Unitree B1 - Extended Interface Description

B1 User Manual
© 2022 All rights reserved, Unitree Robotics 11
Extended Interface Description
The back of the B1 provides sdk expansion interfaces to develop more extended functions for users. It includes 3
input interfaces (Gigabit Ethernet interface, Type-C interface, power interface), 7 Gigabit Ethernet extension interfaces,
5 Type-C extension interfaces, and 10 power extension interfaces. The sdk expansion interfaces are as shown in the figure
below.
Input
— 2×8PIN Gigabit Ethernet Interface
—
TYPE-C USB 2.0 Interface
—
XT30 (2+2) Power Interface
B1 Users’ Extende Dock - System Frame Diagram (Structure Top View) is shown in the figure:
USB
TYPE-C
12V
XT30 2+2
NET
2×8 PIN
24V
XT30 2+2
B1 Users’ Extende Dock - System Frame Diagram
(Structure Top View)
NET
2×8 PIN
NET
2×8 PIN
NET
2×8 PIN
USB
TYPE-C
USB
TYPE-C
5V
XT30 2+2
5V
XT30 2+2
12V
XT30 2+2
12V
XT30 2+2
NET
2×8 PIN
NET
2×8 PIN
NET
2×8 PIN
USB
TYPE-C
USB
TYPE-C
VIN
XT30 2+2
VIN
XT30 2+2
24V
XT30 2+2
24V
XT30 2+2
NET
2×8 PIN
USB
TYPE-C
VIN
XT30 2+2
 2×8PIN Gigabit Ethernet Interface+12V Power Supply+485/CAN (Pass-through) Interface:
1) Total number of Interfaces: 8 interfaces (2×8PIN waterproof interfaces)
2) Gigabit Ethernet: 1 channel is connected to the robot dog Mini PC, 7 channels are connected to external
3) Power Output: 12V × 7 channels, 10A electric current in total (same path as external power supply)
4) 485/CAN (Pass-through): 3-Interface CHA channel 485/CAN, 3-interface CHB channel 485/CAN
 Type-C USB2.0 Interface:
1) Total number of interfaces: 6 interfaces (Type-C waterproof interface)
2) 7-channel USB-HUB: The generatrix is connected to the robot dog MINIPC. 5 channels are connected to the
external; 2 channels are connected to 2 groups of USB, and then transfer to 485 (or CAN) Pass-through modules:
CHA/CHB
3) Power output: 5V/1A×5 channels (USB power supply is independent of external power supply)
 XT30(2+2) power supply +485/CAN (Pass-through) interface:
1) 36-58V input/output: 3 channels 10A electric current in total, CHA channel 2 interfaces 485/CAN + CHB channel
1interfacet CAN/485
2) 24V output: 3 channels 10A electric current in total, CHA channel 2 interfaces 485/CAN + CHB channel 1
interface CAN/485
3) 12V output: 3 channels 10A electric current in total, CHB channel 2 interfaces 485/CAN + CHA channel 1
interface CAN/485
4) 5V output: 2 channels 5A electric current in total, CHB channel 1 interface 485/CAN + CHA channel 1 interface
CAN/485