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1. Prior to Starting
MFR-41CPU is an optional redundant CPU card for MFR-4100 units.
MFR-61CPU is an optional redundant CPU card for MFR-6100 units.
The MFR-41CPU/MFR-61CPU is specifically designed for the MFR-4100/MFR-6100. A standard MFR-
4100/MFR-6100 comes with a single CPU card installed into one of its two CPU slots. The optional
MFR-41CPU/MFR-61CPU allows you to operate the MFR-4100/MFR-6100 continuously, even if one
CPU card fails.
CAUTION
Installing this option, which requires accessing the unit interior by opening the panel,
should only be done by qualified technical personnel.
