Specification Power Supplies

[luhrern]

I have several Z-uno's - version 1 & version 2.

With regards to teh power supply I us 24 voltage for all units. For one unit I have a power supply 24 volt and 5 ampere. This seesm to be a bit overkill. Whar ampere is sufficiant for teh Z-uno's - for 24 volt and 12 volt power supply ?

[lanbrown]

Z-Uno v1 and V2 specs can be found here:
https://z-uno.z-wave.me/technical/

In the upper right you can select V1 or V2. Most things are common between them

Power modes:
USB 5 V, external 5 or 3 V, external 7-18 V or battery (via MU-2F connector, included)
always on, sleeping or FLiRS (Frequently Listening)

Power consumption on 3.3 V:
in always listening mode 7 mA
in sleep mode EM4 9 μA (about 1 μA if DC-DC is turned off by unsoldering R12)
Power consumption on 5 V: in always listening mode ∼ 13 mA (can be lowered by using external switching DC-DC)
Power consumption on 7–18 V: in always listening mode ∼ 10 mA (can be lowered by using external switching DC-DC)
DC-DC installed:
7–18 V → 5 V: NCP1117ST50T3G, max current sourcing from 5V pin 400 mA
5 V → 3 V: MCP1700, max current sourcing from 3V pin 150 mA

Remember that you can power them via USB. USB is 5V and 500mA. Yes, newer version of USB have higher voltage and Amp capacity.