List of Components in PLC – Programmable Logic Controller

In this article, we provided the commonly used list of components and devices commonly used in PLC (Programmable Logic Controller).

List of Components in PLC

Here are the PLC parts and devices mentioned below.

• Processor or CPU (Central Processing Unit)
• Memory modules (RAM and ROM) (Most PLCs have them inbuilt into the CPU)
• Analog Input modules
• Digital Input modules
• Analog Output modules
• Digital Output modules
• Communication modules (Ethernet, RS-232, RS-485, etc.)
• Power supply module
• Programming software
• Programming cables
• Programming devices (HMI, handheld programmers, etc.)
• Terminal blocks
• Mounting racks or bases
• I/O connectors
• Expansion modules
• Counters (Hardware/Software)
• Timers (Hardware/Software)
• High-speed counters and timers (Hardware/Software)
• Analog signal converters
• Proportional-Integral-Derivative (PID) controllers
• Motion controllers
• Data logging modules
• Safety modules
• Redundant processors and power supplies
• Battery backup modules
• Remote I/O modules
• Distributed I/O modules
• Human-Machine Interface (HMI) devices
• Real-time clock modules
• Barcode scanners
• RFID (Radio-Frequency Identification) readers
• Vision sensors
• Servo drives and motors
• Stepper drives and motors
• Linear encoders
• Safety relays
• Push buttons and indicator lights
• Limit switches
• Temperature sensors
• Signal conditioners
• Signal isolators
• Operator panels
• Industrial PC
• Industrial Ethernet switches
• Encoders
• Ethernet switches
• Solid-state relays
• Isolation amplifiers
• Barriers
• Cooling Fans
• Cabinet

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