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NRED voltage reducer selection for NBRA-669
The NRED voltage reducer can be used to protect the NBRC-61 chopper control board
from overvoltage peaks. Jumper X6 on the chopper control board defines if the NRED
voltage reducer is used. By default, the NRED voltage reducer is used and the jumper is
set to OFF (recommended).
X6
X6
OFF
ON
(default)
Note: When the jumper is set to ON, the NRED voltage reducer is not used. You must use
this setting if the chopper control board is replaced with a newer version and the brake
chopper does not include the NRED voltage reducer board.
Fault tracing and maintenance 45
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