10
CPU Units
The
four models of CPU Units can be broadly divided into two groups: Models that support
Inner Boards and the Controller Link Unit,
and models that do not. The CPU Units also vary in their program capacities, I/O capacities, memory capacities, and the presence of
an RS-232C port, as shown in the
Basic Specifications
table, below.
CPU Unit Overview
The following illustration shows the main components of a CQM1H-CPU61 CPU Unit.
Peripheral Port
Used to connect to Programming De-
vices
such as a
Programming Console or
a computer running CX-Programmer.
Also
supports Host Link and no-protocol
communications.
RS-232C Port (except CQM1H-CPU11)
Used for Host Link, no-protocol, 1:1 Data
Link,
or NT link (1:1 mode) communications
with external devices or other PLCs.
LED indicators
Inner Board Slot 1
(left slot)
Use this slot to mount a High-speed Counter Board,
Analog Setting Board, or Serial Communications Board.
Inner Board Slot 2
(right slot)
Use this slot to mount a High-speed Counter Board, Pulse
I/O Board, Absolute Encoder Interface Board, Analog Setting
Board, or Analog I/O Board.
Battery Compartment Cover
Open this cover to access the battery,
DIP switch, and Memory Cassette.
Inner Board Covers
Remove these covers when installing
or removing Inner Boards.
Built-in Inputs
There are 16 inputs built
into CPU Unit.
Connector
Add on Units horizontally
by joining connectors.
Sliders
Used to secure adjacent Units.
Basic Specifications
Model I/O
capacity
Program
capacity
DM
capacity
EM
capacity
CPU
Unit
Built-in serial ports Inner
Boards
Controller
Link Unit
capacity
(See note.) capacity
(words) capacity
(words) capacity
(words) Unit
built-in
inputs Peripheral
port RS-232C
port
Boards Link Unit
CQM1H-CPU61 512 15.2 K 6 K 6 K DC: 16 Yes Yes Supported
CQM1H-CPU51 7.2 K 6 K None
CQM1H-CPU21 256 3.2 K 3 K Not supported
CQM1H-CPU11 No
Note: I/O capacity = Number of input points (≤256) + Number of output points (≤256).
Maximum Number of Units
CPU Unit Controller Link
Unit Inner Boards I/O Units and
Dedicated I/O Units
CQM1H-CPU61 1 max. 2 max. 11 max. (total)
CQM1H-CPU51
()
CQM1H-CPU21 Not supported. Not supported.
CQM1H-CPU11
CPU Units
