Omron ZEN Operation Manual page 42

Nomenclature and Basic Operation
LED-type CPU Units without Display
Models with 10 I/O Points
Left Side
Battery Unit connector
(Remove the seal to
connect the Battery
Unit.)
LED Indicators
18
Front
Power supply
terminals
LED indicators
Name Color
POWER Green
RUN Green
ERROR Red
Right Side
Input terminals
2
Output terminals
Personal computer
connector (also used for
Memory Cassette.)
Remove this cover to
connect Expansion I/O Unit.
Meaning
Lit Power supplied
Not lit No power
Lit Operating (RUN)
Not lit Stopped (STOP)
Lit Error
Not lit Normal
Section 1-3
Expansion Unit
connector cover