They are intended for:-powering of blocks of system SAUT-CM/485 with voltage plus 15 V and plus 50 V;-organisation of data exchange between separate blocks of system on a serial channel in standard RS-485;-processing of a condition of control circuits of a locomotive: ???, ???, EDT (recuperation), TYAGA, ??? and the state of toggle switch "ALS-SAUT";-forming control commands: ?, ?, ??, ??, OT, ???, Uepk.
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