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National Instruments 779084-01 Digital I/O Device

Part number 779084-01 from National Instruments is the identifying part number for the PCI-6518 Digital I/O Device. This device consists of sinking/sourcing 16 isolated digital input channels and sourcing 16 digital output channels, both input and outputs require a maximum voltage of up to 30 VDC that makes it suitable for high loads applications such as relays, solenoids and actuators. The 779084-01 device has an input logic low voltage from 0 to 4 VDC and input logic high voltage from 11 to 30 VDC. It requires a connector Type of 37-pin male D-SUB that ensures easy integrations into other digital devices.

The digital I/O device has compact design with dimensions of  16.5 cm × 12.6 cm (6.51 in. × 4.97 in.) and weighs 70.9 g making it lightweight. This module is designed to operate at an ambient temperature of 0 to 50 degrees Celsius with a relative humidity level ranging from 10% to 90%, noncondensing and storage temperature of -20 to 70 degrees Celsius with a relative humidity level ranging from 5% to 95%, noncondensing. The 779084-01 is designed to be mounted at an altitude of 2000 meters (at 25 degrees Celsius ambient temperature). 

This device is engineered to endure harsh working conditions, with an operating vibration of 5 Hz to 500 Hz, 0.3 grms that is random under the IEC-60068-2-64 standard and nonoperating vibrations from 5 Hz to 500 Hz, 2.4 grms, with operating shocks of 30 g peak, half-sine, 11 ms pulse (tested in accordance with IEC-60068-2-27) standard. This device requires power consumption of +5 VDC at a typical 250 mA current and +3.3 VDC at a typical 300 mA current.

The 779084-01 model also include programmable power-up states, ensuring that outputs assume a known state during initialization, and a typical propagation delay of 80 microseconds with a 100 ohm load, which is essential for timing sensitive applications. The device supports both interrupts and programmed I/O data transfers, offering flexibility in how data is managed and processed and with these, it reduces the load on CPU by eliminating the need for constant polling and allows the system to respond quickly to real-time events.