Hi Everyone I never really liked the idea of running 250W for my heated bed through my printrboard, so I just got a SSR. DC DC, 40A. Connected the controlvoltage on the relay to the Heated bed output on the printrboard- tested it without the heated bed connected, and the LED came on when I turned it on in software. Connected the load between negative on SSR and powersupply. After 10 secs I could smell something was wrong. I never got to turn on anything in software. Question: What am I doing wrong? Thanks alot! Jonas https://reprap.org/forum/read.php?4,219091,219091#msg-219091 Fri, 07 Aug 2026 11:00:21 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?4,219091,221941#msg-221941 https://reprap.org/forum/read.php?4,219091,221941#msg-221941 www.ebay.com]
it won't work with DC voltage on the output (the high voltage side). Basically it will stay close and will overheat whatever you control. These SSR's only work with AC on the high voltage side]]> ThanhTran Reprappers Thu, 27 Jun 2013 04:16:25 -0400 https://reprap.org/forum/read.php?4,219091,219605#msg-219605 https://reprap.org/forum/read.php?4,219091,219605#msg-219605

Jonas]]> jonasl Reprappers Wed, 19 Jun 2013 05:10:39 -0400 https://reprap.org/forum/read.php?4,219091,219562#msg-219562 https://reprap.org/forum/read.php?4,219091,219562#msg-219562 ThanhTran Reprappers Tue, 18 Jun 2013 23:27:31 -0400 https://reprap.org/forum/read.php?4,219091,219292#msg-219292 https://reprap.org/forum/read.php?4,219091,219292#msg-219292 nophead Reprappers Tue, 18 Jun 2013 03:09:33 -0400 https://reprap.org/forum/read.php?4,219091,219243#msg-219243 https://reprap.org/forum/read.php?4,219091,219243#msg-219243
Should it matter that I place the load between positive on PSU and positive on SSR instead of between the ground?
The datasheet says you can do both.


Jonas]]> jonasl Reprappers Mon, 17 Jun 2013 21:47:44 -0400 https://reprap.org/forum/read.php?4,219091,219177#msg-219177 https://reprap.org/forum/read.php?4,219091,219177#msg-219177
Seems like you wired it backwards.]]> nophead Reprappers Mon, 17 Jun 2013 16:22:32 -0400 https://reprap.org/forum/read.php?4,219091,219091#msg-219091 https://reprap.org/forum/read.php?4,219091,219091#msg-219091
I never really liked the idea of running 250W for my heated bed through my printrboard, so I just got a SSR. DC DC, 40A.
Connected the controlvoltage on the relay to the Heated bed output on the printrboard- tested it without the heated bed connected, and the LED came on when I turned it on in software.
Connected the load between negative on SSR and powersupply. After 10 secs I could smell something was wrong.

I never got to turn on anything in software.

Question: What am I doing wrong?



Thanks alot!

Jonas]]> jonasl Reprappers Mon, 17 Jun 2013 13:17:22 -0400