REVO C/REVEX Service Panel Engineering Manual V1.0 Page 9
Here is the REVEX communication port for higher currents than above.
For good EMC/EMI immunity, use a Lapp RS-485 modbus communication cable that is 120ohm
impedance corrected. Use Lapp Unitronic bus LD 2x2x0.22 article number 2170204. You can
order per meter at Conrad electronic.