National Instruments 778938-01 Digital I/O Device

National Instruments part number 778938-01 is an identifying part number for the PCI-6515, a bank-isolated digital I/O Device. This device is a 64-channel, 32 Sink/Source Inputs, 32 Sink Output, Digital I/O Device with a maximum voltage range of 30 Volts. It is an industrial digital I/O interface featuring eight banks of isolated channels. With each input bank wired in a source or sink configuration. 

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 fails, the part number 778938-01 can utilize digital I/O watchdogs to switch to a configurable safe output state, ensuring fault detection and safe recovery. Programmable input filters eliminate glitches and spikes, and provide debouncing for digital switches and relays through a software-selectable digital filter. 

Users can program this device to send an interrupt when a change occurs on any input line. The DIO device can monitor changes on selected input lines or all input lines, detecting rising edges (0 to 1), falling edges (1 to 0), or both. When an input change happens, the DIO device generates an interrupt, and the NI-DAQ driver notifies the software. The device supports a voltage range of -30 V to 30 V. 

This NI 778938-01 Digital device features common-mode isolation of 30 VDC between banks and between bank-to-bus connections. It supports data transfers via interrupts and programmed I/O. The device has a typical propagation delay of 80 μs with a 100 Ω load. Additionally, it offers programmable power-up states with a response time of 400 ms.