mimic signal panel?

[Richard3009]

I have an old panel that produces 8 x 240v outputs to signal lamps, I wish to use these outputs to run a mimic panel a distance away, I need 110v to deal with the volt drop, but dont want 240v at the mimic, thinking of 240v relays in the master panel and running a multicore swa carrying my signals from a 110 control supply, anything on the market that will make this job easier without using radio signals.

 

[Bobster]

Well your not going to be using ordinary relays if it forms part of a safety circuit.

Normally mimics are just for display purposes.

 

[Richard3009]

its not a safety circuit as in control, but the indication has to fail to safe
[h=2][/h]ie power loss what would you see, or cable is cut shorted etc

 

[Richard3009]

ie power loss what do you see, or cable is cut shorted etc

 

[tazz]

You seemed set on using 110v instead of ultra low 5v or 12v, and using multicore. Signal switching will eliminate voltage drop, and 200m or 300m can easily be achieved using standard control cable

 

[Richard3009]

That's not a bad idea if I can fire relays at 12v over that distance, and 12v leds would be fine too

 

[Bobster]

So you need 3 guys and a 'chartered engineer' to switch a few relays and make them fail safe?

Pull the other one ffs!

 

[Richard3009]

No they are busy doing technical stuff, that's why they only check it

 

[tazz]

That's not a bad idea if I can fire relays at 12v over that distance, and 12v leds would be fine too

The idea is to switch signals which inturn switch relays, and if fail or cables are damage go in fail safe....this is the basic principle of a security alarm, switching micro Amps on a door contact, hence no worries on voltage drop, or heavy cable use

 

[Richard3009]

so if i have the 240v signals operating relays in the control panel I can then have a nice little 240/12 tx to run 12v through those relay contacts, giving me my 8 12v signals heading down my multicore which in turn can operate 8 12v relay coils in my mimic with which I can produce lots of outcomes, especially if i intoduce a backup supply locally

 

[tazz]

Your minic panel could be a basic 12v psu with 8 leds, with backup

 

[Richard3009]

some require two signals to be present before showing indication, there will be two colours interlocked only one and not the other etc, that's simple once I have my relays in the mimic with a signal to each one

 

[tazz]

Well again logic switching before the relay can be used......if this is only for indication purposes then no relays are required, on the mimic panel, just basic 30p logic 4000 series ic`s they can drive leds on there own

 

[Richard3009]

never dealt with such items

 

[tazz]

ok best way here is to post up a schmetic of what you require, then we can see if one of use can help you

 

[Richard3009]

will knock up my design tomoz