
6. CONNECTION OF I/O UNITS TO
MACHINE INTERFACE
B–63783EN/01
80
This section describes the DI/DO signal ratings for the basic module and
expansion modules A and B.
DI (input signal ratings)
Number of points 24 (per module)
Contact capacity 30 VDC, 16 mA or higher
Open–circuit
contact–to–contact
leakage current
1 mA or lower (at 26.4 V)
Closed–circuit
contact–to–contact
voltage drop
2 V or lower (including drop across the cable)
Delay time 2 ms (maximum) across the receiver
In addition, it is necessary to consider the sum of
the I/O Link transfer time (up to 2 ms) between the
CNC and I/O module and the ladder scan cycle
time (in the CNC).
DO (output signal ratings)
Number of points 16 (per module)
On–state maximum
load current
200 mA or lower, including instantaneous changes
On–state saturation
voltage
1 V (maximum) measured when the load current is
200 mA
Withstand voltage 24 V +20% or lower, including instantaneous
changes
Off–state outflow leak-
age current
20 A or lower
Delay time 50 µs (maximum) across the driver
In addition, it is necessary to consider the sum of
the I/O Link transfer time (up to 2 ms) between the
CNC and I/O module and the ladder scan cycle
time (in the CNC).
Turning on and off power (common to DO points) for the DO points
(output signals)
Turning off (opening) power supply pin DOCOM for the DO points
(output signals) turns off all DO points of each module at one time. The
state of the DO points is as shown below.
6.3.7
DI/DO Signal Ratings