For a DP remote locomotive, what is the required cab signal configuration in terms of the screen and the circuit breaker?

For a DP remote locomotive, what is the required cab signal configuration in terms of the screen and the circuit breaker?

• A. Cut-out Cab Signals using switches in screen; Cab Signal circuit breaker must remain on.
• B. Cab Signals on and the circuit breaker off
• C. Cut-out Cab Signals using switches in screen; circuit breaker off
• D. Cab Signals off and circuit breaker on

Answer: (A)

In DP remote operation, you disable the cab signal display for the remote control setup, but you must keep the cab signal circuit energized. Cutting out the cab signals from the screen prevents conflicting indications with the remote control interface, while leaving the cab signal circuit breaker ON ensures the signaling hardware remains powered for safety monitoring and automatic protection if the control mode changes or a fault occurs. This combination avoids misinterpretation from an active display while preserving essential electrical protection and readiness of the signaling system. Keeping signals on with the breaker off would remove power to the signaling circuits, and turning off the breaker would also disable important protections, which is unsafe.

In DP remote operation, you disable the cab signal display for the remote control setup, but you must keep the cab signal circuit energized. Cutting out the cab signals from the screen prevents conflicting indications with the remote control interface, while leaving the cab signal circuit breaker ON ensures the signaling hardware remains powered for safety monitoring and automatic protection if the control mode changes or a fault occurs. This combination avoids misinterpretation from an active display while preserving essential electrical protection and readiness of the signaling system. Keeping signals on with the breaker off would remove power to the signaling circuits, and turning off the breaker would also disable important protections, which is unsafe.