Hello all,
I am planning to purchase the EVLSERVO1 to control an industrial three-phase PMSM servo motor (rated 220V AC) for a hobby project. I will be running it at a lower voltage and accept the speed loss.
The motor has a 17-bit absolute encoder using RS485 physical layer (protocol is currently unknown, likely proprietary, which I plan to reverse engineer).
The EVLSERVO1 manual states: "The 120 Ohm termination resistors R84/R85 must be removed if termination is embedded at encoder side." My encoder has a built-in 100 Ohm termination resistor.
While I understand the manual's instruction to prevent double termination, I would prefer not to modify a new board if possible.
If I leave the resistors on the board, the parallel combination results in a ~54.5 Ohm load. Given that I plan to use a short cable (< 1 meter), is the EVLSERVO1's transceiver robust enough to drive this lower impedance without signal collapse? Or is the "must remove" warning critical because the board uses 3.3V logic and cannot source enough current for ~54 Ohms?
Any advice is appreciated!
