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SSR - solid state relay for AC powered heatbed - selfmade (5€)

by toolson, published

SSR - solid state relay for AC powered heatbed - selfmade (5€) by toolson May 10, 2015

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DanielDuesentrieb

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Summary

Solid state relay (SSR) for AC powered heatbed.

If you have an high power AC heatbed you need a SSR to use it with you RAMPS or similar.

Primary power: 12 VDC or 24 VDC
Secondary power: 230 VAC up to 2A (8A with additional cooling)

Please tell me if you need other attachment brackets.

Thanks to "Hardwarekiller" from RepRapForum for the idea with that Sharp part.

One last sentence:
If you build/use this relay you are dealing with deadly voltage. Be careful!

Instructions

All you need is:

1 Set printed parts
1 Solid State Relais, Sharp S202 S02 (3,10 €)
1 Resistor 5,6k Ohm (0,30 €)
1 Clamp (4 pole) (0,40 €)
1 Fuse 2 - 3,5 A (0,08 €)
1 Fusebox (1,10 €)
1 PCB 29 x 29 mm
3 Nuts DIN 934 M3
3 Bolts DIN 912 M3x20 or similar

I bought my parts at: reichelt.de
Here are the needed part numbers:
S202 S02
MPR 5,60K
AKL 101-04
TRÄGE 3,15A
PL FPG1-40
UP 730 EP

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Wouldn't it be safer to not have the slot on the cover over the live AC connections? The lid can be removed when connecting it up.

Thanks for your reply. I just made another lid. Now you can choose.

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