
B–63833EN/03
9. CONNECTION TO FANUC I/O Link
187
This section describes the specifications of the DI/DO signals used with
the basic module and expansion modules A and B.
DI (input signal specifications)
Number of points 24 points (per module)
Contact rating 30 VDC, 16 mA or more
Leakage current between
contacts when opened
1 mA or less (26.4 V)
Voltage decrease between
contacts when closed
2 V or less (including a cable voltage decrease)
Delay time The receiver delay time is 2 ms (maximum). In
addition, [I/O Link transfer time between CNC and
I/O module (2 ms maximum)] + [ladder scan period
(depending on CNC)] must be considered.
DO (output signal specifications)
Number of points 16 points (per module)
Maximum load current
when ON
200 mA or less including momentary variations
Saturation voltage when
ON
1 V (maximum) when the load current is 200 mA
Withstand voltage 24 V +20% or less including momentary variations
Leakage current when
OFF
20 µA or less
Delay time The driver delay time is 50 µs (maximum). In
addition, [I/O Link transfer time between CNC and
I/O module (2 ms maximum)] + [ladder scan period
(depending on CNC)] needs to 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 the same 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
9.6.7
DI/DO Signal
Specifications