
8.CONNECTION TO FANUC I/O Link B-63943EN/02
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8.4.10 2A Output DO Signal Specifications
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
DO state when DO is
on in the sequence
DO state when DO is
off in the sequence
ON
OFF
ON
OFF
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.