REV Robotics Expansion Hub, Manual

Page: 3 / 25

Expansion Hub Guide – Rev 4 © REV Robotics, LLC 2017 1
1 OVERVIEW
1.1 Expansion Hub Basics
The REV Robotics Expansion Hub is a low-cost education device that can communicate with any computer (Commonly
an Android Phone or the REV Robotics Control Hub) to provide the interfaces required for building robots and other
mechatronics. The Expansion Hub was purposed built to stand up to the rigors of the classroom and competition field.
It features a mature firmware designed for basic and advanced use cases with the ability to be field upgraded in the
future.
The REV Robotics Expansion hub is an approved device for use in the FIRST Tech Challenge and FIRST Global.
•
Physical Dimensions
o
143mm X 103mm X 29.5 mm
o
Mounting holes on a 16mm spacing
•
Input Voltage:
o
12V Nominal (8-15VDC)
•
3.3V Ports
o
8x Digital I/O : 1A Source Max
o
4x I2C 100kHz/400kHz Busses :
500mA Max
o
4x 12-bit Analog Inputs : 500mA Max
o
4x Quadrature Encoder Inputs :
500mA Max
•
5V Ports
o
5V Aux Power: 2A Max
o
Servos: 2A Maximum per Pair
o
USB 2.0: 1.5A Max
PORT QTY CONNECTOR DESCRIPTION
Battery 2 XT30
Connect one 12V NiMh battery, use the second connector to add
another Expansion Hub
Motor 4 JST VH, 2-pin Motor power output
Encoder 4 JST PH, 4-pin Quadrature encoder input
Servo 6 0.1” Header Extended range 5V servo output (500-2500ms)
5V Aux Power 2 0.1” Header Auxiliary device 5V/2A
Analog 4 JST PH, 4-pin Analog input 0-3.3V with two channels per connector
Digital 8 JST PH, 4-pin Digital Input/Output with two channels per connector
I2C 4 JST PH, 4-pin Four separate I2C busses, 400kHz bus speed
RS485 2 JST PH, 3-pin Use this serial communication port to add another Expansion Hub
UART 2 JST PH, 3-pin Debugging only
USB 1 Mini Type Connect directly to the Robot Controller Android phone or PC