Questions

Voting analog signals

Tags: Security
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Voting analog signals

ramhoysal
I would like to vote the analog output signals from different channels which will be either /-5V, 0V to 10V, /-10V, 0-20mA, 4-20mA. Please suggest how to achieve this. This is required to move the system to a safe state when ever there is a failure of one of the system in redundant environment

Clarifications

robo_dev

What do you mean by voting? Do you mean measuring? Is there a computer, data acquisition hardware or application involved with any of this?

Member Answers

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    TheChas

    Years ago, you would have used signal conditioning circuitry and then a set of comparators to allow for any out of band signal to set a fault condition.

    Now, you can use any of a number of ADC or Data Acquisition boards to perform an analog to digital conversion, then use software to flag the out of band signal and signal for a shutdown.

    Companies such as Dataq Instruments and Measurement Computing have a lot of options for you to look at.

    Measurement Computing just introduced a DAQ module that includes BlueTooth along with SDK software for Android apps.

    Chas