NI AT-485/2 2-Port ISA Serial Interface

Tektronix DPO4COMP RS-232 422 485 UART Serial Trigger & Analysis Module

USED NI PCI-8431-2 High-Performance 2-Port Serial Interface (RS485) Test passed

NI AT-232/2 2-Port ISA Serial Interface

Audio Precision PCI-2 / PCI2 APIB ISA Interface Module

NI PCI-8431-2 High-Performance 2-Port Serial Interface (RS485) Test passed spot

NI AT-GPIB GPIB Interface Card for ISA Bus

NI National Instruments PCI-8430/4 4-Port RS23N2 Serial Interface Card w/ Cables