Class “N” – Caboose

NA

• Sensing, audio, emergency braking unit (CDU) that accepts, analyzes and displays information relevant to the rear of train
• The NA provides audible alerts and displays to assist the engineer operating the train and is equipped with emergency braking feature in the event normal brake capability is lost
• The arming feature prevents unauthorized use of the emergency braking device (4/99)

NB

• Receiver Display Unit (RDU)
• A device mounted on the control stand in the locomotive to receive, analyze and display information as transmitted by the SBU
• The RDU provides audible alerts and displays to assist the engineer in train operation (4/99)

NC

• Communications Logic Unit (CLU)
• A device located in the short hood of the locomotive which accepts and analyzes radio messages transmitted from the rear of the train by the SBU
• After the messages are analyzed the CLU forwards the information for display in the cab of the locomotive (4/99)

ND

• Input and Display Unit Unit (IDU). A device mounted on the control stand in the cab of the locomotive to display information which has been sent by the SBU and analyzed by the CLU
• The IDU provides audible alerts and displays to assist the locomotive engineer in the handling of the train (4/99)

NE

• Caboose mounted on eight wheels and longer than four-wheel caboose, but of the same general design (1/17-10/66)
• All cabooses (1/73-4/99)

NF (Rear End Device)

• A device mounted on the trailing coupler on the rear car of the train coupled to the brake pipe
• The SBT senses brake pipe pressure, and may sense motion and direction. This information is relayed by radio to the head end of the train to a RDU, CDU or a CLU/IDU combination
• In addition, the SBT acts as a marker to locate the rear of the train and is equipped with an emergency braking feature to be used in the event of a loss of the normal braking capability from the head end of the train (4/99)

NL

• Light only, may have brake pipe pressure device (NLU) mounted on side of trailing coupler on rear car
• The NLU may or not be coupled to the brake pipe. When coupled senses brake pipe pressure, and displays this information on a mechanical gauge on the side of unit
• Primary function is to act as a marker to indicate the rear of train (4/99)

NM

• Freight train service caboose for convenience of trainmen. This caboose is mounted on four wheels and has lookout at top over roof. It is fitted with bunks or benches and a stove for cooking and heating purposes, also tank for storage of drinking and washing water, and small tool storage boxes (1/17-10/66)

NU

• Sense and Braking Unit (SBU)
• A device mounted on the trailing coupler on the rear car of the train and coupled to the brake pipe
• The SBU senses brake pipe pressure, and may sense motion and direction
• This information is relayed by radio to the head end of the train to a RDU, CDU or a CLU/IDU combination
• In addition, the SBU acts as a marker to indicate the rear of the train
• The SBU is NOT equipped with an emergency braking feature (4/99)

Advertisement