This document is the technical manual of the 7B27 isolated thermocouple input module, which introduces the characteristics, functions and application scenarios of the module.
The 7B27 is a single‑channel signal‑conditioning module that isolates and amplifies thermocouple inputs (J, K, T, E, R, S, B) and provides precision voltage outputs of either +1 V to +5 V or 0 V to +10 V. It operates from a nominal +24 VDC supply, offers up to 100 V rms isolation, and can be hot‑swapped in a backplane without power interruption.
The handbook includes a functional block diagram, detailed specifications (accuracy, non‑linearity, temperature range, dimensions), pin‑out tables, mechanical drawings, and safety notes such as ESD precautions. It also lists the available model variants and their input/output configurations.
| Supported Thermocouple Types | J, K, T, E, R, S, B |
|---|---|
| Nominal Supply Voltage | +24 VDC |
| Isolation Voltage (front‑end) | up to 100 V rms |
| Common‑Mode Isolation | 1500 V rms continuous |
| Maximum Accuracy | ±0.1 % (typical) |
| Maximum Nonlinearity | ±0.02 % |
| Operating Temperature Range | -40 °C to +85 °C |
| Mechanical Dimensions (L×W×H) | 1.663" × 2.11" × 0.563" (42.24 mm × 53.6 mm × 14.3 mm) |
| Input Pin Protection | up to +30 VDC |
The 7B27 accepts J, K, T, E, R, S, and B‑type thermocouples.
The module operates from a nominal +24 VDC supply.