Can I configure my Rex C100 PID to light up one of the LEDs when a temperature is reached?

[rcx135]

Hi. I'm using my Rex C100 for something off-piste. It has two configurable alarms in the settings. Is it possible to configure the the alarms so that the LEDs light up when a certain minimum temperature is reached? Ideally one would like up when temperature A is reached and the second would light up when temperature B is reached. Do I need to wire external LEDs for this (there's only one pair of terminals for Alarm 1 though), or could the LEDs on the front of the PID serve this purpose?

Thank you

 

[The-Engineer-That-Brews]

I’ve not looked at one of these units myself, but from this copy of the instructions (https://www.rkcinst.co.jp/english/downlaods/8933/imnzc22e1/) it looks like if the alarm outputs are present on your version then they should appear as normally-open relay contacts between pin 1 and pins 2 and 3:

That should make it straightforward to connect external LEDs to show when the alarms are active.
Similarly according to this diagram the alarm status should also be shown on the front panel lights:

I haven’t looked to see how the alarms themselves are configured but I presume it’s covered in that linked doc.

 

[The-Engineer-That-Brews]

Note in particular the first sentence: sounds like whether the alarms are implemented or not depends on which specific version you have.

 

[rcx135]

@The-Engineer-That-Brews thank you very much, those instructions look much better than the unreadable Chino-English ones that came with the device. Hopefully I can configure the alarm now.

 

[The-Engineer-That-Brews]

You're welcome :hat:
Hope that your model has the alarms wired up... give me a shout if you need more ideas