Part Number 777459-21 corresponds to the National Instruments SCC-AI02 Isolated Analog Input Module, designed for precise measurement of low-amplitude input signals in E/M Series data acquisition (DAQ) systems. This module enhances measurement resolution and accuracy by amplifying and filtering input signals. To install the 777459-21, a SCC-68 Terminal Block or a SC-2345/2350, along with a compatible 68-pin E/M Series DAQ device and cable, are required. It is fully compatible with the latest version of NI-DAQmx and supports application development through LabVIEW. The module features an input voltage range of ±20 V, an output voltage range of ±10 V, and operates with a maximum analog power requirement of 410 mW (13.67 mA at ±15 V). The digital power consumption is up to 650 mW (130 mA at +5 V). Notably, it provides channel-to-earth isolation of 60 VDC (continuous) or 2300 Vrms (withstand) with no channel-to-channel isolation.

With a gain of 0.5 and a low-pass filter bandwidth of 10 kHz, the module supports two Non-Referenced Single Ended (NRSE) input channels, boasting a 1 MΩ input impedance. Its performance metrics include a gain error of up to 4.5% (trimmable to zero), a gain stability of 150 PPM/°C, and an offset error of 40 mV max (RTI2) with an offset stability of 225 µV/°C. The common-mode rejection ratio is 100 dB at 60 Hz, and the output slew rate reaches up to 0.8 V/µs, depending on bandwidth. The I/O connectors consist of a 20-pin right-angle male connector and a 4-pin removable screw terminal, which accommodates wire gauges from 24 to 12 AWG. For safe operation, the maximum working voltage is specified as 42.4 Vpeak or 60 VDC, and the module is designed for use within an operating temperature range of 0 to 50 °C with a relative humidity of 10 to 90% (non-condensing).