The MR-CANHUBK344 sends PWM signals to the Motor controller and also to the Servo. These are standard RC Model type PWM connections.
In order to facilitate keeping the signals in the correct order they are routed and consolidated onto a single cable and small "XDHP" connector board.
It is still quite important to get the XDHP connector positioned correctly on the PWM header of the MR-CANHUBK344
Technical note: The steering servo gets +5V power from the PDB
Thw PWM/XDHP wire connection should look like as depicted in the following picture:
PWM signals wiring to MR-CANHUBK344
The cable carrying PWM signals between the MR-CANHUBK344 board, and the Power Distribution Board should look like as shown in picture below. It is a seven wire interface which carries multiple PWM signals and has a VCC line and a ground.
There is a small "XDHP" adapter board to fit on the PWM pin-header of the MR-CANHUBK344 board. This is provided in the kit and show in the image above
Please be extra careful that the XDHP adapter board is connected and aligned correctly.
Damage to the board could result from incorrect connection.
XDHP connection on PDB side
The one end of the PWM cable is connected on the XHDP pins on the PDB:
The other end of the cables having the xHDP adapter on it is mounted on the first three columns(Three pairs of three pins) of PWM pins which represents PWM0, PWM1 and PWM2 positions of the MR-CANHUBK344 respectively:
XDHP (PWM) connection on MR-CANHUBK344 side
Installation of the XDHP adapter board and cable is most easily done when the cable and connector are conected together first. Then gently bend the wires at a 90 degree angle. Push the XDHP adapter onto the CANHUBK344 pin headers.
The images show XHDP adapter is mounted on the first three columns (Three pairs of three pins) of PWM pins.
This corresponds to PWM0, PWM1 and PWM2 positions of the MR-CANHUBK344 respectively.
The XDHP aligned toward the PWM header CLOSEST to the side of the board with the CAN connectors.
Connection PDB XHDP connector to MR-CANHUBK344
XDHP Cable and small adapter board
XDHP Adapter board
Connection from CANHUB to PDB using black PWM cable
Steering Servo connection
Steering Servo PWM cable connection
This connection between the Steering servo and the PDB is pre-wired on the lower chassis but is shown here for reference.
Note that the PWM control signals are only passed through the PDB and XDHP connector and actually originate at the MR- CANHUBK344. +5V Power for the servo does get injected by the PDB though.
The image illustrates how a servo motor is connected to the PDB (Power Distribution Board). It shows three distinct wires: the red wire is +5V positive voltage supply, the brown wire is the ground connection, and the yellow wire carries the control RC-PWM signal from the microcontroller (MR-CANHUBK344).
As shown in the images, the correct orientation of the Servo wire is with the Yellow wire toward the short edge of the PDB. The Servo will NOT be damaged if this connection is reversed, it will simply fail to move.
Servo motor connection on PDB
Side showing PDB and Servo connection after removing side skirt
