it blows the fuse after a few uses.
Which fuse? And what's the rating of this fuse?
It should be a slow-blow type in any case.
So it's the fuse on the TRA450 that blows, not the one on the timer? Sorry my question wasn't clear
Yes, you may be right in that if the unit turns on all at once (lamp, fans etc.) it might trip the fuse. I'm kind of surprised this would happen, though, since Durst used to be pretty elaborate in their electronics engineering and it seems like a basic oversight that they didn't protect it against this contingency.
To me the only idea of feeding a timer from the TRA would be to keep wiring from a wall outlet limited.
I think the idea here is to have the timer switch the lamp relay inside the TRA450 instead of having the timer switch on the entire TRA450. There's a schematic of the thing here: https://125px.com/docs/manuals/darkroom/durst/Durst TRA450 Wiring Diagrams.pdf
but for this feature a timer would not need to be fed by the TRA.
This is correct, indeed.
Ah, I think I spotted it. I guess I've been silly for not noticing right away.
@Murdog36 you need to plug in a Euro-style power plug into the timer and the other end into the connector on the TRA450 that says 'timer input', next to the big white power output for the timer. It shouldn't matter much if you plug the timer's power cord into its own wall outlet or the TRA450's timer power output. Might as well do the latter to make the cabling less ugly, but it's inconsequential. So the red connection you drew into the photo isn't correct; it shouldn't go into the white connector on the TRA450 but the black one right next to it. Could you try this, please?
Great, I have ordered a euro cable male to male to connect the two. I’ll keep you updated
This cable you have to fabricate.
That a standard hook-up did not work
What did he try then?
And for a standard hook-up he does not need an extra cable.
He needs an extra cable for what he's going to do. There will be three cables involved:
* Wall outlet to TRA450 (Euro plug; cable present)
* Wall outlet or TRA450 'timer output' to Timer power input (hardwired to Timer, so cable present)
* Timer output to TA450 'timer input' (Euro plug; on order)
Hope this clears it up for you.
I think it explains the blown fuses alrightas the connection he draw in red already is possibly deadly
Then use a cable from the back of the TRA to the back of the Timer, which would be a male to male cable I would have to make myself. I ordered 2 plugs from Amazon. Will I blow myself up?
Yes. Or rather, you'll trip the fuse.
You need a male cable on the Timer side with female device plug on the TRA side where it goes to "timer input". It's the standard cable that connects every PC and many other devices to a wall outlet. Odds are you have one or more in a box somewhere.
As @AgX said, you NEVER make a male - male cable for power applications. That's why they aren't sold. They're not supposed to exist. Do NOT make the connection as you drew in red on the photo.
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