3-3
Section
CompoBus/S I/O Link Units
214
3-3
CompoBus/S I/O Link Units
The CPM1A, CPM2A, or CPM2C (including the CPM2C-S) PCs can function as
Slaves to a CompoBus/S Master Unit (or SRM1 CompoBus/S Master Control
Unit) when a CompoBus/S I/O Link Unit is connected. The CompoBus/S I/O Link
Unit establishes an I/O link of 8 inputs and 8 outputs between the Master Unit
and the PC.
Note
For the CPM1A, a CPM1A CPU Unit with 30 or 40 I/O points must be used to
connected the CompoBus/S I/O Link Unit. It cannot be connected to a CPM1A
CPU Unit with 10 or 20 I/O points.
CompoBus/S Master Unit
(or SRM1 CompoBus/S
Master Control Unit)
Special Flat Cable, 2-core VCTF cable, or 4-core VCTF cable
(You cannot mix Special Flat Cable, 2-core VCTF cable, and 4-core VCTF cable. Use only one type of cable.)
CPM2C
or CPM2C-S
CPU Unit
CPM2C-SRT21
CompoBus/S
I/O Link Unit
CPM1A/CPM2A CPU Unit
CPM1A-SRT21
CompoBus/S
I/O Link Unit
Cable
Model
Specifications
Special Flat Cable
SCA1-4F10
4-core flat cable, 0.75 mm
2
VCTF cable
---
0.75 mm
2
2 cores or 0.75 mm
2
4 cores
(JIS C 3306)
From the standpoint of the CPU Unit, the 8 input bits and 8 output bits allocated
to the CompoBus/S I/O Link Unit are identical to input and output bits allocated to
Expansion I/O Units even though the CompoBus/S I/O Link Unit does not control
actual inputs and outputs. The input and output bits allocated to the Compo-
Bus/S I/O Link Unit are one side of an I/O link between the slave CPU Unit and
the CPU Unit to which the Master Unit is connected.
Master PC (CS Series)
CPU Unit
I/O memory
Output
2000
Input
2004
8 bits
8 bits
CompoBus/S
Master Unit
Unit No. 0
CPM1A, CPM2A, or CPM2C
CPU Unit with 30 I/O points
I/O memory
8 bits
8 bits
Input
IR 002
Output
IR 012
CompoBus/S
I/O Link Unit
Node
number:
0