Mitsubishi Electric MELSEC FX-2DA User Manual page 4

Miscellaneous
Item
Isolation
Number of occupied I/O
points
ATTENTION FOR WHEN SWITCHING SYSTEM ON/OFF
Due to the inevitable timing difference of the DC24V for the analog circuits and other power lines of the
base unit, the output of the FX-2DA special function block may behave erroneously before settling down
to operational conditions in approximately 1sec. Therefore, ensure that this behavior is taken into account
such that the end performance of the system is not degraded.
(example)
Photo-coupler isolation between analog and digital circuits.
DC/DC converter isolation of power from FX base unit.
Power switch
DC24V
supply
Specification
No isolation between analog channels.
8 points taken from the FX expansion bus
(can be either inputs or outputs)
cut analog lines
before switching
FX-2DA special
function block
External analog
machine