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English Support - Hardware => easy topics (general) => Thema gestartet von: Simon Tyrcha am Mai 03, 2023, 23:30:36 Nachmittag

Titel: pull up resistor with easy e-4 to utilize NPN sensors as digital input
Beitrag von: Simon Tyrcha am Mai 03, 2023, 23:30:36 Nachmittag
Is this possible? I wish to use an NPN flow sensor with an Easy E4-UC-RC1.
Thank you
Titel: Antw:pull up resistor with easy e-4 to utilize NPN sensors as digital input
Beitrag von: w.sprungmann am Mai 04, 2023, 07:33:25 Vormittag
Hi Simon,
the controller can only pnp.
otherwise use an optocoupler, see drawing

Sincerely Wilhelm
Titel: Antw:pull up resistor with easy e-4 to utilize NPN sensors as digital input
Beitrag von: Simon Tyrcha am Mai 04, 2023, 19:12:12 Nachmittag
Zitat von: w.sprungmann am Mai 04, 2023, 07:33:25 Vormittag
Hi Simon,
the controller can only pnp.
otherwise use an optocoupler, see drawing

Sincerely Wilhelm


vIELEN dANKE, Wilhelm!!!
Titel: Antw:pull up resistor with easy e-4 to utilize NPN sensors as digital input
Beitrag von: weiss_nix am Mai 06, 2023, 17:01:49 Nachmittag
... for my part I see no reason why the easy with pullup resistor and NPN transistor should not work!?! Only the input signal is inverted!
Titel: Antw:pull up resistor with easy e-4 to utilize NPN sensors as digital input
Beitrag von: Simon Tyrcha am Mai 09, 2023, 18:23:01 Nachmittag
Das ist auch wunderbar! Vielen Danke! Mein optokoppler wird mehrere tage nicht ankommen. Ich werde diesen Pullup-Widerstand ausprobieren.
Titel: Antw:pull up resistor with easy e-4 to utilize NPN sensors as digital input
Beitrag von: Simon Tyrcha am Mai 11, 2023, 18:41:50 Nachmittag
Zitat von: weiss_nix am Mai 06, 2023, 17:01:49 Nachmittag
... for my part I see no reason why the easy with pullup resistor and NPN transistor should not work!?! Only the input signal is inverted!

Es Klappt!!! Vielne Danke!
Titel: Antw:pull up resistor with easy e-4 to utilize NPN sensors as digital input
Beitrag von: weiss_nix am Mai 12, 2023, 09:08:12 Vormittag
Hello Simon,
I am very happy that my suggestion helped you! You might want to tell us which resistors you used and how your circuit is now set up!?!

Best regards
Titel: Antw:pull up resistor with easy e-4 to utilize NPN sensors as digital input
Beitrag von: Simon Tyrcha am Mai 23, 2023, 22:05:36 Nachmittag
I am using 1/2 watt 510 ohm resistor between the VCC and the input terminal. I will post pictures of the installation shortly!
Titel: Antw:pull up resistor with easy e-4 to utilize NPN sensors as digital input
Beitrag von: Simon Tyrcha am Mai 23, 2023, 23:19:41 Nachmittag
Zitat von: Simon Tyrcha am Mai 23, 2023, 22:05:36 Nachmittag
I am using 1/2 watt 510 ohm resistor between the VCC and the input terminal. I will post pictures of the installation shortly!

In the following pictures are shown the input pullup resistor I am using for the NPN flowmeter input to the EASY input 1 for the frequency counter input, and the voltage divider bridge I am using for the 4 4-20mA level sensors serving the analog inputs 5-8.

The pin-out from left to right on the breakout terminal strip is as follows:
1. the output signal from the NPN flow sensor (with resistor from the +vcc terminal #3)
2. the -12vdc to the flow sensor
3. the +12vdc to the flow sensor, and the +vcc for the level sensors; jumped to terminal #4)
4. jumped +12vdc for the remaining level sensors
5-8 are -12vdc via a resistor bridge to the feedback side of the level sensors

The resistors are 1/2 watt 510 ohm.

Please lmk if you see any problems with this. It is currently functioning; seemingly without problems.

Thank you again for your guidance!

Simon
Titel: Antw:pull up resistor with easy e-4 to utilize NPN sensors as digital input
Beitrag von: Simon Tyrcha am Mai 23, 2023, 23:20:55 Nachmittag
the assembled unit