Cool Panasonic GX-12 proximity sensors; hookup question.

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posting becasue these useful sensors , because have question using them.

i needed reliable sensor limit switch, , found these cool panasonic sensors:  http://pewa.panasonic.com/automation-controls/sensors/proximity-sensors/gx-f_h/

extensive data sheet here:  http://pewa.panasonic.com/assets/acsd/sunx/sensors/catalog/gx-f_h-catalog.pdf

basically small metal detector, coil , oscillator,  closes circuit when conductive gets near.  can set precisely; small, , water/oil proof.  around $30; worth every penny me.  indicator light on them super handy setting , troubleshooting.

two questions, i'm not expert in electronics:  1 got hold of npn type, see circuit figure attached.  i'm used open collector pnp sensors; send signal wire arduino pin, use external or internal pulldown resistor; 5v (high) when on.

but can't head around one.  connected signal pin; used internal pullup resistor code, , looked low, , worked perfectly.  since don't understand transistors, i'm assuming voltage/current out of digital arduino pin enough pass through transistor in sensor.  reverse of pnp, right? (and "sourcing" v. "sinking," maybe?)

second, datasheet says unit needs 12-24v.  have available in setup (from stepper driver), seems work fine @ 5v.  make lot of science instruments thing, ok 5v of them?



many thanks!  we're developing open source tools our river models; www.emriver.com .



Arduino Forum > Using Arduino > Sensors > Cool Panasonic GX-12 proximity sensors; hookup question.


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