
B-63943EN/02 8.CONNECTION TO FANUC I/O Link
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NOTE
1 Xm+0.0 through Xm+0.7 and Xm+5.0 through
Xm+5.7 are DI pins for which a common voltage
can be selected. That is, by connecting the
DICOM0 CE56(A14) or DICOM5 CE57(B14) pin to
the +24 V power supply, a DI signal can be input
with its logical state reversed. If, however, a cable
is connected to ground, it has the same effect as
inputting an ON state DI signal. To prevent this
from occurring, the connection of the DICOM0
CE56(A14) and DICOM5 CE57(B14) pins to the 0
V power supply is recommended whereever
possible.
For safety reasons, the emergency stop signal
needs to be allocated to an appropriate bit of the
addresses for which the common voltage is fixed.
See "Address allocation" in Section 8.6.9 for details
of how to allocate the emergency stop signal.
For unused DI pins allocated to the addresses for
which the common voltage is fixed, the logic is
fixed to "0". For unused pins allocated to the
addresses for which the common voltage can be
selected, the logic is fixed to "0" when the DICOM0
CE56(A14) or DICOM5 CE57(B14) pin is
connected to the 0 V power supply. When the
DICOM0 CE56(A14) or DICOM5 CE57(B14) pin is
connected to the +24 V power supply, the logic is
fixed to "1". The logic of the unused pins is
variable when the contacts of the DICOM0
CE56(A14) and DICOM5 CE57(B14) pins are
open.
2 An output DC voltage of +24 V at CE56 (B01) and
CE57 (B01) is for DI signals. Do not supply 24
VDC to these pins from the outside.