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National Instruments 779312-01 Digital I/O Device

The part number 779312-01 from National Instruments is the identifying part number for the PCI-6521 Digital I/O Device. This device features configurable 8 bipolar isolated input channels with an input voltage range of –30 VDC to 30 VDC. It has an isolation voltage range of 60 VDC continuous channel-to-channel and 150 V continuous channel to bus and channel to earth. It offers an input current rating of a maximum of 4.5 A current per channel at 11 V input and 12.5 mA per channel at 30 V input. Similarly, this module features 8 electromechanical relay output channels that can be configured as 3-channel SPDT and 5-channel SPST. 

The output channels of the 779312-01 require a maximum switching power of 60 W with a maximum voltage of 150 VAC and have a maximum current of 2 A per channel. Its initial DC path resistance is less than 0.2 ohms typical and an end of life resistance greater than 1.0 ohms, ensuring that the module operates within acceptable limits throughout its lifecycle. Its relay operating time is 2 ms typical, and 4 ms maximum with an expected maximum mechanical relay life of 100,000,000 cycles and electrical ranging from 100,000 cycles to  500,000 cycles.

The 779312-01 Digital I/O Device has physical dimensions of 17.5 cm × 9.9 cm (6.9 in. × 3.9 in.) and weighs 170.0 g (6.0 oz). To operate this module, its power requirements are 400 mA typical and 600 mA maximum at 5 V providing enough power for its reliable operations.

This I/O device is designed to operate at an ambient temperature range of 0 to 55 degrees Celsius with a humidity range of 10% to 90%, noncondensing while for its storage, it requires a suitable temperature of -20 to 70 degrees Celsius and a relative humidity range of 5% to 95%, noncondensing. The  is required to be mounted at a maximum altitude of 2000 meters, has a pollution degree of 2, and is intended for indoor use only where nonconductive pollution occurs. Its operational shock rating is 30 g peak, half-sine, 11 ms pulse, and has random operating vibration of 5 to 500 Hz, 0.3 grms.