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Last Post 08/08/2014 9:23 AM by  Tony Hodges
CR5210-2 overcurrent questions
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04/07/2011 8:48 AM
    Greetings, I have two small servo motors that I’m attempting to monitor current draw at the operators station with inexpensive panel meters. The average current draw is around 400mA with peaks in the 1.25A region, but in an overload/binding situation, the motor/drive briefly spike to approx 8A before faulting out, destroying the ammeter(s).

    Will the CR5210-2 tolerate overcurrent conditions with no ill effects to the transducer, and/or whatever is connected to the transducers output?

    Thanks!
    Tony Hodges
    CRM Staff
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    Posts:149


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    04/07/2011 4:50 PM
    Dear Valued Customer,

    The CR5210 will handle the spike with no ill effects. Overcurrent will cause the output amplifiers to go to the rail, which for the CR5210 is 12 VDC. Please make sure the designer evaluates the instrument burden placed on the CR5210 to determine livability.
    Kyle Heikkinen
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    08/07/2014 9:44 AM
    Our CR5210-10 experienced a short circuit and now the voltage output doesn't change. Is there an absolute current limit or is this behavior unexpected?
    Tony Hodges
    CRM Staff
    Basic Member
    Basic Member
    Posts:149


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    08/08/2014 9:23 AM
    Dear Sir,

    The specifications state the minimum load resistance on a voltage output unit to be 2K or higher. While the output stage of the device has short circuit protection, the negative power supply was probably damage from the overcurrent driven into the load. The unit will need to be repaired. Please note that overcurrent in the sensing window does not damage the part.

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