10-02-2019 09:12 AM
10-02-2019 09:15 AM
Hi.
I need to control four valves (to control the opening and closing) using digital outputs of sbRIO. Since I am new to LabVIEW I am not sure about control logic. I need to connect the motors to a solid-state relay such that knowing the time required for valve positioning we can perform this task.
Any idea on control logic along with information on LabVIEW code structure would be appreciated.
10-02-2019 10:03 AM
What relays are you using? My biggest concern is the drive current of most DIO are very small. The current needed for the relay's input may be too much for the DIO on the sbRIO. You also have to make sure the DIO and the relays are using the same logic levels (5V, 3.3V, 1.8V, 24V). So you may need some buffer circuitry.
As far as the logic, you have given no information for how the DIO are to react to anything. So I could just say "Use a button and write the value so the DIO line".
10-02-2019 12:29 PM
I have these two relays with me, which you think will be better to use?
10-02-2019 01:25 PM
Have you read the specification sheet for the motors that you are trying to control? What does it say? How does this line up for the spec sheets of the SSRs that you're proposing to use? Have you looked at any of the shipping examples? Have you gone through any of the training material at the top of this forum?
10-02-2019 01:27 PM
Solis State Relays should not have the current draw issues as they are basically just a big Triac controlled by logic levels.
There is no relay coil current draw or back EMF spikes to worry about.