Power Wattage Consumption

I would consider P-P, ERP, SWR loss. The mathematics becomes a little complicated. Consult a basic electronics or communications text.

Hai

What your said that is correct.But the loop power consuption varied based upon the loop current(4-20ma) .

But the max power is .48watts only.

Regards

GIRITHARAN.R

giritnsf@gmail.com

Not sure I understand your reasoning. For me the spec says power the device with 24Vdc across the 2 leads and the maximum load it can drive is 550ohm.

Inside the sensor there is a device that controls the current flow as well as some circuitry that controls that device. The circuit probably uses little current, so most of the power loss is across the pass element.

At 24V with max current (20mA) there will be 11V across the load and 13V across the sensors internal electronics. Power in sensor P = VI = 260mW , power in the load is P= i^2R = 220mW

So, my guess is that the power 480mW

When using the power formula: P= U*I - than put P in Watts, U in Volts, and I in Amperes. 20 milliamperes = 20mA = 0,020 A (Amperes)* times your voltage = 24 V makes 0,480 Watts or 480 mW (milliWatts)

True, that's the total.

But some power is dissipated in the sensor and some in the PLC's load. It depends on what Rabat is trying to work out.