I am using my K8055 board to monitor a pump running. I want to track when the pump is on and how long it is on for.
What I have working now is a AC/DC converter that put out 5V DC. That is plugged into the analog inputs and I am able to track when the pumps turn on and off. Is this an ok approach?
Assuming the above is ok, I want to expand the devices that the board is monitoring. At this point I can only add one more analog input. I want to use the digital input but am not clear on how to do it. I see a lot of talk about relays and POT’s, but I don’t think that applies to what I am doing. If someone could explain how I can use the digital inputs that would be great.
One last thing, is there a standard relay that most people use for the digital outputs?
[quote]What I have working now is a AC/DC converter that put out 5V DC. That is plugged into the analog inputs and I am able to track when the pumps turn on and off. Is this an ok approach?[/quote]This is OK.
[quote]I want to use the digital input but am not clear on how to do it. I see a lot of talk about relays and POT’s, but I don’t think that applies to what I am doing. If someone could explain how I can use the digital inputs that would be great.[/quote]At the digital inputs there are pull-up resistors to +5V. You have to pull down the digital input to get it activated. You may use either relay, push button or NPN transistor for this.
[quote]One last thing, is there a standard relay that most people use for the digital outputs?[/quote]There are several relays available depending on the use. The selection depends on what coil voltage you are using (6V, 12V, 24V). You should select a relay with coil current less than 100mA.
The relay contacts you have to select according to the voltage and current applied.
Here are two examples: velleman.eu/distributor/prod … /?id=17775 velleman.eu/distributor/prod … /?id=17770
Regarding the DC converter what is the tolerance? I have a converter that says 5.2V DC. Is this too much?
Can you explain this a bit more? What is a pull-up resistor? What what do you mean by pull down the digital input?
[quote]There are several relays available depending on the use. The selection depends on what coil voltage you are using (6V, 12V, 24V). You should select a relay with coil current less than 100mA.
The relay contacts you have to select according to the voltage and current applied.
Here are two examples: velleman.eu/distributor/prod … /?id=17775 velleman.eu/distributor/prod … /?id=17770[/quote]
I tried to use these links but I just get to a main distributor page. Can you send me the product numbers where I can search on?
[quote]Regarding the DC converter what is the tolerance? I have a converter that says 5.2V DC. Is this too much?[/quote]This is OK. There are some series resistors at the analog input to allow some amount of over voltage.
[quote]Can you explain this a bit more? What is a pull-up resistor? What what do you mean by pull down the digital input?[/quote]A pull-up resistor is a resistor between the input and +5V.
You can get the digital input “ON” by placing a switch or a closing contact of a relay between the digital input and GND. Please see the manual of the K8055 for more details.
[quote]I tried to use these links but I just get to a main distributor page. Can you send me the product numbers where I can search on?[/quote]The product numbers are: VR15M121C and VR10V121C.