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How to choose the proper output circuit

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  • Luglio 4, 2017 alle 5:29 pm #34875
    Anonimo
    Inattivo

    I would like to know pros and cons to use relay or static or SSR for SlimLine extension module ?

    For my application i don’t know what can I use, I need ouput can support:
    – many uses per hours : 2000 closes per hours during at least 3 years
    – my other interface check if ouput will by close by using DC 5V@5mA so it have no large power
    – I need to know Ton and Toff and it will be stable between temperatures like -10°c to 50°c

    Luglio 6, 2017 alle 10:19 am #37837
    Sergio Bertana
    Amministratore del forum

    The SlimLine 16+8 digital I/O expansion module is available in two models. The one that uses a relay output circuit (Relay datasheet), typically has a minimum electrical life of 100000 cycles (2A 250Vac, 30Vdc, resistive load). The SSR model (SSR module datasheet), instead has an extremely long life.

    The SlimLine Static output expansion I/O module has an electronic driver output (Output driver datasheet), this output has an extremely long life, it cans drive only DC circuits with voltage from 10.5 to 45 Vdc.

    So for the the application on wich you need 2000 cycles per hour. If your load is an AC you can use the SSR output. If your load is DC you can use the static output. To close the 5Vdc circuit you must use the relay outputs. About the TOn/TOff times they are stable on the temperature range you request.

    Luglio 7, 2017 alle 9:48 am #36458
    Anonimo
    Inattivo

    hi bertaser, thanks for your answer, now it’s clear for me.
    In static output, If use a externe power supply (eg example 12VDC) between Com+ and Com-, you plug my check board gnd with Com- and this input in DO7, when DO7 will be high, how many voltage do we have between DO7 and Com-? I think near COM+ so voltage deliver by power supply, it’s right?

    Luglio 8, 2017 alle 9:49 am #36293
    Sergio Bertana
    Amministratore del forum

    Yes it’s right, you can power the output circuit with an external power supply. The minimum voltage you can use is 10.5 Volts and the value of the output voltage on the active outputs will be very near to the voltage applied.

    The output driver is a MOS circuit, so it in the On state has a resistance of 150mOhm as reported on the datasheet. So the voltage drop depends on the load you apply at the output.

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