key on/off linear actuator operation
Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=135235
Printed Date: May 14, 2025 at 8:02 AM
Topic: key on/off linear actuator operation
Posted By: scottyn
Subject: key on/off linear actuator operation
Date Posted: November 08, 2013 at 7:32 AM
I would like some help with powering a linear actuator to open with ignition on and closed when ignition is turned off. The actuator has internal limiting switches. Can you provide a diagram and part recommendations. The application is for a hidden license plate.
Thanks
Replies:
Posted By: scottyn
Date Posted: November 08, 2013 at 2:28 PM
Does anyone have information about using a DPDT relay to operate the linear actuator for open and close operation?
Posted By: powerslave
Date Posted: November 26, 2013 at 9:42 PM
It depends, when you say OPEN with ignition, does that mean power it on or off? We are to guess your actuator has two states, ON (state) OFF (state). That will determine your relay wiring.
IF, you need power for both OPEN and CLOSE, need to know that...
Posted By: scottyn
Date Posted: November 28, 2013 at 9:52 PM
The linear actuator has internal limit switches. Polarity is reversed to open and close the actuator. I am trying to open the actuator with key on @ accy/run and then have the actuator retract (close) when the key is turned off. Just like a power antenna functions. I have a DPDT relay but am a bit confused on the combination to wire the circuit. A drawing would be a huge help. The relay is an 8 post 2 for the coil 2 for the switching and 4 for the contacts. I appreciate any help you can give.
Posted By: Ween
Date Posted: November 29, 2013 at 5:54 PM
are the limit switches spdt...3 wires for each switch?
Posted By: scottyn
Date Posted: November 30, 2013 at 8:42 AM
I was able to figure the circuit out and it bench tested perfectly. Here is how I did it. The 1st post (coil) is 12v accy/run (key on) with the other side of coil to ground. The 2nd post on accy/run side of relay is battery constant which is positive contact at rest on 4th post for up feed (retract) of linear actuator. The 3rd post is accy/run with key/ign switched on to extend linear actuator. I used jumper grounds from post 3 and 4 accy/battery side to alternating post on ground side of relay. All post go to ground on grounded side of relay. This relay is a DPDT 12V 10 amp from Allied Electronics part # R14-11D10-12 also use 1 GT08-PC Socket for this type relay.
Summary: When relay is at rest power is supplied from terminal to the retract side of the linear actuator. When ignition is turned on the power switches over to the accy terminal and extends the linear actuator. The ground has to switch to the opposite side of either circuit when activated. The linear actuator has to have limit switches to control shut off.
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