The input requirement of P3 series relay for "Trip circuit supervision with two combined digital inputs".

[Johnny-Sun]

Hi,

As I know, there is some input requirement for "Trip circuit supervision with two digital inputs".

If I design the control circuit with "Trip circuit supervision with two combined digital inputs",

do I need to select a lower switching threshold or reverse the polarity of digital input?

BR

Johnny

[Karthik.P]

Dear Mr. Johnny Sun

If you are using trip circuit supervision with 2 digital inputs, then you need to select a lower switching threshold voltage. The relay ordering code will have options to choose the operating voltages for the first 2 Digital inputs. 

Regards

Karthik.P

Regards

Karthik.P

[Johnny-Sun]

Dear Karthik.P

Thanks for your comments.
For using trip circuit supervision with 2 digital inputs, the description is very clear in P3 series user manual.
Two DIs are connected in series.

Another 2 digital inputs type:
Two DIs are connected in parallel.
It is called " Trip circuit supervision with two combined digital inputs" in the user manual.
I can not find the detial information of those digital inputs.
Kindly refer to the attached .JPG file.

BR
Johnny

[Karthik.P]

Dear Mr. Johnny Sun

If you are choosing 'Trip circuit supervision with two combined digital inputs' then you no need to select a digital input with lower pickup threshold setting. 

Regards

Karthik.P 

[Johnny-Sun]

Dear Karthik.P

Thanks for your support.

BR

Johnny