Boxford 165 HMC

[JAZZCNC]

No all the front switches are not connected the only working switch is the estop but that only knocks off the enable contactor but now I need to include the CS labs into the estop circuit BUT the estop on the machine is 240v which I think would not be ok for the CS labs estop terminals!
i still need to work that one out,

Chris does the Contactor have a NO Aux Contact.? or a Spare contact you can use.? If so then it's simple case of running 0v wire from 24V supply thru this Contact and back to Input (-) on IP-S. Then take (+) from 24V supply to the Input (+).
Now when E-stop occurs and Contactor drops it informs the Controller of the E-stop. It's that simple.!

is the "direct connection" between CS labs to isolation board going to be a problem because of load on the CS unit??
soooo many questions,

If your talking about the 0-10v Ref signal then provided the Lenze is Isolated from Mains Voltage then you won't have any problems.


You say you don't under stand Relays so let me explain they are very simple really. Relay is basicly just switch or number of switches that are turned on/off by electricity.
There is a electromagnetic coil which is connected to the switch or switches, buts lets call them by there proper name Contacts.
Each Contact can be in one of two states when NO power is applied. NO or NC meaning Normally Open or Normally Closed.
When power is applied to the relay Coil each switch Flips state. So NO contact becomes CLOSED and NC becomes OPEN.

The # of contacts on relay are often refered to has POLES when buying so for instance 4PDT or 2PST. 4PDT translates to 4 x sets of contacts that each have 2 states OPEN or CLOSED. DT standing for Double throw.
This means for each contact there are 3 connections. COM, NC & NO. An example of how you would use this type of relay is say for when in E-stop condition you wanted to inform the Control about E-stop and at same time turn on an Alarm light.

So you would run say 24V to the COM connection. Then run a wire from the NO connection to the Controller E-stop (+) INPUT. Take another wire From the NC connection to the (+) side of the Alarm Light.
Now run Power thru your E-stop Button/s to the Relay COILS. This power could be the Same 24V running thru Contacts or any other voltage that matches the COILS rating. ie 5V or 240V

So now When E-stop is Safe ie Not pushed and power is running thru the E-stop circuit the relay turns on. This Flips the Switch states NO becomes Closed and lets power flow to the Controller INPUT informing E-stop is safe. At the same time the NC flips states and Removes power from the Alarm light which turns off.
Hit the E-stop button and contacts flip state. Alarm light see power and lights up and controller see's the INPUT change so E-stops the system.

Now obviously you could have more contacts and have it do all sorts of things like turn Kettle on because the Job is Stuffed and you need a Brew to Chill. . Lol

Relays also come in ST flavors meaning Single Throw. So each Contact only has 2 terminals COM and one State NC or NO.

Hopefully you get the picture and it's clear.

Oh and Contactor is just a Relay with Contacts that handle Higher power.



It's that simple really and in practise you decide which Contact State to use and number needed to do the Job.