Isolated Industrial Signal Conditioning RTD amplifier for temperature applications

Interfaces to 100Ω Platinum RTDs
Linearizes RTD Signal
High Level Voltage Outputs
1500Vrms Transformer Isolation
ANSI/IEEE C37.90.1 Transient Protection
Input Protected to 240VAC Continuous
120dB CMR
70dB NMR at 60Hz
Low Drift with Ambient Temperature
CSA, FM and CE Certifications Pending
Mix and Match Modules

DI-8B modules are an optimal solution for monitoring real-world process signals and providing high level signals to a data acquisition system. Each DI-8B34 module isolates, filters, amplifies, and linearizes a single channel of temperature input from an RTD and provides an analog voltage output.

RTD excitation is provided from the module using two matched current sources. When using a 3-wire connection, this method allows equal currents to flow through the sensor leads, cancelling the effects of lead resistances. The exciation currents are small (0.25mA) which minimizes the self-heating of the RTD.

Signal filtering is accomplished with a three-pole filter optimized for time and frequency response which provides 70dB of normal-mode-rejection at 60Hz. One pole of this filter is on the field side of the isolation barrier for anti-aliasing, and the other two are on the system side.

A special input circuit on the DI-8B34 module provides protection against accidental connection of power-line voltages up to 240VAC. Clamp circuits on the I/O and power terminals protect against harmful transients.

The modules are designed for installation in Class I, Division 2 hazardous locations and have a high level of immunity to environmental noise.

Want to port your data into a spreadsheet or a database?

Check out our add-on software:

WinDaqXL This WinDaq Software data acquisition add-on allows you to port acquired data directly into a Microsoft Excel Spreadsheet in real time. 60-day Trial Version available.

Also check out the DATAQ Developer Network to learn how to use our ActiveX controls with Microsoft Excel and Access.

WinDaq/MySQL This free WinDaq Software data acquisition add-on allows you to port acquired data directly into a MySQL database in real time.

Part #	Price	Order
DI-8B34-01 -100°C to +100°C (-148°F to +212°F)	$113	Quantity:
DI-8B34-02 0°C to +100°C (+32°F to +212°F)	$113	Quantity:
DI-8B34-03 0°C to +200°C (+32°F to +392°F)	$113	Quantity:
DI-8B34-04 0°C to +600°C (+32°F to +1112°F)	$113	Quantity:
Accessories Backplanes and Power Supplies.	N/A	Go to Accessories

Note: Pricing outside the U.S. will be higher to account for shipping, taxes, duty, currency fluctuation, local warranty and technical support in your country.
DI-8B Signal Conditioners have typical lead times of 2 weeks ARO.

View the DI-8B Module Selection Guide

Compatible Products

	DI-788 Features 32 channels designed specifically for DI-8B modules, 14-bit resolution, and up to 180 kHz sample throughput rate.
	DI-718B Data Logger Features 8 channels designed specifically for DI-8B modules, 14-bit resolution, up to 10 kHz sample throughput rate, and a stand-alone data logger option.
	DI-718Bx Data Logger Features 16 channels designed specifically for DI-8B modules, 14-bit resolution, up to 10 kHz sample throughput rate, and a stand-alone data logger option.
	DI-78B Backpack 8B module expansion device for DI-720, DI-722, and DI-730 instruments featuring 8 channels designed specifically for DI-8B modules

	Try out our NEW data acquisition and data logger product screener for help choosing the right product for your application
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