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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
Display
screen
Battery Unit connector
(Remove the seal to
connect the Battery Unit.)
CPU Units with 20 I/O Points
Left side
Display
screen
Battery Unit connector
(Remove the seal to
connect the Battery Unit.)
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
Front
Power supply
Input
terminals
terminals
Operation
buttons
Output terminals
(See note 1.)
ZEN Support Software connector
(also used for Memory Cassette.)
Front
Power supply
Input terminals
terminals
I 6 I 7
20C1AR-A-V2
Operation
buttons
Q4
Q5
Q6
Output terminals
ZEN Support Software connector
(also used for Memory Cassette.)
ZEN V2 Units
Right side
Expansion Unit connector
cover (See note 2.)
Do not remove this cover until
connecting an Expansion Unit.
Right side
I 8
I 9 I a
I b
Q7
Expansion Unit connector
cover (See note 2.)
Do not remove this cover until
connecting an Expansion Unit.
Display Screen
RUN ERR
Icon Meanings
Icon
Meaning
RUN
Display while in RUN mode.
ERR
Indicates an error.
▲
Displayed when there is a
higher-level menu or ladder
program line than the one
currently displayed.
▼
Displayed when there is a
lower-level menu or ladder
program line than the one
currently displayed.
Displayed when a password
had been set.
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