eetech00, if i understand the monitor correctly, upon closing the trigger switch in the circuit, the relay that triggers REV will be energized first? Then, once the trigger is opened, the relay that triggers FWD will energize?

Yes....If FWD should be first, just swap the FWD and REV contacts.

It wasn't clear whether you needed the output contacts driving the module to be latched or momentary.

Isn't clear for the trigger contact as well.

eT

 

My version with limit switches, relays and transistors.
SG
EDIT: Schematic

 

I now recall that recently there was published a circuit that did it with just 2 magneticly latching relays. So it held the last position even if the power was off. But still, it makes much more sense to have one controller output for lock and a different one for unlock. That way the controller never gets out of synchronization, and any manual operation does not lead to confusion. You will find that the same command producing opposite effects, can be confusing and lead to making errors.

 

sghioto, in your diagram, even though the alarm will output trigger 12v for 2 seconds, is it the capacitors that will keep the circuit powered long enough for the worm gear motor to run for that 4 seconds? Also what is A and B components?

misterBill2, yes I agree having the last state in memory would be a great benefit to my project. For now i hope that the limit switches will be enough if it doesn't lose power if the deadbolt rod is stuck in the middle.

 

sghioto, in your diagram, even though the alarm will output trigger 12v for 2 seconds, is it the capacitors that will keep the circuit powered long enough for the worm gear motor to run for that 4 seconds? Also what is A and B components?

misterBill2, yes I agree having the last state in memory would be a great benefit to my project. For now i hope that the limit switches will be enough if it doesn't lose power if the deadbolt rod is stuck in the middle.

If losing power is a frequent happening in your area then a backup battery would be the solution. It would only need to support the electronics, not the deadbolt motion or the alarm bells, just to keep the electronics from having to do a reset and initialize sequence. That is the down-side of using a microcontroller, they need to reload their program.

 

Also what is A and B components?

An assumption on my part, but I believe A & B are the control coils for the relays. I'm also suspicious that components A and B are reversed (A should say B and B should say A) (but I don't know that for sure).

 

sghioto, in your diagram, even though the alarm will output trigger 12v for 2 seconds, is it the capacitors that will keep the circuit powered long enough for the worm gear motor to run for that 4 seconds? Also what is A and B components?

The A and B components are relays. The box symbols are the coils. The other symbols are the contacts of each relay.

eT

 

sghioto, in your diagram, even though the alarm will output trigger 12v for 2 seconds, is it the capacitors that will keep the circuit powered long enough for the worm gear motor to run for that 4 seconds? Also what is A and B components?

eetech00 is correct, A and B are the two DPDT relays you referred to in post #1. Transistors Q1,Q3 and Q4 are a set/reset latch circuit. This is the circuit that maintains the power to keep the relay energized when the alarm signal is gone. The 12 volts from the alarm sets the latch via Q3 and Q4, while Q1 is the reset portion triggered by the limit switches.
SG

 

Hello sghioto, Just so that I understand your circuit, I have a few questions... It looks like this circuit will require a separate 12v constant power source so now when the alarm panel triggers the 2second 12V output, it will enable Relay A and Q1, Q3, and Q4 will help keep Relay A energized long after the 2second 12V alarm trigger is gone but up until the limit switch is for Relay A activated by the deadbolt hitting it is that correct? At this point Q1, Q3 and Q4 resets and Relay A is no longer energized? At this point i have a question, what happens of the circuit's constant power is interrupted?
If i understand it correctly the since the limit switch for Relay A is engaged, the circuit will use Relay B because that limit switch is NOT engaged?
If this is the case, what happens when the deadbolt is in the middle with no limit switch engaged and constant power goes out?

BTW just wondering i know some of you have mentioned using a microcontroller of some sort. I do have an Arduino Mega a friend gave to me a while ago that I never touched. Will this to achieve with I need as well with a bit of coding? I'm thinking all i would need are the DPDT relays, some diodes, and resistors in addition to the mega?

I really appreciate everyone help thank you!

 

And some MOSFETs (or transistors and resistors) and diodes to drive the relays. The Arduino cannot drive them directly.

 

It looks like this circuit will require a separate 12v constant power source so now when the alarm panel triggers the 2second 12V output, it will enable Relay A and Q1, Q3, and Q4 will help keep Relay A energized long after the 2second 12V alarm trigger is gone but up until the limit switch is for Relay A activated by the deadbolt hitting it is that correct? At this point Q1, Q3 and Q4 resets and Relay A is no longer energized?

Correct!

If this is the case, what happens when the deadbolt is in the middle with no limit switch engaged and constant power goes out?

Well the motor stops regardless of which direction it was in at the time the power drops out.

If i understand it correctly the since the limit switch for Relay A is engaged, the circuit will use Relay B because that limit switch is NOT engaged?

Let me get back with in a while

I do have an Arduino Mega

Yes that will do it. If I was building this circuit I would use a microprocessor but it all depends on your level of experience and comfort or if help is available beyond this forum.
SG

 

At this point Q1, Q3 and Q4 resets and Relay A is no longer energized? At this point i have a question, what happens of the circuit's constant power is interrupted?

At this point nothing because the bolt is in the lock position or the same after if it has returned to the unlock position.
Any time the bolt is in motion and power is interrupted then the bolt stops until a signal from the alarm is present unless you have some kind of battery back up.
Using a micro allows the switches to be monitored in all positions. In case of a power dropout the circuit can be programmed to return to the operation before the power loss .
SG

 

EDIT: Actually a better solution to deal with a power dropout is to operate the circuit on a battery. The current draw on standby is zero and with the proper selection of relays only about 16ma.
If power is also intermittent to the motor driver then why not use a battery for the whole setup.
SG

 

Sghioto, I'm going to attempt to build your schematic diagram just to get familiar with the latching and for my own knowledge. Do you have the values for those components? Also from what I gather from your diagram, I no longer need to use my timer FWD/REV motor controller in Post #10 right?

 

Also from what I gather from your diagram, I no longer need to use my timer FWD/REV motor controller in Post #10 right?

No the circuit as is was designed using the motor controller. However I could probably add to the design and eliminate the controller if you can get me some specs on the motor or a link.
SG

 

Hello sghioto, I appreciate all the help! the motor i have is a DC12V Rated Current 1.6A reversible 35RPM DC work gear motor. Similar to this one sold by Amazon:
https://www.amazon.com/BEMONOC-DC-Torque-Geared-Replacement/dp/B01D80FS8C

 

I came across this interesting item on Amazon as well a latching dpdt relay module:
https://www.amazon.com/ELECTRONICS-...=1&refRID=N7AJYWHRW4X5HBZRJVZH#detail-bullets

 

I believe that the DPDT module will work but a few mods maybe required from the alarm signal and limit switches. I'll check into it later.
SG

 

After review it is apparent that both the DPDT Relay module and the Motor Controller with Timer would require external circuitry. I think it would be easier to build the complete circuit as one unit. Advantages are physical size and zero power consumption when in the standby mode. Power should be available from the alarm panel. I have upgraded the schematic using two DPDT relays for motor control and simpler construction.
SG

 

The circuit in post #39 should provide the function that the TS needs. If two outputs had been available it could have been a lot simpler. But 2 outputs were not presented as being available.