Centroid Community CNC Support Forum

I have purchased some of the following to use as snubbers. I am nearing the end of wiring up my Acorn 3 axis Mill and want to use the relays for various tasks. Can someone with the electronic knowledge let me if they are they suitable?

The spec given is:


“ 1. Overview
RC absorption circuit is also called RC snubber circuit, which is a circuit structure in which resistors and capacitors are connected in series and connected in parallel with switching devices. It is used to improve the voltage and current waveforms of electronic power devices when they are turned on and off.

The Elsay RC absorption circuit module can prevent the induced electromotive force generated at the moment of switching on and off of the inductive load from causing damage to the switching devices such as relays and thyristors, preventing electromagnetic interference and increasing the anti-interference ability of the microcontroller.

2. Features
1. Suitable for AC or DC 5~400V inductive loads (loads less than 1000W), protection relay contacts or thyristors.
2. RC absorption circuit absorbs the induced electromotive force of the inductive load.
3. There are varistors to prevent excessive voltage fluctuations and excessive currents from causing the relay contacts to stick.
4. Provide circuit anti-interference ability
5. Using crimp terminals to make wiring more convenient.
3.hardware introduction and description
Board size: 34.2*14.7mm

Board function description:

Instructions for use: This module is suitable for circuits containing inductive loads and switching devices (such as relays and thyristors). When in use, the two interfaces of the module are connected to the two contacts of the relay (such as the common terminal and the normally open terminal of the relay), or It is connected in parallel with the thyristor to avoid the damage of the induced electromotive force to the relay and the thyristor.” End of quote.

I have a quick question about the East app contactor I plan to order the Eaton XTCE009B10A XT-IEC Contactor which is described as a three pole contactor and reading through what Marty’s post says. One leg goes to the VFD one leg goes to the C 86,and one to the icp5 . My question is I will only have two phase power coming into my cabinet it will not be three phase so how do you get three legs of power out of the one side of the contactor without putting three legs of power in to the other side???
Or do you just jump her one of the legs into the third??

A contactor is just a group of switches actuated at the same time. What you put in on one side of the switch, you get out the other when the coil is energized.

OK so just like I said if Marty‘s asking me to power three things from the contactor I only have two power legs coming into it or do I just fork one of them and turn it into three legs??

Vwfan wrote: ↑Tue Jul 12, 2022 4:20 pm I have a quick question about the East app contactor I plan to order the Eaton XTCE009B10A XT-IEC Contactor which is described as a three pole contactor and reading through what Marty’s post says. One leg goes to the VFD one leg goes to the C 86,and one to the icp5 . My question is I will only have two phase power coming into my cabinet it will not be three phase so how do you get three legs of power out of the one side of the contactor without putting three legs of power in to the other side???
Or do you just jump her one of the legs into the third??

This could be done by using a jumper on the input side of the relay. I'm not sure if this is acceptable though. You could also feed a terminal strip on your din rail and switch all three from one set of contacts. This all depends on your power requirements and the ratings of the contacts. I'm not sure what you mean by two phase power. Power is single or 3 phase. If you are using single phase power (120V) the neutral will not be run through a switch or relay.

What's the contactor rated for? Will all three of your devices overload the contactor? You have single phase power and you can simply route the HOT leg of the devices you want to switch through the terminals on the contactor. Remember that L is the LINE side and T is the LOAD side.

OK I guess I have a bunch to figure out because I don’t really understand this I only have two legs of power coming in (220)

Vwfan wrote: ↑Wed Jul 13, 2022 7:40 am OK I guess I have a bunch to figure out because I don’t really understand this I only have two legs of power coming in (220)

Ok I thought you were using 120v because you mentioned single phase power into the box. Although 220V power has 2 lines it is also considered to be single phase power. You have to treat 120V and 240V power differently. With 120V you only need to break the hot line to turn it off or on. With 220 you should break both lines to switch it on and off. 240V power has 2 hot wires instead of 1. If you only break one line the device will turn off but you are left with a dangerous condition where a lot of things in the box will still be live. Basically in this condition if you touch something live plus anything grounded you will get a 120 volt shock. Half of 240.

Youtube has some excellent basic videos on how 120V and 240V electricity works and the difference between them. Once you see it graphically I think you will find it easy to understand.

I should have asked before I wrote this what country you are in. The way I described it is correct for here in Canada. If you are overseas somewhere I have no idea how they do it.

Yes basically everything you just explained I already know I’m asking because all the videos and everything everybody says the E stop contactor is 3 phase , it has three ins and three outs! If I need to power three things on the output side,how do I get 3 lines out of the contactor with only having 2 lines going in to it? Or do I split one of the 2 220 and make it so there are 3 going to input on contactor ?

Maybe I’m just a little confused does everybody power these control boxes off of 110 or 220 I have either available but I guess the power supplies are all 110 correct? So maybe I’m thinking about this all wrong? Maybe this is correct thinking that I’m going to power the box off of 110 and I just take my one power lead to a distribution block split it into three which will all go into the contactor and then on the other side all three will come out going to the VFD the Icp five and then the power hub 4? Is that correct