Remote/Wireless Switching NVR

[mindthatwhatouch]

Hi,
Has anyone come across a remote control relay (preferably 240V to keep it simple) that has more than one contact.
Most seem to be just a simple on or off, and I need a normally closed contact for the stop switch and a normally open for the start to remote control an NVR.
I could come up with something using a couple of latching relays, but feel that's complicating things more than necessary.

 

[Mhop74]

I've used an earlier model of this: LightwaveRF Smart Mini Relay which has Open/Stop/Close positions.

Like many similar smart ecosystems the challenge is that getting started is relatively expensive as they all need their own hub.

 

[Spectric]

Why not use a DOL starter? Make sure it has 230 Vac coil and not a 400 Vac one. If you want complete remote control then look at this Remote Controlled Switch Box IP66 - 3 Gang

 

[Jelly]

240v Non Latching Relay, 2 Pole, SP-NO/NC - £31.85 from RS Components

That said, it's probably more expensive to buy that relay, than the total cost to buy the appropriate pair of single pole relays one NO and one NC, wire them together and stick them on a little off-cut of DIN rail in a cheap plastic enclosure.

Edit: Also, what @Spectric said. You can wire additional remote start or stop buttons into a DOL easily enough if needs be.

 

[Spectric]

Edit: Also, what @Spectric said. You can wire additional remote start or stop buttons into a DOL easily enough if needs be.

When buying a DOL buy a brand that allows you to attach auxilary contacts, not all of them have this ability.

 

[mindthatwhatouch]

Sorry I wasn't clear.
There is already a DOL starter, what I want to do is save me going to the button each time I want the extractor on or off.
I can easily wire in another start stop button, but that would be fixed position also so figured a remote key fob type thing would be easier. Thought it would be easy to find one this day and age, I'm fine with mains electrics, but the last time I played with any electronics was about 20 years ago....

Like this but with a couple of relays rather than the simple on/off.
240V relay

No Internet in the workshop so Smart system isn't an option I'm afraid.

 

[jrm688]

I bought a 2 channel wireless relay board with 3 remotes from eBay (~CDN$20). It runs on 85V-250V, has 2 relays (10A @ 250V) both with NC & NO contacts. I wired it up to the magnetic contactor on the dust collector and it works great. The only problem was a blown input resistor which was easily replaced with a higher power one.

 

[mindthatwhatouch]

That’s what I need jrm688!

 

[mindthatwhatouch]

Not sure why it took me so many searches to find the right thing.

 

[mindthatwhatouch]

As I saw on another thread, Dust Collector Remote Switch for 16A Extractor several people having similar needs thought this may prove useful.
Please do not attempt this unless you are happy with some wiring, Switch off before starting, you are responsible for your own safety, not me. Also, see note below about fusing.

QIACHIP 2 channel remote as posted above, mount in a suitable enclosure, I used a double socket mattress box and blanking lid. Mounted somewhere sensible, not sure if it would work in a metal box.



Relay A is used to remote start, so you push the 'A' button the relay switches the contactor on and it latches, Relay B for remote stop, (push B and the contactor drops out, both relays in momentary mode. The relays are just switching the starter contactor and NOT the motor, so could use this for larger loads than the relays are rated for. If you use the relays to directly switch the load make sure they can handle it and consider what sort of protection is in place. I wished to keep the DOL starter as it has overload protection and didn't want the relay to be handling motor starter currents, and be permanently energised whilst the extractor is running. Apart from anything else you'll struggle to get a larger cable in the terminals of the controller.
Controls on front of the DOL starter also continue to work. (which is handy cos I always seem to leave the remote at the other side of the workshop!)

Excuse the crude drawing.
Relay A is in parallel with the start button on the DOL starter, Grey and black wires.
Relay B is in series with the stop button, blue and brown wires, you are replacing the red wire in the first diagram with the normally closed contact of relay B. (yes I know I could have used less cores, but wasn't 100% on the way the controller worked)

Bear in mind that your starter labelling maybe different (it used to be a standard configuration, but I've been out of the industry for a while now)





Optional fuse: If you take 240V power to the controller from the DOL starter whatever is protecting the starter also protects the small cabling that you have put in and the controller circuit board. If your machine is on a 16 amp (or larger) plug and socket, then please put an inline fuse (or feed the the controller from a plug top with an appropriately sized fuse (suggest 3 or 5 amp)

Hope that helps, and makes sense, any questions then please ask.

 

[fergusmacdonald]

Thank you so much for posting this. It feels a little over my head but I'm going to have a look at the switch and see if I can figure it out. Thanks.