phloaw
Newbie level 3
I'd like to use this usb device:
https://www.aliexpress.com/item/32956365824.html?spm=a2g0s.8937460.0.0.64552e0ezng2GS
to control 220-240V/AC appliances, drawing around 5A. Specifically, to control my central heating unit, which is not programmable itself.
The device seems easy to program and to wire, however, I am concerned because I found this warning:
"The USB specification has clearly provided guidelines as to how power should be utilized from the USB port, and surging currents produced by high-current mechanical relays is strictly prohibited."
(https://ncd.io/choosing-the-right-usb-relay-controller/#document-5)
I am wondering whether that warning applies to the device above (whose relay's specs can be found here: https://www.circuitbasics.com/wp-content/uploads/2015/11/SRD-05VDC-SL-C-Datasheet.pdf).
Thanks!
https://www.aliexpress.com/item/32956365824.html?spm=a2g0s.8937460.0.0.64552e0ezng2GS
to control 220-240V/AC appliances, drawing around 5A. Specifically, to control my central heating unit, which is not programmable itself.
The device seems easy to program and to wire, however, I am concerned because I found this warning:
"The USB specification has clearly provided guidelines as to how power should be utilized from the USB port, and surging currents produced by high-current mechanical relays is strictly prohibited."
(https://ncd.io/choosing-the-right-usb-relay-controller/#document-5)
I am wondering whether that warning applies to the device above (whose relay's specs can be found here: https://www.circuitbasics.com/wp-content/uploads/2015/11/SRD-05VDC-SL-C-Datasheet.pdf).
Thanks!