CPUs
The four models of CPUs can be broadly divided into two groups: Models that support Inner Boards and the Controller Link Unit, and
models that do not. The CPUs 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.
J NOMENCLATURE
The following illustration shows the main components of a CQM1H-CPU61 CPU.
Sliders
Used to secure adjacent Units.
Battery Compartment Cover
Open this cover to access the battery,
DIP switch, and Memory Cassette.
Connector
Add on Units horizontally
by joining connectors.
LED indicators
Mini-Peripheral Port
Used to connect to Programming De-
vices such as a Programming Console or
Built-in Inputs
a
computer running CX-Programmer.
There are 16 inputs built
into CPU Unit.
Also supports Host Link and no-protocol
communications.
Inner Board Covers
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.
Remove these covers when installing
or removing Inner Boards.
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.
Inner Board Slot 1 (left slot)
Use this slot to mount a High-speed Counter Board,
Analog Setting Board, or Serial Communications Board.
J OVERVIEW
Built-in serial ports
Model
I/O capacity Program
DM
EM
CPU
Inner
Boards Link
Module
Controller
(See Note.)
capacity
(words)
capacity
(words)
capacity
(words)
Unit
Peripheral
port
RS-232C
built-in
inputs
port
512
256
DC: 16
Yes
Yes
Supported
CQM1H-CPU61
CQM1H-CPU51
CQM1H-CPU21
CQM1H-CPU11
15.2 K
7.2 K
3.2 K
6 K
6 K
3 K
6 K
None
Not supported
No
J MAXIMUM NUMBER OF MODULES
CPU
Controller Link Module Inner Boards
I/O Modules and
Dedicated I/O Modules
1 max.
2 max.
11 max.
CQM1H-CPU61
CQM1H-CPU51
CQM1H-CPU21
CQM1H-CPU11
16 max. using I/O Expansion and
Control Interface modules
Not supported.
Not supported.
Note: I/O capacity = Number of input points (≤ 256) + Number of output points (≤ 256).
A--159
Programmable Controller CQM1H
OMRON [ OMRON ELECTRONICS LLC ]
