FANUC Series 16/18/160/180-Model C Connection Manual (Hardware)

B–62753EN/01
6. CONNECTION OF I/O UNITS TO
MACHINE INTERFACE
69
The CNC has two JD1A interface connectors for the FANUC I/O Link.
Only one of the two connectors is selected according to the type of PMC,
and both are not used at the same time. For a system with a PMC-RB, the
I/O Link is connected to the main CPU board. For a system with a
PMC-RC, the I/O Link is connected to the option 3 board. Starting at this
point (main CPU board or option 3 board), the I/O Link is connected with
the I/O units and interface unit of the operators panel sequentially in a
daisy-chain manner.
In the I/O Link there are the master station and its slave stations. The
master is the control unit of the CNC, and the slaves are the I/O unit and
interface unit for the operators panel. 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. The operators panel
connection unit and interface unit for the operators panel are each
counted as one group.
The two connectors of the I/O link are named JD1A and JD1B, and are
common to all units (that have I/O Link function). 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 pin assignments of connectors JD1A and JD1B are common to all
units on the I/O Link, and are illustrated on the next page. Use the figures
when connecting the I/O Link irrespective of the type of unit.
Main CPU board
JD1A
(With PMC–RB)
Option 3 board
JD1A
(With PMC-RC)
Magnetic
circuit
FANUC I/O Unit - MODEL A 2 max
Max. 16
group
JD1B
Operator’s panel
JD1A
Connection unit or machine
operator’s panel interface unit
Machine
operator’s
panel
FANUC I/O Link
I/O=256/256 or less per group
I/O=1024/1024 or less in total I/O Link
JD1B
JD1A
Base unit 2Base unit 1
Series16
Control unit
JD1B
JD1A
JD1B
JD1A
Group
#0
Group
#1
Group
#2
Group
#3
Fig. 6.2.1 I/O Link connection diagram
6.2
CONNECTION OF THE
FANUC I/O Link
6.2.1
General

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