AR10 Auto Reverser with built-in circuit breaker
The AR10 is an automatic reverse loop controller for DCC layouts. In addition it functions as a circuit breaker for the reverse loop. Very simple connections: Two wires to the main line and two wires to the auto reverse loop. Recommended for DCC systems from 1 amp to 10 amps. Make sure you set the trip rating correctly to match your DCC systems current capacity.
 
$69.95 MSRP Part Number: 5240233
https://www.ncedcc.com/online-store/AR10-Auto-Reverser-with-built-in-circuit-breaker-p194585873