COM'X 210/510 Digital Input Type (NPN or PNP?)

[Hady_Kholeif]

Hello,

I have a project to integrate readings from a condensate meter (steam) into PME. Either the COM'X 210/510 are being considered to read the scaled pulse output from the device depending on whether on-board data logging is required.

Considering that the sensor/meter has an NPN scaled pulse output, it is important that the COM'X digital input card be of the same type.

What type are the COM'X 210/510 digital inputs? (E.g. NPN or PNP). Depending on the type of the COM'X digital inputs we may or may not require a PNP to NPN converter.

Thanks,

Hady

[Randi_Dolan · Accepted solution]

Hi,

Actually, it's neither.  They are connected to a diode resistor divider network.  The output of it is connected to a high impedance comparator. 

Here's how we recommend connecting:

Please let us know if you have any other questions or concerns.

Regards,

Randi 

[Hady_Kholeif]

Hi Randi,

Thank you for your response. I will wire this setup on a test-bench and let you know.

Regards,

Hady