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National Instruments 777270-01 Rack-Mounted BNC Terminal Block

Part number 777270-01 is the identifying part number for the National Instruments BNC-2090 Rack-Mounted BNC Terminal Block. This terminal block typically connects to the NI MIO and PC-LPM-16 DAQ boards for a wide range of personal computers like the IBM PC/XT/AT and compatible computers, Macintosh NuBus and compatible computers, Sun SPARCstation SBus computers, and NEC PC-9800 Series computers. 

The 777270-01 consists of 16 analog input channels, which can be used in 16 single-ended or 8 differential configurations. The terminal block is ideal for connecting analog and digital signals to data acquisition boards in industrial and laboratory settings. Furthermore, it also has silkscreened locations for resistors and capacitors if you want to build single-pole highpass and lowpass filters as well as voltage dividers. 

The 777270-01 can be configured in different modes depending on the requirements of the user. The module is factory-configured for use with the MIO board in the DIFF mode. Using the nine front panel switches, it can be configured for differential (DIFF), referenced single-ended (RSE), or nonreferenced single-ended (NRSE) modes. The module is configured in either DIFF or NRSE mode to measure floating signal sources. Likewise, if you want to measure ground-referenced signal source, it is to be configured in either DIFF or NRSE mode. 

The 777270-01 measures (19 by 7.4 by 1.7 in.) in physical dimensions. The block has two 69-position male connectors for I/O purposes. Likewise, it also features 22 BNC connectors, where 18 of those are analog, 2 of those are digital and the remaining 2 are user-defined. Likewise, it also contains 28 spring terminal blocks. The power requirement from the host computer at +5 VDC (±5%) is typically 10 mA when no signal conditioning is installed. Likewise, this can reach up to a maximum of 1 A and is fuse-limited by the host DAQ board. 

The recommended temperature range for the operation of the 777270-01 is 0 °C to 70 °C at a relative humidity of up to 5% to 90% RH. On the other hand, it can be stored at a wider range of –55° to 125° C.