New Isolated High-speed IOLITEi 8xRTD-HS Module

Primož Rome

April 19, 2023

The IOLITEi 8xRTD-HS is a new version of the 8-channel IOLITE temperature module. It is a channel-to-channel isolated DAQ device for temperature measurements using resistance temperature detectors (RTD).

The primary purpose of this device is to address the growing need for stable temperature measurements in an EMC harsh environment. E.g. on the stator of an electric motor or near inverters. The new module not only improves the EMC immunity of the last unit on the digital side but also utilizes a sharp analog antialiasing filter (3rd order, -3dB @ 1kHz) and digital FIR filters to remove unwanted frequencies.

The input connector of the module is 6-pin 0B Series Lemo connector (IOLITEi 8xRTD-HS).

An additional connector option is a 4-pin 2.5 mm pitch terminal block connector (IOLITEi 8xRTD-HS-T2A4f)

The module uses a new 24-bit ADC with sampling rates of up to 10 kS/s per channel. This enables IOLITEi 8xRTD-HS to be used in the dynamically most demanding applications to record transients of temperature shock.

A higher sampling rate enables Dewesoft filtering technology using digital FIR filters to reduce noise floor down to and reach a resolution of less than 1 mK.

The RTD-HS module will be sold in parallel with an existing RTD module, but only for the EMC immunity-related applications and the applications with higher sample rate needs.

As with all IOLITE standard modules, also IOLITEir-8xRTD-HS is equipped with two EtherCAT buses in parallel for both DAQ and real-time control. It can be mounted in all standard rack chassis (IOLITE-R12, IOLITE-R8, IOLITE-R8r).

You can expect a standalone version of IOLITEi-8xRTD-HS with a single EtherCAT bus shortly.

For more information and complete technical specs visit the IOLITE rack and IOLITE modular product pages.