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Chapter 2 System Configuration
2-4
2.2 Product Functional Model
The following describes functional model of the MASTER-K120Sseries.
2.2.1 Product Functional Block
Product function block for the K120S series is as follows.
Main Unit Expansion Modules
Power supply Input signal Input signal
Built-in RS-232C I/F Output signal Output signal
Sub-system Description
CPU
• Signal processing function
-. Operating system function
-. Application program storage / memory function
-. Data storage / memory function
-. Application program execution function
Input
• The input signals obtained from the machine/process to appropriate signal levels for
processing
Output
• The output signals obtained from the signal processing function to appropriate signal
levels to drive actuators and/or displays
Power Supply
• Provides for conversion and isolation of the PLC system power from the main supply
Communication
Interface
• Provides the data exchange with other systems or PADT, such as KGLWIN, personal
computers
Built-in
RS-485
Special/communication
modules
Power
supply
Comm. I/F
Input
Output
Input
Output
CPU
•
DC24V
Power
supply