National Instruments SCXI-1303

The SCXI-1303 is a terminal block for use with the SCXI-1100, SCXI-1102, and SCXI-1102B/C modules. Designed especially for high-accuracy thermocouple measurements, the SCXI-1303 includes isothermal construction that minimizes errors caused by thermal gradients between terminals and the cold-junction sensor. The SCXI-1303 also includes circuitry for open-thermocouple detection as well as automatic ground referencing for floating (nongrounded) thermo-couples. When used with the SCXI-1102 or the SCXI-1102B/C, the SCXI-1303 provides a high-impedance path (10 M Ohm) from the negative input terminal to ground, so that the system works reliably with either floating or grounded thermocouples. When using the SCXI-1100, you can configure the channels of the SCXI-1303 for either floating or ground-referenced sources in blocks of eight channels.