Power LED directly from PLC output

4 posts in this topic

Hi All,

We have an old machine using a Mitsubishi Fxo-30MR/ES and I will be replacing the PLC with a FX3S-30MR/ES.  This old machine would power some led's on a panel mounted PCB using the PLC outputs.  The 24V from the PLC output would go to the PCB board where a resistor would drop the voltage for the LED.  

This PCB is damaged I would like to avoid getting a new PCB made and instead power some panel mounted LED rated for 24V directly form the PLC output.  I guess these panel mounted LED have a built-in resistor.  Power consumption for the LEDs are 20mA at 24V volts.  The 24V power supply has plenty of capacity for this.

Are there any issues with doing this?

I have attached the spec sheet for the panel mounted LED (I will be using the 24V versions).


Panel Mounted LED.pdf

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I used only with Beckhoff 24Vdc LED connected directly to the outputs and did not have any problems.

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