3-1
Section
Analog I/O Units
186
For example, in the following diagram an Analog I/O Unit is connected to a CPU
Unit with 30 I/O points.
CPM1A-MAD11
Analog I/O Unit
30-point
CPU Unit
IR 000
IR 001
Inputs
Outputs
IR 002
IR 003
IR 010
IR 011
IR 012
This section describes how to connect an Analog I/O Unit to the CPU Unit.
A maximum of 5 Expansion Units or Expansion I/O Units (a maximum of 3 Units
for the CPM2C-S), including up to 3 (see note.) Analog I/O Units, can be con-
nected to one CPM2C PC. When the Analog I/O Unit is used in combination with
other Expansion Units or Expansion I/O Units, there are no restrictions on the
connection order.
Note
When using the CPM2C-PA201, there is a limit to the number of CPM2C-MAD11
Units that can be connected. This limit ensures that the power consumption of
the CPU Unit, Expansion Units, and Expansion I/O Units does not exceed the
total power capacity of the service power supply from the Power Supply Unit
(24 V
600 mA = 14.4 W).
•
CPU Unit with 4-W power consumption: Connect no more than two CPM2C-
MAD11 Units
•
CPU Unit with 3-W power consumption: Connect no more than three CPM2C-
MAD11 Units
CPU Unit
CPM2C-MAD11
Analog I/O Units
Expansion
I/O Unit
I/O Allocation
I/O is allocated for the Analog I/O Unit in the same way as other Expansion Units
or Expansion I/O Units starting from the next word following the last allocated
word on the CPU Unit or previous Expansion Unit or Expansion I/O Unit. When
“m” is the last allocated input word and “n” the last allocated output word on the
CPU Unit, or previous Expansion Unit or Expansion I/O Unit, the allocation will
be as follows:
CPM2C-MAD11 Analog I/O Unit
Analog input 0:
Word m+1
Analog input 1:
Word m+2
Analog output:
Word n+1
Connecting the
CPM2C-MAD11 Analog
I/O Unit