PLC Output stage Design With Seperate Ground

dcbingaman

Joined Jun 30, 2021
1,065
Several of these posts belong in a different thread. #33,#34,#37, and probably #35.
Or am I the only one seeing this???
Your not the only one seeing this. I am seeing it as well. The one thread shows a picture of the device and shows the 4 relays I have been referring to. But I'm not certain it is this one. I think it is.
Unless I missed something, this goal of 4 SPDT relays is your own goal and TS never said anything like it. I have been puzzled as to why you have been in such dogged pursuit of it.
He did not say it but there 'was' a picture showing the board with 4 SPDT relays. For some reason the TS either created two threads talking about the same thing or he deleted this picture on his second thread.
 

strantor

Joined Oct 3, 2010
6,875
I understand where you are coming from but the TS did provide this information. If you look closely at the board, there is 4 SPDT relays and each relays is labeled with a common connection and text stating 'OFF' for the NO contact and "ON' for the normally closed contact. Which also implies the coils providing power to those relays is coming from the board. That is not a surprise to me. He also provided a table with 3 devices having 3 states (Charging, On, and Off).
Your not the only one seeing this. I am seeing it as well. The one thread shows a picture of the device and shows the 4 relays I have been referring to. But I'm not certain it is this one. I think it is.

He did not say it but there 'was' a picture showing the board with 4 SPDT relays. For some reason the TS either created two threads talking about the same thing or he deleted this picture on his second thread.
This is odd indeed because none of the TS posts show any timestamp for editing and I was watching this thread on the 26th and 27th when you were posting about relays and state tables and I noted that TS had not logged in since the 25th. I remember it clearly because I had no idea what you were going on about but rather than drag the thread further into the weeds (ref: conversion about "what is a PLC") so I was about to post "guys this is a hit & run, we are probably wasting our time and TS isn't coming back." But before doing so I checked his profile and saw that he did have a few prior posts so maybe not a "one hit wonder" after all, so I withheld my comment and just let it go.

So if TS had posted these images and then deleted them, you would have been referring to images that had already been deleted 2 days prior to you addressing them.

Are you sure you didn't get two similar threads mixed up?
 

dcbingaman

Joined Jun 30, 2021
1,065
BTW, what is it intended to switch and also the voltage level? AC? DC?
Good question. I was under the impression it is 120VAC from a power outlet going to 3 devices, with the neutral (white) wire going to the 4 commons of the 4 SPDT relays and the hot wires (black) going to any combination of the NO and NC contacts of the 4 SPDT relays. But why in that case would you need a charge state? So it sounds like they are battery operated being you need a charge state. Thus supporting the idea that it is DC with the ground side of the DC going to the 4 SPDT relays. But if that is true then you need an external battery for the system. I am thinking it is 120VAC with 3 devices having 'somehow'? a charge state along with the more obvious on and off states.
 

dcbingaman

Joined Jun 30, 2021
1,065
Your not the only one seeing this. I am seeing it as well. The one thread shows a picture of the device and shows the 4 relays I have been referring to. But I'm not certain it is this one. I think it is.

He did not say it but there 'was' a picture showing the board with 4 SPDT relays. For some reason the TS either created two threads talking about the same thing or he deleted this picture on his second thread.
That sounds very logical, I agree with you.
 
Top