The Relay Board acts as a switch between the drive motors and the Sabertooth motor driver.
When the main power is cut via switch, the relays disengage, disconnecting the motors so you can push your droid without damaging the Sabertooth.
Alternatively, you can use the two jumper pins to keep the relay always on until the main power is cut.
A 15A fuse is recommended for the foot motors.
Dimensions: 70mm x 68mm
Available at shop.printed-droid.com
30A Double Relay Board:
The current version is the double 30A Board:



Connection diagram:
Klick on the labels

Fuse
Fuse
Jumper Pins
Relay power in
Motor 2 power in
Motor 1 power in
Switch terminal
Motor out
Motor out
Motor out
Motor out
20A Single Relay Board:
The “old” 20A version is recommended only for the dome motor. It doesn’t have a switch connector on the board, so power must be cut using the relay’s power input wires. While it can handle up to 20A, you should use a 5A fuse for the dome motor.
