RUMBA32 V1.1 User Manual – Rev A
Page 7
5
MOSFET
O
UTPUTS
5.1
O
VERVIEW
RUMBA32 has six controllable outputs for driving powered loads. These outputs use low-side N-
Channel MOSFETs to switch power to the load on and off.
These outputs can be driven by PWM signals from the microcontroller if desired.
These are grouped as follows:
•
Heated Bed (HB):
o
Maximum current draw: 20A
•
Heaters (H0, H1, H2)
o
Maximum current draw: 5A
•
Fans (F0, F1)
o
Maximum current draw: 2A
HB draws power from the HB-PWR connector.
H0 and H1 draw power from the MAIN-PWR connector.
H2, F0 and F1 can be independently configured via jumper to draw power from either the MAIN-PWR
connector, or from the internal 12V regulator. Note that when drawing from the 12V regulator, the
combined current draw across H2, F0 and F1 should not exceed the rating of the 12V regulator (4A).
Figure 2: RUMBA32 MOSFET outputs (HB output not shown)
