Hi. Is it possible to connect ET112 to Cerbo with 50 metre rs485 to usb cable
That should be fine assuming there is not too much noise along the way and the bus is using a proper twisted pair. One pair in a CAT5e network cable will be fine.
You will definately need to employ terminators at each end of the cable.
120 ohm at each end ?
Hi. I connected a usb to rs485 cable to cat5e over 50m then connected it to the et112. No resistors. It works perfectly. That is used for a grid meter. I also have the same connection but over 2m to connect a pv inverter also works perfectly.
hi. My connection is for ess grid meter et112 to rs485 to usb on a cerbo gx the cat 5e cable goes directly into the Et112 and a small cat 5e in-line Coupler links the wires to the rs485 to usb connection only 3 wires are connected ignoring twisted pairs as long as the colours used are the same in the et112 as connected to the rs485 cable it does not matter which colours are used. Hope this helps. Good luck
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