Basic wiring in series query

[beattsmjk]

Hi,

I have a panel with a series of relay outputs on it (see photo).

I want to create a closed contact across two terminals(away from this panel) for arguments sake let me call them terminals 1 and 2, a bridge is created when relays R0 and R7 are closed.

R7 is currently disabled in the panel, I need to re-enable this via the operating parameters.



I know this may seem a little simple to some, but my knowledge of electronics is not great, I assume in order to achieve this I add a wire to #55 in the panel nd then take this to my conact number #1 (on the sketch), and also take a wire from #54 to #41 on the panel and then a wire from #40 to my #2 (on the sketch)

would this work?
any advice would be greatly received.

 

[waross]

It may bypass the R0 and R7 contacts but without knowing the external circuitry there is no way of knowing if connecting #54 to #41 will be safe.
And mentioning safety, without knowing the function of R0 and R7, we have no way of knowing if jumpering these relays may disable a critical safety function.
Better call an expert with knowledge of this machine.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[beattsmjk]

ok,

A little more info. This is all based in a bakery.

I have a liquid yeast batching panel that needs to receive a momentry contact to tell it to commence batching.

I spoke with the machinary manufacturers of the panel in the photograph (Siloba) who informed me of the following.

The Siloba panel controls a mixer and a flour hopper / weigher.

Relay R0 is the relay used to communicate from the Panel to the mixer that the flour has finihsed being dosed. It remains closed until the signal is reset when another mix is called for.

I could use R0 as the momentry call but it would be on too long and I want a call to last no more than a few seconds (I will explain more about this further down).

Therefore the panel can also utilise an empty level relay. This is R7. When enabled, if the flour from the hopper falls below say 1Kg and R0 is closed then a signal is sent for 10 seconds to say 'hopper empty'.

Normally R7 is not in use because it is quite obvious generally if the hopper is empty.

R7 provides a brief signal that I could incorporate into my panel. I do not want a long signal becuase the yeast panel is quite susceptible to interference and therefore as long as the contact is closed a spike could potentially send another signal requesting yeast which I do not want to happen.

I will not be disabling R0, merely piggy backing it, but wasnt too sure how to wire up to provide my two contact wires.


thanks, I hope this makes it a little clearer.

 

[JohnWaa]

R7 provides a brief signal that I could incorporate into my panel. I do not want a long signal becuase the yeast panel is quite susceptible to interference and therefore as long as the contact is closed a spike could potentially send another signal requesting yeast which I do not want to happen.

It looks like R7 isn't being used. And you can program it to provide that signal that you want? Great!

Making some general assumptions here (that the yeast batching equipment that you are connecting to is off of the same control system).

Yes, you could take a wire from terminal #55 (actually, I would use terminal #49 since it is the same wire as what is on terminal #55 according to the picture), and tie that to Terminal #41.

Then take a wire from terminal #40 to the yeast batching equipment (hereafter known as the "YBE").

However...

If the YBE panel isn't part of the same control system, or at the same voltage as what the Siloba uses, or if it just wants to see a set of contacts close rather than have an input go "high" when R7 closes you will want to bring the wires from the YBE to terminals 40 & 41 (and not hook anything up to terminal #55 or anywhere else for that matter). This will keep the signal isolated from the Siloba equipment.

Without knowing anything about the YBE, I couldn't say for sure if the N.O. contacts on the Siloba equipment will do the job.

Worst case is that you would need to add a control relay. no big deal.

Post something on the YBE and we can nail it down for you.