Inductive 9v sensors

[CNC Noob]

Hello,

 My machine has 9v inductive sensors for homes on all axis.
They are 2 wire sensors that are in a state of 9v @ 1 mA
with no metal present or 9v @ 3 mA with metal present.

Will these work directly on the PMDX-126 ?
If not, is there a board I can buy to make them work?

Sensors look to be actually 8.2v
Namur SI8-N1 (datasheet attached)

Thanks,

Noob

[Steve Stallings]

Hello Noob,

The SI8-N1 sensor requires an external amplifier for proper operation.
Quoted from their web site:

   SENSOR VERSION N IN ACCORDANCE WITH
   NAMUR STANDARDS - DIN 19234 (2 wire)
   These are two-wire non amplified D.C. sensors
   which contain only the oscillator and are adapted
   to control an electronic amplified thereshold
   circuit.

The input circuits on PMDX boards are not designed
to work with this style of sensor and we do not offer
a board with the kind of signal conditioning required.

We recommend using 3 wire sensors.

Regards,
Steve Stallings
PMDX

[CNC Noob]

Thank you Steve.

 Is there an M8 threaded, 3 wire sensor with similar or better range that you can recommend for using with the PMDX-126 ?

Noob

[Steve Stallings]

I will assume that you want the sensor to trigger when it approaches metal. This would
be a Normally Open style of sensor. If necessary you can combine the outputs of several
Normally Open sensors together in this mode.

If you use an NPN sensor, then the PMDX-126 can power your sensors.

Model number AE1-AN-1A from Automation Direct looks like a good fit your your needs.

http://www.automationdirect.com/adc/Search/Search?searchquery=AE1-AN-1A%20&cmd=Search&fctype=adc.falcon.search.SearchFormCtrl&TxnNumber=-1

This sensor is 8mm diameter, has an attached cable, NPN with Normally Open output and has
a sensing range of 1.5 mm maximum. They also offer models with longer range, but with range
comes the possibility of less accuracy.

Regards,
Steve Stallings
PMDX