or RS-485 asynchronous

$144.53

DSP-200/300 - Dual channel RS-422 or RS485 asynchronous

$222.13