Latching and unlatching dpdt relays

[terrazza]

I have a three way momentary selector switch that I want to use that ultimately does the following.

When momentary selector is in the up position, it latches pathway "A", and unlatches pathway "B"
When momentary selector is in the down position' it unlatches pathway "A", and latches pathway "B".

I have 6 DPDT relays, and my wiring is not working. If I can figure a way to get my picture up here I will, but if any one can describe a way to do this ! I would it. Thanks

Edit: I am using 2 DPDT relays, and 2 4PDT relays.

 

[lschiavo]

I think you need 3-poles per function to do this. You can piggyback the 2-pole relays. 4 relays total should do it. I just drew a diagram with a few beers in me...it might work.

Basically, latch with one pole, kill the latch on the opposing relay with the second pole and the third pole is the load.

You would have to kill control voltage to shut both off though.

 

[EFaden]

I think you need 3-poles per function to do this. You can piggyback the 2-pole relays. 4 relays total should do it. I just drew a diagram with a few beers in me...it might work.

Basically, latch with one pole, kill the latch on the opposing relay with the second pole and the third pole is the load.

You would have to kill control voltage to shut both off though.

That Works. You could also use a multiple throw switch and two relays... I can diagram it from home if you want. Phone isn't ideal for this.

Basically a take a switch with 3 throws. Wire 1 to the first relay that has however many poles you need and the 2nd to the second relay etc. Basically the switch acts like a selector for the multipole relays. Make sense?

Edit: if you want to do it with what you have I can try to diagram it tonight. It's basically a logic problem. What are you doing with this?

 

[terrazza]

It is a bit of a logic problem.... I am using the selector switch to either select a path that uses a timer to sequences my hlt when to begin heating (in the middle of the night) or another path that overrides the relay out of the timer and allows the heating process to begin instantly while being able to use the same timer with a buzzer as simply a stop watch alarm for monitoring processes. I'll have to attach my wire diagram later today... It won't be anything elegant to look at.

 

[EFaden]

It is a bit of a logic problem.... I am using the selector switch to either select a path that uses a timer to sequences my hlt when to begin heating (in the middle of the night) or another path that overrides the relay out of the timer and allows the heating process to begin instantly while being able to use the same timer with a buzzer as simply a stop watch alarm for monitoring processes. I'll have to attach my wire diagram later today... It won't be anything elegant to look at.

Wait... I'm confused then... what are you using the 3 momentary switches and 6 relays for?

 

[terrazza]

Wait... I'm confused then... what are you using the 3 momentary switches and 6 relays for?

I am sorry, I was confused. I have a newborn baby and way too many relays running through my head... I actually have two 4PDT relays, and two 2PDT relays.

If you look at the above wiring diagram, what is trying to be done is just two things:

1st, If I select Manual, it would unlatch at any time the "Sequenced" pathway and allow the HLT to be heated by the HLT PID. In this same mode, I want to be able to use the timer as simply a "stop watch" that signals a buzzer when proceses are complete. Here is a picture of what is happening in Manual Mode, everything appears to be correct.

2nd, If "Sequenced" is selected with the 3Way Momentary Selector switch, I am trying to allow the Auberins ASL-51 timer to count down to zero when it relays out a signal that would fire up the HLT and run the HLT PID to control the HLT heating. Here is a picture of what is not happening in Sequenced mode, the timer and timer reset button don't light up, instead they only flicker on for a split second. It does however unlatch the Manual pathway from above succesfully. Hrmmm.

So, its a big control panel, but the part I'm having problem with is the upper right quadrant (near the amp meter). Take a looksy.



This is the beginning of the brewery and is what it's going to be mounted on.

 

[EFaden]

I am sorry, I was confused. I have a newborn baby and way too many relays running through my head... If you look at the above wiring diagram, what is trying to be done is just two things:
1st, If "Sequenced" is selected with the 3Way Momentary Selector switch, I am trying to allow the Auberins ASL-51 timer to count down to zero when it relays out a signal that would fire up the HLT and run the HLT PID to control the HLT heating. 2nd, If I select Manual, it would unlatch at any time the "Sequenced" pathway and allow the HLT to be heated by the HLT PID. In this same mode, I want to be able to use the timer as simply a "stop watch" that signals a buzzer when proceses are complete.

So, its a big control panel, but the part I'm having problem with is the upper right quadrant (near the amp meter). Take a looksy.



Here is what it's going on.

This seems very complex.... why not just have two lines going to a single relay. One from a "manual" switch and one from the timer output? I can diagram it if you want. It seems that you have a lot of relays and complexity for not much benefit. You could handle this without a lot of the stuff you are using.