Gerardo Posted January 19 Share Posted January 19 Will Shelly uni plus trigger inputs if uni is powered by 12 or 24 VDC? In sketch included in package it shows that inputs are triggered with the -5 V wire. Quote Link to comment Share on other sites More sharing options...
Members thgoebel Posted January 19 Members Share Posted January 19 Shelly digital inputs (SWx or IN-x) are not voltage but current triggered: A small current of approximately 34μA flowing from SW-/IN-pin to GND/L activates the input. Thus, any specified voltage may be used to supply the Shelly plus UNI with energy. BTW: There is no -5V pin with UNI plus! Pins 6 („5V“) and 7 (GND) are directly connected with the smoothing capacitors. Hence, pins 6 and 7 may be used to apply DC from 5V to 32V. But be aware of the polarity! There is no diode to prevent mistakes! Quote Link to comment Share on other sites More sharing options...
Gerardo Posted January 19 Author Share Posted January 19 2 hours ago, thgoebel said: Shelly digital inputs (SWx or IN-x) are not voltage but current triggered: A small current of approximately 34μA flowing from SW-/IN-pin to GND/L activates the input. Thus, any specified voltage may be used to supply the Shelly plus UNI with energy. BTW: There is no -5V pin with UNI plus! Pins 6 („5V“) and 7 (GND) are directly connected with the smoothing capacitors. Hence, pins 6 and 7 may be used to apply DC from 5V to 32V. But be aware of the polarity! There is no diode to prevent mistakes! I do not have it very clear. According to Shelly uni plus schematic pins 6, and 7 seem to be used only for powering uni with 5V. It shows pins 1&2 for another options, that is very confusing. Quote Link to comment Share on other sites More sharing options...
Gerardo Posted January 19 Author Share Posted January 19 It is clear to me that I have to use ground to trigger inputs, but it was not very clear to me if I had to power uni with 5 v only. Quote Link to comment Share on other sites More sharing options...
Members thgoebel Posted January 19 Members Share Posted January 19 (edited) This is a partial sketch of the innards: Edited January 19 by thgoebel Quote Link to comment Share on other sites More sharing options...
Gerardo Posted January 19 Author Share Posted January 19 Thanks Quote Link to comment Share on other sites More sharing options...
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