SCC-TC Series Thermocouple Input Modules User Guide 6 ni.com

The amplified thermocouple signal and cold-junction sensor signal

are measured by ESeries DAQ device channel X and channel X+8

respectively, where X is 0 to 7 depending on where you plug the

SCC-TC0X. Refer to Figure 3 for SCC-TC0X signal connections.

Figure 3. SCC-TC0X Signal Connections

Cold-Junction Sensor Output and Accuracy

The cold-junction sensor voltage output varies from 1.91 to 0.58 V over a

0 to 55 °C temperature range.

Note NI-DAQ includes thermistor conversion utilities that implement the equations listed

below. Refer to your software documentation for more information on these utilities.

Thermocouple
Source
ACH(
X
)
ACH(
X
+8)
SCC-TC0
X
E Series
DAQ Device
+
–
4.75 kΩ
1%
5 kΩ
0.1%
10 kΩ
10 kΩ
2.5 kΩ
+
5 kΩ
at 25o C
10 MΩ
10 MΩ
10 µF
16 V 0.1 µF
0.1 µF
-to
Ref 5 V
Ref 5 V
LM 4040
2.5 V
0.1%
2-Pole Filter/
Buffer Stage
Offset
Calibrator
AISENSE
TC+
GND
(SCC-TC02
only)
TC-
AIGND
+
–