Step 10.25 — PSU → Leviathan HV stepper supply¶
Step 25 of 80 · Chapter 10 — Wiring and Checkpoint #1
Parts:
- HV to MB HV cable ×1 · the Cable Kit box
Do: TO MB HV end onto the PSU's +V / −V terminals, alongside the board supply. HV end onto the Leviathan terminal silkscreened Vin 24-48V / HV-Steppers.
Check
Polarity. Both PSU-side cables share the same +V/−V pair: each ferrule fully under its screw, no strand crossing between +V and −V.
What you're looking at
Vin 24-48V / HV-Steppers is that second input, feeding only the two HV stepper drivers, the TMC5160 chips that run the A and B motors. On this build both inputs come from the same 24 V PSU; the port simply also accepts up to 48 V.
Source: LDO Rev D photo S4 mainboard/PSU wired · LDO wiring guide § Connecting 24V
