EN
Login- Čeština
- Italiano
- Deutsch
- Polski
- Français
- Home
- About your printer
- Printer description
- Accessory connectors (MK4)
Accessory connectors (MK4)
Menu
- Printer description
- 360 viewer
- Accessory connectors (MK4)
- xBuddy
- xLCD
- Combining materials (XL)
- CW1/S - Basic use and LCD-menu
- Einsy RAMBo electronics wiring (MK3/MK3S/MK3S+)
- Experimental menu (MK3/S/+)
- Flashing custom firmware MINI
- How to check your Buddy board version
- LCD menu (MINI/MINI+)
- LCD menu (MK4)
- LCD menu (Original Prusa i3)
- LCD menu (XL Multi Tool)
- LCD menu (XL Single Tool)
- LCD menu i3 (pre firmware 3.9.0)
- Mini RAMBo electronics wiring (MK2S, MK2.5, MK2.5S)
- Original Prusa SL1 vs. SL1S Speed
- PrusA64 mainboard electronics wiring (SL1)
- Registers MMU (MMU3)
- Spool placement
- Top-bar Notifications (SL1/SL1S)
- Tune menu (XL)
- USB not detected (MINI/MINI+)
- Using the CW1 - Drying and Curing
- Using the CW1 - Washing
- xBuddy and LoveBoard electronics wiring (MK4)
- xBuddy status LEDs (MK4, MK3.9)
- Printer features
- General Information
Relevant for:
Last updated 6 months agoThis article is also available in following languages: 
This article describes connectors on the Original Prusa MK4, which can be used to connect your own or any 3rd party accessory.
Warning: Keep in mind the maximum allowable electric current (I) and voltage (V) limits. Failure to do so may result in permanent damage to the board. This article is intended for experienced users only!
xBuddy
| Connector | Pin | Type | Function | GPIO | Limitations |
|---|---|---|---|---|---|
| J29 (ACCELEROMETER) |
1 | open drain output | SPI2 CS | PA10 | max 3.3V/5mA |
| J29 (ACCELEROMETER) | 2 | input/output | SPI2 SCL | PB10 | max 5V/5mA |
| J29 (ACCELEROMETER) | 3 | input/output | SPI2 SDI | PC3 | max 5V/5mA |
| J29 (ACCELEROMETER) | 4 | input/output | SPI2 SDO | PC2 | max 5V/5mA |
| J29 (ACCELEROMETER) | 5 | 3V3 | POWER | X | max 50mA |
| J29 (ACCELEROMETER) | 6 | GND | POWER | X | - |
| J23 (I2C) | 1 | input/output | I2C2 SCL | PF1 | max 5V/5mA |
| J23 (I2C) | 2 | input/output | I2C2 SDA | PF0 | max 5V/5mA |
| J23 (I2C) | 3 | 3V3 | POWER | X | max 50mA |
| J23 (I2C) | 4 | GND | POWER | X | - |
| J15(A_TEMP) | 1 | analog input | THERM 3 | PF5 | max 3.3V |
| J15(A_TEMP) | 2 | GND | POWER | X | - |
| J6 (MMU) | 1 | input/output | USART6 TX | PC6 | max 5V/5mA |
| J6 (MMU) | 2 | RS485- | USART6 | X | max 3.3V/250mA |
| J6 (MMU) | 3 | input/output | USART6 RX | PC7 | max 5V/5mA |
| J6 (MMU) | 4 | RS485+ | USART6 | X | max 3.3V/250mA |
| J6 (MMU) | 5 | MMU 5V (switchable) | POWER | PG2 | max 5V/0.5A |
| J6 (MMU) | 6 | open drain output | MMU RESET | PG8 | max 5V/5mA |
| J6 (MMU) | 7 | GND | POWER | X | - |
| J6 (MMU) | 8 | output | nAC FAULT | X | max 3.3V/5mA |
| J6 (MMU) | 9 | GND | POWER | X | - |
| J6 (MMU) | 10 | MMU 24V (switchable) | POWER | PG2 | max 24V/3.6A |
| J6 (MMU) | 11 | GND | POWER | X | - |
| J6 (MMU) | 12 | MMU 24V (switchable) | POWER | PG2 | max 24V/3.6A |
xLCD
| Connector | Pin | Type | Function | GPIO | Limitations |
|---|---|---|---|---|---|
| P11 | 1 | 3.3V | POWER | - | max 3.3V/50mA |
| P11 | 2 | open drain output | LCD 1wire | PD11 | max 5V/18.5mA |
| P11 | 3 | input/output | I2C3 SCL | PA8 | max 3.3V/5mA |
| P11 | 4 | input/output | I2C3 SDA | PC9 | max 3.3V/5mA |
| P11 | 5 | GND | POWER | X | - |
| P11 | 6 | 5V | POWER | X | max 5V/100mA |
Was this article helpful?
Comments
Still have questions?
If you have a question about something that isn't covered here, check out our additional resources.
And if that doesn't do the trick, you can send an inquiry to [email protected] or through the button below.