
9. CONNECTION TO FANUC I/O Link
B–63523EN/03
280
NOTE
When the DO signal is in the ON state in the sequence, the
ON or OFF state of the DOCOM pin determines the state of
the signal, as shown within dotted lines in the above figure.
Do not turn off the +24 V supply provided by the CPD1 to the
I/O module during the operation. Turning off the +24 V
supply causes a CNC communication alarm. When turning
on the power, the +24 V supply to the I/O module must be
turned on before or at the same time as the power supply
to the CNC. When turning off the power, the +24 V supply
to the I/O module must be turned off after or at the same time
as the power supply to the CNC.
The DO load current can be doubled by connecting two DO points in
parallel and turning them on and off simultaneously in sequence, as
shown in the figure below. The maximum load current per DI point is 200
mA. Connecting two DO points in parallel and turning them on at the
same time produces a current of 400 mA. Note that, however, when two
DO points are connected in parallel, the leakage current also doubles
when they are off (max. 40 mA).
DOCOM
CE56(A24, B24, A25, B25)
CE57(A24, B24, A25, B25)
+24V 0V
+24 stabilized
power supply
Relay
DV
DV
Parallel DO (output
signal) connection