
B–63833EN/03
9. CONNECTION TO FANUC I/O Link
237
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 9.8.9 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.