Measurement Specialties CIO-SSH16 user manual Differential, Example

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A floating differential hookup is handy when the signal source is floating with respect to ground, such as a battery, 4-20 mA transmitter or thermocouple and the lead lengths are long or subject to EMI interference.

The floating differential input will reject up to 10V of EMI energy on the signal wires.

WARNING!

Verify that the signal source is really floating. Check it with a voltmeter before risking the CIO-SSH16 and PC!

3.4 DIFFERENTIAL

A differential signal is three wires from the signal source. The signals are Signal High (CH# HI), Signal Low (CH# LO) and Signal Ground (LLGND).

A differential connection allows you to connect the CIO-SSH16 to a signal source with a ground that different than the PC ground, but less than 10V difference, and still make a true measurement of the signal between CH# HI and CH# LO.

EXAMPLE:

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Contents CIO-SSH16 Copyright 2000 Measurement Computing Corp Adding Amplifiers & Sample / Hold Chips This page is blank Hardware Installation Software InstallationIntroduction Power Cable Signal Cable Power ConnectorAnalog Input Board Setup Gain SwitchesAnalog Inputs Signal ConnectionConnector Diagram Floating DifferentialDifferential ExamplePage Analog Input ArchitectureAmplification CIO-SSH16 vs. Programmable Gain A/D Boards Sample & Hold S15 S16 Sample and Hold Timing Diagram Droop RateRange Calculation Resolution CalculationAdding Amplifiers Sample / Hold Chips Time to Sample CalculationSpecifications Analog input sectionSample / hold section Analog Electronics Voltage DividersPage Common Mode Range Differential & Single Ended InputsPage Ground Loops Common MisunderstandingsLOW Pass Filters A/D Resolution & Engineering Units Converter # VoltsEngineering Units Current Loop 4-20 mANoise Sources of NoiseSignal Wire Noise Sensor NoiseSmoothing Data For your notes EC Declaration of Conformity
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