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- Each module performs a specific function, whether it’s handling inputs, outputs, communication, or even advanced operations like PID control. PLC modules can be categorized into four main types: Input modules, Output modules, Analog modules, and Communication modules.
ricoautomation.com/different-types-of-plc-modules-a-comprehensive-guide/
Mar 7, 2024 · Modules can be classified into three categories: Those used with discrete I/O levels. Those used with analog signal levels. Those that have intelligence to evaluate and modify the input signals before they can be used by the controller/also referred to as smart modules.
- Rack Or Chassis
- Power Supply (PS) Module
- Central Processing Unit
- Interface Module
- Signal Module
- Function Modules
- Communication Processor
The rack or chassis is the most important part of the modular or rack-mounted PLC system. PLC rack or chassis is a hardware assembly that plugs every communicating modules together (like input, output, CPU, power supply, communication, and additional function modules) in a single frame. In general, rack or chassis acts as a backbone of PLC system. ...
Power supply modules provide the required level of regulating powersupply to connected modules in the rack. This module is responsible for providing AC or DC power sourcesto operate the PLC through the backplane bus. Typically, most of the PLCs work at 120V- 240V AC or 5V- 24V DC and backplane output current 2A to 5A at 5V DC.
Central Processing Unit (CPU) acts as the brain of PLC system. Basically, CPU performs arithmetic,logic, controlling operations specified by the programming instructions. When we talk about PLC system, CPU has different type of operating modes. 1. In programming mode, CPU downloads the logic from PC for an editing programs. 2. In running mode, CPU ...
The interface module is optional or an additional module. It is used for the rack to rack communication in multi-tier configuration in modular PLC system.
Signal module exchanges the data information through the input and output modules. 1. Input signal modules are used for connecting digital or analog field inputs to PLC. 2. Output signal modules are used for connecting digital or analog field outputs from PLC. These digital or analog I/O signal can be interfaced with through signal module.
The function module is also added as an optional module. It is used in only in modular PLC or rack-mounted PLC and not in compact PLC. For the function module, you can use the analog and digital types of modules. The high-speed counter modules, PID, weighing modules can easily connect to function modules. And PID, CNC, position controller can inter...
The communication processor is an optional module. It can be used for providing an additional communication port for communication protocols. It is used for the networking communication between multiple processors or PLC. Also, CP exchanges data between PLC, SCADA, HMI, and other systems. These are the 7 types of PLC modules that are mostly used in...
Mar 7, 2024 · A programmable logic controller (PLC) is a specialized microprocessor-based controller that is capable of storing instructions to implement control functions such as sequencing, timing, counting, arithmetic, communication, and data manipulation. Engineers with limited computer knowledge can operate them.
Oct 16, 2024 · The power supply, communications module, Input/Output module are all separate to the actual microcontroller so you have to manually connect them to each other to create your PLC control system. A type of modular PLC is the rack-mounted or rack mount PLC.
Apr 13, 2023 · Let’s look at the types of PLC modules used in rugged computers that operate under harsh conditions. There are seven PLC module types: Rack or Chassis. Power supply (PS) Module. Central processing unit. Interface Module(IM). Signal Module (SM). Function Modules (FM). Communication Processor (CP).
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Sep 17, 2024 · PLC Input Module Types. Here is a short selection of the most common PLC input module types. Some companies may manufacture specialized modules that do not appear on this list. DC input modules respond to a limited range of voltage, usually 12-24 or only 24 volts.
