Hi all, first post
I have a CD101 from China, bought through ebay. It has SSR output, which is specified by model identification number, FK02-VM*AN-NN (5th digit, V=voltage pulse output=SSR, M=relay output)
The unit is not actually manufactured by RKC, but reverse-engeneered in China. But, it works very well, exept for the STOP function. Display showes "STOP" but PID still giving control output. That is a fairly known issue with the "China" version.
I also have two original RKC REX CB100, that looks exactly the same, function the same etc, exept the stop works on these. Mine had relay output, but i wired the relay drive voltage to the outputs so they can drive the SSR's directly.
SSR can certainly be wired with external powersource through the relay output. But the main difference between SSR and relay versions is that the control cycle is set for 2 sec on SSR output and 20 sec on relay output versions.
This parameter can be changed in settings and is called T in the menu system.
On a fast reacting RIMS it may be beneficial with a low value, to get fast reaction, and a relay on the output can suffer from fast switching. On a larger vessel (slow system)it should be fine with 20s control cycle or even longer.
All of my units came with a k-type innput, but all have been reconfigured for PT-100. This is simply done by changing SL1 from 0000 to 1100 in advanced menu.
For those who prefer Farenheit, change SL2 from 0000 to 0001.
If you haven't seen it:
resources:cd101 [MightyOhm Wiki]
It has a link to a more complete manual that showes how to unlock data so advanced settings can be programmed/altered.