Hitachi Plc - Hitachi PLC Getting Started

2. Hitachi PLC

System design
Hitachi has a compact type PLC "MICRO-EH" and modular type PLC "EH-150".
n MICRO-EH
è RUN
RUN/STOP
switch
Potentiometer
× 2
Communication
Port 1
(RS-232C)
n EH-150
Power supply module
CPU module
Battery
Input terminal
Communication port 2
(RS-422/485)
LED indication
RUN LED
Error LED
Reset button
é
RUN/STOP switch
Communication port 1 (RS-232C/422*/485*)
Communication port 2 (RS-232C)
4
LED indication
Expansion
connector
Output terminal
Expansion connector
Base unit
Terminal block
I/O modules
(+ terminal cover)
* : Supported by CPU308/316/448