3B47 is a thermocouple input module from Analog Devices, which has isolation, linearization and other functions.
The 3B47 is a single‑channel isolated thermocouple signal‑conditioning module that amplifies, filters, isolates, and linearizes inputs from J, K, T, E, R, S or B‑type thermocouples. It is intended for industrial signal conditioning, isolation, and filtering applications such as temperature, pressure, and flow monitoring.
Key specifications include +1500 V peak galvanic isolation, 160 dB common‑mode rejection, 0.1 % accuracy, and dual high‑level analog outputs (0‑10 V and 4‑20 mA). The module is hot‑swappable, mix‑and‑match compatible, and available in a range of input‑type models with detailed pin‑out diagrams and mechanical dimensions.
| Isolation Voltage | +1500 V peak |
|---|---|
| Common‑Mode Rejection (CMR) | 160 dB @ 50/60 Hz |
| Normal‑Mode Rejection (NMR) | 60 dB @ 50/60 Hz |
| Accuracy | +0.1 % |
| Rated Temperature Range | -28 °C to +85 °C |
The module provides +1500 V peak galvanic isolation.
The CMR is 160 dB at 50/60 Hz.