
B–63083EN/02
9. CONNECTION TO FANUC I/O Link
138
This section describes the specifications of the 2A output DO signals used
with expansion module C.
DO (output signal specifications)
Number of points 32 points (per module)
Maximum load current
when ON
2 A or less per point.
12 A maximum for the entire module
(DO: 16 points) (including momentary variations).
Withstand voltage 24 V +20% or less (including momentary
variations)
Leakage current when OFF 100 µA or less
Delay time [I/O Link transfer time (2 ms maximum)] + [ladder
scan period (depending on CNC)] must be
considered.
ON/OFF of the power supply (DO common) for DO signals (output
signals)
By turning off (opening) the power supply pin (DOCOM) for the DO
signals (output signals), all the DO signals of each module can be turned
off at one time. At this time, the DO state is as shown below.
DOCOM
ON
OFF
ON
OFF
ON
OFF
DO state when
DO is on in the
sequence
DO state when
DO is off in the
sequence
NOTE
When DO is on in the sequence, the ON/OFF state of
DOCOM is directly reflected in the DO state as indicated
above by the dashed box. The +24 V signal to be supplied
to the I/O module must not be turned off during operation.
Otherwise, a CNC communication alarm is issued. Ensure
that +24 V is supplied either when or before the power to the
CNC is turned on, and that +24 V is removed either when
or after the power to the CNC is turned off.
Parallel DO (output signal) connection
The 2A output module does not allow parallel DO connections including
parallel connections with the DO signals of other modules.
9.4.10
2A Output DO Signal
Specifications