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English Support - Hardware => easy topics (general) => Thema gestartet von: darekd am Juni 22, 2006, 18:47:51 Nachmittag

Titel: darekd
Beitrag von: darekd am Juni 22, 2006, 18:47:51 Nachmittag

How can I use npn (sinking) device on input of Easy819-DC-RC, which allow me connect pnp (sourcing) device only in standard configuration ?

Titel: Re: darekd
Beitrag von: tariq_ghuman am Januar 19, 2007, 17:52:13 Nachmittag

Hi Darek,

As far as I know, there is no way to connect an NPN type sensor on the EASY's.  Only PNP sensors are compatible.

Tariq

Titel: Re: darekd
Beitrag von: ndzied1 am Januar 19, 2007, 19:17:16 Nachmittag

You can wire the npn sensor to a relay and then use the relay to signal to the Easy.

You may also be able to use a pull up resistor with the npn sensor.   When the npn sensor is OFF, the resistor holds the input high.  When the npn sensor is ON, it pulls the easy input low or off.  If you use this method you must invert the logic in the Easy Relay.  Also, you must pick the proper wattage resistor for the current or you will burn it out.

Norm Dziedzic