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Relay help needed

S

SFM-Ptgal

I wanna connect "ON AIR" warning lights at my Harris Stereo 80 broadcast console. Following the manual I'm told to connect 110v on the warning lights TB. But Portugal runs on 220. I can use 2 converters: one to feed the TB (220-110) and another to feed the lamps (110-220). Can I avoid this fuzz using 220v straight into the TB without making blue smoke? ::)

The relays have the following specs:
MIDTEX
RELAY
14-Tab
48 VDC
3A 28VDC 120VAC
1/10HP 120VAC 240VAC

Does the last line mean something to allow connecting 220v directly?
 
Back when these old consoles were in more common use, I would use the warning light relay to turn on another DC relay mounted safely away from the console in a utility box. That relay would then switch 110 to turn on the warning light.

With 220 I would follow the same precautions. Being the modern age, you might see if you can find a solid state relay that uses 12 volts D.C. to turn on your mains to the warning light. That way you can power the SS relay with a wall wart, and only have DC running into the console to be switched. Much safer that way.
 
Or you can get a warning light that runs off of 28 VDC. I just purchased from Grainger Industrial Supply a 28v red LED light that I use as an on air light. It also helps that the Autogram IC-10 console I'm using has a 28 volt power supply. Power supply across the relay to the light. Everything is internal.

It really wouldn't be a good idea to have 220v floating around in your console for a light.
 
The last line on the relay means the contacts are rated for 240 volts. It doesn't mean the console is. I haven't looked in one of those for a long time. Is the on-air light terminal just a contact closure? From your question, it sounds like it is. If so, then you can switch any voltage with it, up to 240. As suggested above, using a repeater relay would be a better way to go. You would have the console switch the coil voltage (3-30 VDC) and let the relay do the heavy switching. Or you could invest in a Henry Superrelay (http://www.henryeng.com/superelay.html).
 
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