12/24/2024
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Home
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Rolling Stock Home
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AAR Types
> M920
AAR Rolling Stock Type: M920
AAR Class:
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
AAR Type:
M920
Detail Info:
Misc Cars
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Reporting Mark
Name
Count
CN
Canadian National Railways
1
NS
Norfolk Southern
1
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