National Instruments NI SCXI-1303 32-Channel Isothermal Terminal Block

$35.00
Used but in very nice condition.

The SCXI-1303, 32-channel isothermal terminal block is a shielded device with screw terminals that connect to the SCXI-1102/B/C and SCXI-1100 modules. The SCXI-1303 has a high-accuracy thermistor cold-junction temperature sensor, and an isothermal copper plane to minimize the temperature gradients across the screw terminals when you take measurements with thermocouples.

The terminal block has 78 screw terminals for easy signal connection. Thirty-two pairs of screw terminals connect to the 32 differential inputs of the SCXI modules. One pair of terminals connects to the chassis ground pins of the module. Three terminals connect to the SCXI module OUTPUT and AOREF pins and to the SCXIbus GUARD. All of the other terminals—OUT0+, OUT0–, OUT1+, OUT1–, OUT2+, OUT2–, OUT3+, OUT3–, and AIREF—are reserved for future use.

For each input channel, the terminal block has a pullup resistor connected between CH+ and +5 V and a bias resistor connected between CH– and chassis ground. These resistors help you detect open thermocouples by saturating the module amplifier output.