Fluke Universal Input Module for the 2645A

The Fluke 2645A Universal Input Module expands the signal conditioning and measurement capabilities of the Fluke 2645A data acquisition system. This module accepts diverse input types - voltage, current, thermocouples, RTDs, and resistance - enabling integration with a broad spectrum of sensors and instruments across industrial and laboratory environments.

Technical Specifications The module integrates with the Fluke 2645A NetDAQ front end, a 20-channel unit operating with NetDAQ Logger for Windows. The 2645A supports up to 1000 measurements per second with a 16-bit analog-to-digital converter delivering 3 µV and 0.2°C resolution. Common mode rejection reaches ≥100 dB (AC and DC) with ±0.1% maximum 1 kΩ source imbalance. Normal mode rejection is 50 dB @ 50/60 Hz, ±0.1%. Maximum common mode voltage is 50 VDC or 30 VAC rms across all channels. Operating temperature range: -20 to 60°C (-4 to 140°F).

Key Features

Measures DC volts, AC volts, ohms, frequency, and DC current

Temperature measurement via thermocouple or RTD inputs

20 analog input channels, expandable to 400 channels

Ten computed channels supporting addition, subtraction, multiplication, division, logarithms, natural logarithms, exponentiation, square roots, absolute values, integer functions, and averages

Data buffer memory stores timestamps, all analog input channels, eight digital I/O status, and totalizer count per scan

Ethernet connectivity for network integration

Alarm/Trigger I/O and Digital I/O connectors

Serial port interface

RFI suppressed; complies with BMPT Vfg 243/1991 and FCC Part 15 Class B limits

Compatibility & Integration Designed exclusively for the Fluke 2645A data acquisition system. Connects via standard industrial interfaces for rapid deployment in networked measurement environments.