Wow! Thank you so much everyone! I am so very grateful and amazed at the level of detail and thought that you have all put into this!

To clarify. The first switch must be momentary and pressed once only (and the actuator's extension can't be interrupted or stopped by pressing this switch again). So in summary, press once, finger released from switch, actuator extends its full amount. I believe that is what is referred to as a 'latched' mechanism?

For the second switch, ideally I'd want to be able use it to both retract and extend the actuator. To keep it simple however, I could work with the second switch just being able to retract (and not extend the actuator). If this latter scenario is more achievable, I can work with that.

Again, thank you all so much everyone! David

 

Version #2
In this setup momentary switch Sw1 is pressed and latched at Location 1 sending power to extend the actuator.
Now at location 2 the actuator can be retracted or extended by Sw3.
Before leaving Location 2 fully retract the actuator then press Sw2 to reset RL1 removing power from Sw3.
Finally, set Sw3 back into the extend position.
System is now ready to restart.

 

Oh my @sghioto! That is incredible! Thank you! Do you have a specific recommendation for relay RL1? Thanks in advance! David

 

And I forgot to ask @sghioto, is Sw2 also a momentary switch? Thank you

 

Do you have a specific recommendation for relay RL1? Thanks in advance! David

Anyone of those 4 pin auto relays will work.


SW2 can be any momentary push button switch with contacts that are normally closed.
Sw1 and Sw2 must be rated for at least 0.25 amps.


Sw3 should be rated at 10 amps minimum.

 

Thank you @sghioto and everyone for your amazing contributions and suggestion! Very much appreciated. This place is amazing!

 

How does 12V get from location 1 to location 2?

Location 1:
SW1 has been momentarily pressed.
RL1 is latched.
Actuator has fully extended.

Location 2:
SW2 gets pressed
RL1 unlatches
Actuator gets power - how?

 

Location 2:
SW2 gets pressed
RL1 unlatches
Actuator gets power - how?

It doesn't, one would need to go back to Location 1.
Did you read post #22?

 

If we're going to use a DPDT switch, why not two? That way there's no need for a relay and the actuator can be fully operated from either location.

 

It doesn't, one would need to go back to Location 1.
Did you read post #22?

Yes, I did. I got the impression, either by statement from the TS or by my making an assumption that location 2 was away from location 1. Having to go back to L1, the TS wouldn't need L2. Not if he's going to go back and forth to operate the actuator. I think we're seeing this from two different points of view.

 

my making an assumption that location 2 was away from location 1.

Correct, the two locations are appx 10m apart per post #1.
My design is based on what the TS requested but your idea using two DPDT switches will work.
Don't know the purpose of the two locations but would assume the actuator is retracted when leaving Location 2.

 

the way i see it, operator (location 1) needs push button only. this should be momentary, with latching circuit. operator may not see the actuator.

maintenance controls (location2) need to be able to override operator control and jog actuator in either direction, any time. here no latching is required or wanted since 3500N actuator provides huge force (350kg) while mentioned load is only 2kg.

 

Correct, the two locations are appx 10m apart per post #1.
My design is based on what the TS requested but your idea using two DPDT switches will work.
Don't know the purpose of the two locations but would assume the actuator is retracted when leaving Location 2.

Guess I missed the 10M part. Sort of similar to your assumption, I imagined opening a gate or a garage door from location 1 and closing it from location 2. Then being able to open the gate or garage door from location 2. But then the problem comes when wanting to close the gate or garage door. Or whatever the TS is wanting to operate.

 

Hello again. An update and questions if I may regarding the wiring of this circuit please. I have not been successful in interpreting and implementing the circuit. In this attached image I have enclosed the area of the circuit that I'm confused about in green from Location 1.


I am using all the suggested components including the diodes, 4 pin relay (inputs = 30, 85, 86, 87),
momentary N/C switches (Sw1, Sw2) and DPDT switch. I figure that I am connecting the 4 pin relay incorrectly? Also, I'm also not sure why D1 (connected to NEG) then connects to the POS on the other side of Sw1?

Any advice on correct relay wiring in this scenario would be greatly appreciated! Thank you, David

 

I am using all the suggested components including the diodes, 4 pin relay (inputs = 30, 85, 86, 87),
momentary N/C switches (Sw1, Sw2) and DPDT switch. I figure that I am connecting the 4 pin relay incorrectly? Also, I'm also not sure why D1 (connected to NEG) then connects to the POS on the other side of Sw1?
Any advice on correct relay wiring in this scenario would be greatly appreciated! Thank you, David

Sw1 is a N/O switch only Sw2 is N/C.
D1 suppresses the EMF or flyback voltage from the relay when it is reset.
Seen below are the correct pin numbers for the relay and diode orientation.

 

Thank you @sghioto! I have re-wired the circuit and changed Sw1 to N/O and it works! Exactly as you described! I am so grateful for your expertise and patience. Thank you!