6. CONNECTION OF I/O UNITS TO
+24 V stabilized power supply
1 Xm+0.0 through Xm+0.7 are DI pins for which a common voltage can be selected. That is, by
connecting the DICOM0 CB150(24) 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 such accidents, the connection of the DICOM0
CB150(24) pin to the 0 V power supply is recommended wherever possible.
2 For safety reasons, the emergency stop signal needs to be allocated to an appropriate bit X0.4
of the addresses for which the common voltage is fixed. To put it another way, no emergency
stop signal can be input from this connector panel I/O module. An emergency stop signal
should be allocated to the built–in I/O module of the Power Mate or an I/O module supporting
the FANUC I/O Link.
3 For unused DI pins allocated to the addresses for which the common voltage is fixed (from
Xm+1.0 to Xm+1.7 and from Xm+2.0 to Xm+2.7), the logic is fixed to “0”. For unused pins
allocated to Xm+0.0 to Xm+0.7 for which the common voltage can be selected, the logic is fixed
to “0” when the DICOM0 CB150(24) pin is connected to the 0 V power supply. When the
DICOM0 CB150(24) pin is connected to the +24 V power supply, the logic is fixed to “1”. The
logic of the unused pins allocated to Xm+0.0 to Xm+0.7 is variable when the contact of the
DICOM0 CB150(24) pin is open.