I am trying to read GPIO pins on the Fusion 1-Channel SPDT Relay Controller and the result is always showing a 1 for each channel with nothing connected

Hardware
1

I am trying to read the status of the GPIO pins in the Fusion 1-Channel SPDT Relay Controller using the base station software. I am able to connect successfully over RS485 and talk to the device in base station. However everytime I try to do a read of the pins they are all returning a 1 when I have nothing connected. I tried to put 5 V on one of the GPIO lines to see if it would flip to a 0 to see if maybe the system was active low but everything stayed a 1 no matter what I did. All pins were set to input and everything was grounded properly. It did say something about making sure the pins were not being used for reactor, but I couldn’t figure out how to check that. I checked several places but the settings were not clear. How do I properly read the pins using the base station software?

2

Hi,

Are you using this AD GPIO board for Fusion?

If not you will need that to use the GPIOs as inputs.

3

Okay we are not using that so that explains it. For clarity, we don’t have to use that to use the output of the GPIO right?

4

That’s correct, but you cannot mix the pins. They are either all outputs or all inputs.

5

Okay cool. That’s good to know. Fortunately, we are using two of these devices one for input one for output so we should be good.