Mitsubishi FX1N-14MR-ES/UL Hardware Manual page 100

FX1N Series Programmable Controllers
Mechanical Interlock
Ensure all loads are applied to the same side of
each PLC output, see previous figures. Loads
which should NEVER simultaneously operate
(e.g. direction control of a motor), because of a
critical safety situation, should not rely on the
PLC's sequencing alone. Mechanical interlocks
MUST be fitted to all critical safety circuits. (See
proceeding figure.)
Note: If using another output type, please replace
symbol with appropriate symbol.
PLC output
MC2 LSF
MC1
MC2 MC1 LSF
PLC output
Mechanical
interlock
6-8
Outputs 6.
Forward
operation
Reverse
operation