The Control (REV-31-1595) and Expansion Hub (REV-31-1153) were designed with a number of protection features built into the device. These include the following:
Reverse battery input protection
Electrostatic discharge (ESD) protection on all connections
Over-current protection on all power buses
Digital I/O bus
I2C bus
Analog bus
USB
Over-current monitoring for individual Motor Channels
Keyed and locking connectors
Fail-safe mode at communication loss
Servo bus per pair (0-1, 2-3, 4-5)
Encoder bus