Other PLC-optocoupler-3wire_sensor

Normaamly cınnecftion reading 24Volt(Right side) .its normal.

But .I connected Optocubler board like under below. Iam reaading A-B points 12Volt.
Why reduce voltage. This is problem for PLC.

How can i fix? What/where is problem.

I am not Elektroinc tech. Please explane simple. Thanks.

 

it looks like tou created a resistor divider. I don't have internal schematic, so I can only guess... I think the input inpedence of plc is quite low.

 

This schematic is OPTOCUPLER Board
View attachment 82904

 

Any info about plc input impedence?

 

maybe this link can help:
https://www.proface.com/support/index?page=content&country=ES&lang=es&locale=en_US&id=FA142566&prd=

 

Sorry;I think optocoubler borad.

I found now PLC

 

Short 3k resistor on output. The input impedance is high enough.

 

Thak you for support @tigrot
What could be the solution to the problem?
Where do I place resistance/diod.. etc? Can you show me the diagram above?

 

Short resistor 3K at left of diagram .

 

Which locaiton 1-2-3-4-5 for 3Kohm?

Can I use 4,7Kohm resistor for alternaitve? its now ready.

 

One more question: type of pnp sensor?

 

PNP
DC 10-30V
Sn:8mm
Ia:200ma

 

a friend told me, PLC electrical power may not be enough.
all 24v Sensors (for all input divice source is PLC output for 24V. (like Red wire)

is it possible???

 

Use an external source. The device should not sink more than 3mA at 24 V. Is sensor able to work at 24 V? I don't have any info

 

Connection 5 is X4 input of PLC?

 

Did you connect S/S pin according use? Seems quite important for input handling, according user's manual of plc.

 

sorry my late anser. (national holiday)

I tried External power source. its not changed.

Sensors : DC10...30V
Ia:200mA

 

Yes. PLC connected with X4

 

Yes. We cheked.
İts (S/S) connectted directly 24V on PLC

Thank you for Helps @tigrot

 

Hi. What happens if you disconnect 1? And 5?