BTT Octopus Max EZ

BIGTREETECH Octopus MAX EZ V1.0 is a 32-bit 3D-printer control board for large Klipper or Marlin builds that need ten EZ driver channels, CAN, protected thermistor inputs, and flexible fan power. It is the upgraded Octopus-family board built around a 550 MHz STM32H723ZET6 ARM Cortex-M7 MCU, with pinless EZ driver sockets and onboard UART/SPI driver configuration. Why this board over a standard Octopus 10 EZ driver sockets for high-axis-count CoreXY, toolchanger, multi-extruder, or large-format builds. Firmware-set UART/SPI for compatible BIGTREETECH EZ drivers — no driver-mode jumper maze. Board protection where mistakes happen: eFuse protection, protected thermistor circuits, replaceable fuse, and selectable 5V/12V/24V CNC fan voltage. Klipper-friendly expansion: CAN, SPI for accelerometer/input shaping, BLTouch/probe, RGB, filament sensor, PS-ON, TFT, and MINI12864 display headers. Specifications Model: BIGTREETECH Octopus MAX EZ V1.0 MCU: STM32H723ZET6, 32-bit ARM Cortex-M7 at 550 MHz Board size: 160 × 100 mm Input voltage: motherboard VIN 12V or 24V DC; heated bed input 12V or 24V DC Driver power: selectable 24V / HV up to 56V Stepper channels: 10 EZ driver sockets; UART/SPI driver modes Heaters: heated bed plus HE0, HE1, HE2, HE3 cartridge outputs Thermistors: 5× 100K NTC inputs; four channels selectable for PT1000 use Fans: FAN0–FAN3 2-wire CNC, FAN4–FAN6 4-wire CNC, plus 2× always-on 24V fan ports Firmware: Klipper or Marlin; firmware update by SD card or DFU PC interface: USB Type-C Fitment and pairing Good fit for Voron, VZBot, large CoreXY, Cartesian, Delta, Kossel, Ultimaker-style, multi-extruder, and toolchanger projects that need more driver outputs than a smaller controller. Use EZ-format drivers such as the BTT EZ2209 Stepper Motor Driver for standard UART stepper channels or the BTT EZ5160 PRO Stepper Motor Driver when you need high-voltage SPI driver capability. Works well with a BTT MINI12864 V2.0 when you want a local screen. For CAN toolhead builds, pair the controller with a live toolhead board such as the EBB36 CAN Toolhead Board; the U2C CAN Interface Board is useful when you want a separate USB-to-CAN adapter. Gotchas EZ drivers are not included. This board uses BIGTREETECH EZ-format pinless drivers; standard StepStick-style drivers are not the intended socket format. Check the fan-voltage jumpers before powering fans. The board supports 5V, 12V, and 24V fan rails, but the wrong jumper can kill the fan. The PT1000 jumper method is convenient, but BTT notes it is less accurate than a dedicated MAX31865-style RTD interface.