GRM8 Electronic Latching Relay Memory Relay Impulse Relay SPDT 16A Wide Range Voltage Din Rail Mounted(GRM8-02,AC/DC12V~240V)

In my application, it works well. I have a detached home shop (numerous 8' LED lights) and I tried several motion sensors to switch my lights automatically (through a separate light contactor). I could never get the motion sensors to work consistently. I have this impulse relay (changes states at signal trigger) coupled with a photo-eye across my overhead door opening. and as I walk through, it switches the lights accordingly (immediately). I also have the lights wired through a SPDT switch so I can manually or automatically operate the lights. So far so good. For me it is not a good idea to have a motion sensor switch the lights off when operating machinery.

Works as described. It’s a very universal relay since it can use both ac & dc voltages. We purchased these relays for our push button lighting in our new house. They work exactly as we wanted them to and for a fair price.Purchased with these:ESUPPORT Car Raised Top High 19mm Momentary Stainless Metal Push Button Switch 3A/250V 2Pin Pack of 5 https://www.amazon.com/dp/B076Q9FLQ8/ref=cm_sw_r_cp_api_i_rUjeEbHJ7TPBE

First: The only reason I didn't give this 5 stars is because the gauge of wire that fits the terminals is a bit small for my application however I'm sure that is by design to reduce the size of the whole device.Second: Some people have commented about it not being a "true" latching relay. That is not an entirely accurate statement. It just works differently than older types of latching relays to accomplish the same thing.Older styles of latching relays took a signal pulse to mechanically latch and unlatch a switch.On this relay your supply A1 and A2 power the relay and it is true that if those lose power the relay is no longer latched. However, If you are using the same power as a supply to A1/A2 as what you are switching then that wont matter. The relay will work when there is power for it to switch and not when there isn't. Then with its memory, when it has power again it will return to the state it was in before power loss. This accomplishes "Latching" just not the way some people are used to.There are some benefits to this operation depending on your application and your control system but that's a longer explanation than what should be in a review.If you are thinking, "but my switching signal voltage isn't the same as the voltage being switched" use an additional simple relay with it so you can you can use what ever voltage you want to pulse a contact that would act like a switch.In my application I needed to signal the latching relay with 24vdc. So I used a 24vdc dpdt (what i had available) and put it between A1 and S on the latching relay. Then when my system pulsed the 24vdc relay, the contact to S would close momentarily switching the latch. This also provided additional circuit voltage isolation which was a bonus for my application.Even with the additional 10$ relay, this is still more cost effective than other latching relays.

Our buiilding has a lot of lighting relays because of the size and complexity of the systems. On bad spot is in the ceiling of the pastors office that required that the recessed lights be removed to access the relays. We chose this style because of the operation and type are similar to others used in the past. It worked as expected.

Well manufactured product, cross between a lighting contractor and wiring devices suited to controlling lighting a large space with multiple entry points. A single momentary switch at each entry will turn all the lights on/off or two light banks individually. Cleaver

This is a top notch relay, and works fantastic! I am using it to control an automated door or a henhouse, and has functioned flawlessly! It can be triggered, and the trigger voltage disconnected, and the relay will stay in that position, until triggered again.

A little expensive.... But works great for low voltage lighting.

I liked the slimline design and the ease of installation.