
B–63503EN/02
9. CONNECTION TO FANUC I/O Link
151
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 indicated by the 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 would cause 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
while they are off (max. 40 mA).
DOCOM
CE53(A25), (B25)
CE54(B24), (A25), (B25)
+24V 0V
+24 stabilized power supply
Relay
DV
DV
Parallel DO (output
signal) connection