IMPORTANT: it is CRUCIAL to connect the PSU and HB cables in correct order to the EINSY board. POSITIVE WIRE must be connected to POSITIVE SLOT. There are TWO VERSIONS of the cables with different coloring system:
⬢Version A: both wires on each pair are black, POSITIVE WIRE is marked with a RED LINE
⬢Version B: on each pair, there is a red and black wire. POSITIVE WIRE is FULLY RED.
⬢Connect wires from PSU and HEATBED to the EINSY board in the following order (red arrows indicate positive slot):
⬢The first cable from the PSU (A+|A-).
⬢The second cable from the PSU (B+|B-).
⬢Cable from the heatbed (C+|C-).
Both cables (two pairs) from the PSU are the same, their order doesn't matter, just ensure correct polarity.