Digital Pressure sensor need help

Thread Starter

champ1

Joined Jun 4, 2018
119
Hello!

I'm working on a project to measure the pressure, I have a DP-102-E-P and I am trying to interface it to the AT89c51


Here is the datasheet for the sensor I am using, model number is DP-102-E-P:



Now I'm having problem with wiring.

as understand
blue is negative
Brown is positive
Black is output
white -- ?

anyone can help me to identify correct wires ?
 

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ericgibbs

Joined Jan 29, 2010
9,768
hi,
As the d/s clip states, if not used the White lead can be disabled, I read that as not being externally connected.
ie: don't use, leave disconnected.
E
 

LesJones

Joined Jan 8, 2017
2,597
When you say "interface it to the AT89c51" Do you mean to ?
1 Switch the power on and off the the At89C51
2 Read the state of the output to a digital input on the At89c51
3 Read an analogue value from the sensor.
I think options 1 & 2 are possible but I don't think option 3 is possible.

Les.
 

bertus

Joined Apr 5, 2008
20,442
Hello,

The EP-102-E-P is a standard pressure sensor that has two comparator outputs.
There is no analog signal available.
As said, the black wire is the output of comparator 1 and the white wire is the output of comparator 2.
You can only sense of the comparators are tripped.

Bertus
 

shteii01

Joined Feb 19, 2010
4,644
Eh... AT89 is 5V system... right?
What the output of the sensor? If the sensor is powered by 12-24V, then output is going to be 12-24V and that will fry the AT89.
 
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