
B–63323EN/03
6. CONNECTION OF I/O UNITS TO
MACHINE INTERFACE
65
In the I/O there are the master station and its slave stations. The master
is the control unit of the CNC, and the slave is the interface for I/O units.
The slaves are divided into groups, and up to 16 groups can be connected
to one I/O Link. A maximum of two base I/O units can be connected as
a group using I/O Unit–MODEL A. The operator’s panel connection unit
and connection unit are each counted as one group.
The I/O Link is connected in different ways depending on the types of
units actually used and the number of I/O points. To connect the I/O Link,
the assignment and addresses of the I/O signals have been made
programmable with the PMC program. The maximum number of I/O
points is 1024.
The two connectors of the I/O Link are named JD1A and JD1B, and are
common to all units.
A cable is always connected from JD1A of a unit to JD1B of the next unit.
Although JD1B of the last unit is not used and left open, it need not be
connected with a terminator. (The terminator is needed on the last
interface module in the same group containing an I/O Unit–MODEL A.)
The pin assignments of connectors JD1A and JD1B are common to all
units on the I/O Link, and are shown on the following page. Use the
figures when connecting the I/O Link irrespective of the type of unit.
JDIA
JDIB
JDIA
FANUC I/O Link
I/O=1024/1024 or less in total I/O
JDIB
JDIA
JDIB
JDIA
FANUC I/O Unit–MODEL A ×2max
⋅
⋅
⋅
JDIB
JDIA
Mother board
Operator’s I/O module
Operator’s connection unit
or
Operator’s interface unit
Machine
operator’s
panel
I/O module for separation
Basic
module
Extended
module 1
Extended
module 2
Extended
module 3
Max. 16 group
Base unit 1 Base unit 2
Magnetic circuit
I/O per group = 256/256 or less
CNC
Fig.6.2 I/O Link connection diagram
6.2
CONNECTION OF
THE FANUC I/O LINK