NI-DAQmx
Provides support for NI data acquisition and signal conditioning devices. 
NI-VISA
Provides support for Ethernet, GPIB, serial, USB, and other types of instruments. 
NI-488.2
Provides support for NI GPIB controllers and NI embedded controllers with GPIB ports.

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PCI-6528

Digital I/O Device

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48-Channel, 24 Sink/Source Inputs, 24 Sink/Source Outputs, Channel-Channel Isolated, Digital I/O Device—The PCI-6528 is an industrial, parallel digital I/O interface.With programmable power-up states, you can configure the initial output states in software, to ensure safe operation when connected to industrial actuators. If a computer or application fault occurs, the PCI-6528 can use digital I/O watchdogs to switch to a configurable safe output state to ensure detection and safe recovery from fault conditions. Programmable input filters eliminate glitches/spikes and provide debouncing for digital switches/relays through a software-selectable digital filter.