Lebai Help

How to Convert Control Box to DC Power Supply (48VDC/24VDC)

Applicable Products

Lebai Robot LM3open in new window, Lebai Robot LM3-L1open in new window.

Since the control box's standard power interface is 220VAC, but some customers' operating environment requires 48VDC or 24VDC input. Here "control box" refers to the large control box. The following are specific methods for control box modification.

Power Interface Conversion to 48VDC

  1. Remove the switch power supply from the control box, remove the power cable from the switch power supply to the communication board, and remove the 220V power socket from the control box. A total of three components: switch power supply, power input cable, and power output cable. The actual products are shown below:

    step1-1

  2. Replace the power socket with a 3PIN aviation socket. The mounting plate needs 3D printing. Click 24V Adapter Board.stp to download the 3D printing file. The power cable is approximately 1 meter long (red wire: 48V, blue wire: ground, yellow wire: reserved for earth ground). A total of three components, as shown below:

    step1-2

    Note: If the external power supply 48VDC is battery-powered, due to the wide voltage range of the battery, it affects the normal operation of the robot's braking overvoltage protection circuit. The communication board circuit needs to be modified. As follows:

    Communication board resistor R8 changed to: 3K in parallel with 27K (i.e., 2.7K)

Power Interface Conversion to 24VDC

When the external power supply is 24VDC, a 24V to 48V power module needs to be added inside the control box.

Power module specifications: 24V to 48V 10A. Click Taobao linkopen in new window to purchase.

Modified image:

step2-1

The power module is affixed to the bottom shell with nano adhesive. When vibration requirements exist, the power module must be fixed to the bottom shell with screws.