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Old 08-08-2010, 11:29 PM   #6
GMEMD
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With older distributed power systems, the remote units do whatever the head end is doing.

With newer systems, the remotes can be controlled independently from the head end. Newer models of locomotives like the SD70ACe/M-2, and the EVO's, have computer screens in front of the engineer (usually 2, but sometimes only 1). One of these screens is used to control the power/braking of the remote units.
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