Nomenclature
■ Standard LCD-type, Economy-type, and Communications-type CPU
Units (Except for ZEN-@C2@@-@-V2 Models)
CPU Units with 10 I/O Points
Left side
Front
Right side
Power supply Input
terminals
terminals
Operation
buttons
Display
screen
Display Screen
Output terminals
(See note 1.)
Expansion Unit connector
cover (See note 2.)
Do not remove this cover until
connecting an Expansion Unit.
RUN ERR
Battery Unit connector
(Remove the seal to
connect the Battery Unit.)
ZEN Support Software connector
(also used for Memory Cassette.)
Icon Meanings
Icon
Meaning
CPU Units with 20 I/O Points
RUN
ERR
■
Display while in RUN mode.
Indicates an error.
Left side
Front
Right side
Displayed when there is a
higher-level menu or ladder
program line than the one
currently displayed.
Power supply
terminals
Input terminals
I
6
I
7
I
8
I
9
I
a
I b
■
Displayed when there is a
lower-level menu or ladder
program line than the one
currently displayed.
20C1AR-A-V2
Operation
buttons
Display
screen
Displayed when a password
had been set.
Q
4
Q
5
Q6
Q7
Expansion Unit connector
cover (See note 2.)
Do not remove this cover until
connecting an Expansion Unit.
Output terminals
Battery Unit connector
(Remove the seal to
connect the Battery Unit.)
ZEN Support Software connector
(also used for Memory Cassette.)
Note: 1. With Communications-type CPU Units, the Q3 terminal is used as the RS-485 terminal. For details, refer to “Output Connections” on page
15.
2. Economy-type CPU Units are not provided with an Expansion Unit connector. Do not remove the cover.
16
Programmable Relay ZEN V2 Units
OMRON [ OMRON ELECTRONICS LLC ]
