24
Block Diagrams
Section 3-1
Remote Interface and I/O Blocks
I/O Block
Remote Interface
Protection
circuit
Indicators
Relay interface
I/O
devices
Power supply 12 or 24 VDC
I/O
interface
Trans-
mission
interface
CPU
System
ROM
I/O
interface
Indicators
DIP
switch
Work
RAM
Relay
output
RUN output
RS-485
interface
Switches
DC-DC
converter