Reprap Ramps 1.4 RRD Fan Extender Expansion Module

With this expansion module additional fans can be connected to the Ramps 1.4 board and controlled. This is especially handy for dual extruder setups.

If the dual extruder with heating bed is used, all output connectors (D8, D9, D10) are used. In this case the firmware controlled fan cannot be connected directly to the RAMPS board. However, there is already an option in the Sprinter/Marlin firmware (Marlin: BOARD = 34) to redirect the fan to RAMPS output D4. But this solution requires a "buffer/driver" to work. This expansion module is the appropriate solution and allows easy installation of the FAN setting for dual extruders with RAMPS1.4 through plug-and-play. Instead of adding only one output port, the module is equipped with two PWM control channels (D6 / D11). 

Overview:

• Max. 20 V
• 2 channels (D6 / D11), PWM controllable
• Maximum 0.5 A per channel (sufficient for large fans)
• flexible output voltage (can be connected to 12 V, 5 V etc.)
• Each channel has a flyback diode
• The second channel can be used for another fan (e.g. to cool a stepper drive) or for light control (e.g. to add a dimmable LED to your machine). 
• easy to set up (plug and play)
• supports Marlin firmware (select #define MOTHERBOARD 34)
• easy to adapt to other firmware 
• Dimensions: 

Scope of delivery:

• 1x 3D printer Reprap Ramps 1.4 RRD fan expansion module