National Instruments SCC-TC Series Thermocouple Input Modules User Manual download pdf (Page 4)

SCC-TC Series Thermocouple Input Modules User Guide 4 ni.com

the inputs of the second-stage SCC. An example of dual-stage conditioning

in an SCC-TC0X followed by an SCC-LP01 lowpass filter module.

Sockets J9 to J16 also are available for digital input/output (DIO)

conditioning or control. Refer to the SC-2345/2350 User Manual for more

information on configuring, connecting, and installing SCC modules

Note SCC-TC0X dual-stage configuration is only available in NI-DAQmx 7.1 or later.

Connecting the Input Signals

Note The signal names have changed. Refer to ni.com/info and enter rdtntg to

confirm the signal names.

The SCC-TC01 has a two-prong uncompensated thermocouple

miniconnector that accepts any miniature or subminiature two-prong

male thermocouple connector. The SCC-TC02 has a three-position

screw-terminal connector that accepts 28 to 16 AWG thermocouple wires.

The screw-terminal connector provides a ground connection for shielded

thermocouples. Otherwise, the two modules function identically.

To use an SCC-TC01, plug the male thermocouple connector into the

module.

The SCC-TC02 accepts up to three signals: TC+, TC–, and GND. TC+ is

the positive thermocouple lead and TC– is the negative thermocouple lead.

The GND terminal connects to AI GND on the E/M Series DAQ device.

The SCC-TC0X has a 10 MΩ bias resistor connected from the negative

thermocouple input to ground. This resistor allows the thermocouple to be

ground-referenced or floating without requiring external bias resistors

connected to ground.

The amplified thermocouple signal and cold-junction sensor signal

are measured by E/M Series 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 1 for SCC-TC0X signal connections.

For ANSI color-coded J-type thermocouples, the red wire is negative and the white wire is positive. Refer to the thermocouple

data sheet if possible. You can find information about other color-coding schemes in the NI KnowledgeBase at

ni.com/

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National Instruments SCC-TC Series Thermocouple Input Modules User Manual Page 4