Modular Systems > National Instruments > FieldPoint

FP-RTD-124

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FP-RTD-124, Four-Wire, RTD and Resistance Input Module

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National Instruments FP-RTD-124 RTD and Resistance Input Module

The NI FP-RTD-124 (Part Number: 777318-124) is an RTD and Resistance Input Module for FieldPoint. This module features eight inputs for 2-wire and 4-wire resistance thermal detectors (RTDs). Each input channel on this module has four terminals: positive sensing input, negative sensing input, excitation output, and common input. With this module, the user can acquire data scaled to resistance or temperature.

The NI FP-RTD-124 comes with integrated linearization algorithms for 100 Ω or 1000 Ω nominal resistance platinum RTDs and 6 TCR values as well. This RTD Module linearizes measured resistance values to return readings in temperature units within the available ranges of –200 to 850 °C, 73 to 1,123 K, and –328 to 1,562 °F. With this model, the user can connect various kinds of RTDs to each channel, since each channel can be configured independently.

The National Instruments FP-RTD-124 module offers a resolution of 0.016 °C and an update rate of 1 update/second per channel. In standard operating conditions, this RTD Module is supposed to draw 35 mW of power from a network module. As far as its data scaling options are concerned, this module offers scaling in resistance (Ω) or various temperature units (°C, °F, °K).

This FieldPoint RTD and Resistance Input Module is completely hot-swappable and is offered with auto configuration provisions. Thus, its installation and configuration process will not affect the user’s system. Another remarkable feature of this module is its built-in signal conditioning capability, which is a function of its 50/60 Hz noise rejection filters.

Model FP-RTD-124
Manufacturer National Instruments
Part Number 777518-124
Type RTD and Resistance Input Module
Input Channels 8
ADC Resolution 16 bits
ADC Type Delta-sigma
Power from Network Module 350 mW
Weight 4.8 oz.
FP-RTD-124 Manual User Manual and Maintenance Manual Available for Download
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National Instruments FP-RTD-124 Frequently Asked Questions

 

Question: What is the excitation current of the FP-RTD-124?

 

Answer: The excitation current of the FP-RTD-124 is 135 ms pulses of 2 mA each second.

 

Question: What is the input noise of the NI FP-RTD-124?

 

Answer: The input noise of the NI FP-RTD-124 is ±1 bit peak-to-peak.

 

Question: If I am using the FP-RTD-124 for an application with long signal wires or high signal noise, are there any precautions I should take?

 

Answer: When using the FP-RTD-124 for applications with long signal wires or high signal noise, the user should utilize a 4-wire RTD with the module to eradicate voltage drop from lead wire resistance and decrease noise errors.

 

Question: Does the NI FP-RTD-124 have channel-to-channel isolation?

 

Answer: No, the NI FP-RTD-124 does not have channel-to-channel isolation.

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Common Typos:

BP-RTD-124, FP-RTX-124, FP-RTV-124, FP-RTD-1Q4, FP-RTD-12T

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