The NI FP-TB-3 is an isothermal FieldPoint terminal base designed for thermocouple I/O modules.
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Key product information and technical features.
The base provides field wiring, I/O module mounting, and the communication link to FieldPoint network modules.
NI recommends the FP-TB-3 for FP-TC-120 thermocouple measurements because its isothermal construction reduces temperature differences across the terminals. Installation still matters: nearby heat sources and heat conducted through thermocouple wires can introduce measurement errors.
Verified product specifications.
| Numbered terminals | 16 |
|---|---|
| Terminal type | Screw |
| Screw torque | 0.5–0.6 N·m |
| Weight | 240 g |
| Operating temperature | −40 to 70 °C |
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Manufacturer
Distributed I/O platform
Terminal base
Supports FP-TC-120. Other I/O modules must require no external power and use only terminals 1–16.
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Product-specific answers based on available technical information.
FP-TB-3 has isothermal construction. NI explains that FP-TB-1 and FP-TB-2 lack this construction and are more susceptible to thermal-gradient errors.
NI recommends small-gauge thermocouple wire, keeping wires together near the base, and avoiding hot or cold objects that could conduct heat through the wires.