I have an Elite Foreman coming and I am looking to build a control panel with some buttons tied to inputs on the Masso for Home, Park ect. Does anyone have a simple diagram to the wiring of a switch for one of the inputs? I see in some places that resistors are needed in line between the switch and the input on the Masso. The Masso site shows wiring in pullup resistors but it also states it has switches for built in pullup resistors.
Masso also shows a diagram on their list of programmable inputs which shows directly from +ve to the switch to the input.
I only ordered my machine last night but have been reading and researching then for months so take this with an appropriate measure of salt, but…
The install and setup for the EZ button attachment may be of help to you. There are also a few good videos out there of users installing theirs.
From what I saw I feel like i could print, assemble, and set up hard buttons from scratch myself.
Ive watched that before and I guess my question is why does the eZ button which is a known good product use a resistor when Masso and Onefinity both have documentation showing no resistor?
I tried drawing out what I believe is the eZ wiring compared to a snip from Masso’s website and a snip from Onefinity support on testing an input just for clarification about what is the right way to go about making my own button setup.
In the Masso diagram (top), the input is normally low, and will go high when the switch is closed.
In the middle diagram, the input is normally high, and will go low when the switch is closed. The 5.6k resistor is a current-limiting resistor. Without it, the switch would short-circuit the power supply to ground when closed (which should either blow a fuse or cause the power supply to “fold back” to a very low output voltage).
Either circuit will work, and you can invert the inputs from the Masso setup screen if necessary.
The best design practice is to choose is to choose the electrical signal polarity that is most fail-safe. The most likely failure modes are:
A short circuit from the signal wire to ground. In this case, either circuit will cause the input to go low.
A broken signal wire. In this case, the input will go low on the top circuit, but will go high on the bottom circuit.
So ideally, you should choose the circuit such that the action resulting from these failure modes is the safer of the two possibilities. This depends entirely on what you are using the input for.
Thank you, that helps a lot. I think the normally low options would work better for my applications and makes it simpler to wire as I don’t have to worry about the resistor.
Thanks for posting this. It helped me figure out mine as well. I could not figure out why there was a resistor! After reading your post it all makes sense!
