What is a PLC (Programmable Logic Controller) and How Do Input/Output Units Function in Automated Systems?

A PLC, or Programmable Logic Controller, is the brains behind many automated systems. It's like a specialized computer designed for controlling machines and processes. PLCs use Input/Output (I/O) units to communicate with sensors and actuators in the actual system. These I/O units serve as the interface between the digital world of the PLC and the physical world of your machines. Inputs gather data from sensors, while outputs send control signals to devices like motors and valves, allowing the PLC to make decisions and automate tasks.

How Do PLC Input/Output Units Interface with Devices and Sequencers in Industrial Automation?

PLC I/O units interface with devices through wiring connections. Inputs are connected to sensors or switches, while outputs are linked to devices like motors, valves, or lights. The PLC's programming defines how inputs and outputs interact. For example, an input from a temperature sensor might trigger an output to turn on a cooling fan. PLCs can also work in sequence, performing a series of tasks based on inputs and previous outcomes. This sequence can be programmed to control complex industrial processes.

How Do I Install and Program PLC Input/Output Units for Optimized Control in Automated Machinery?

Installing PLC I/O units involves mounting them in a control panel, connecting wires, and ensuring proper electrical connections. To program a PLC for optimized control, you'll use specialized software to create a logic program. This program defines how the PLC responds to different inputs and manages outputs. It's essential to understand your machinery's requirements, design a logical program, and thoroughly test it to ensure efficient and safe operation.

In Which Industrial Applications Are PLCs Commonly Used?

PLCs are incredibly versatile and can be found in various industrial applications. They're widely used in manufacturing for tasks like assembly line control and quality assurance. They're also essential in processes like water treatment, energy production, and food production. Basically, anywhere automation and precise control are needed, you'll often find PLCs at the heart of the operation.

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PLC (Input/Output Units)（Representative Standard：CE）

PLCs (Input/Output Units), formally called "programmable logic controllers," are components used as an interface between devices and sequencers. They work by controlling the on/off switching of the output device using a preset program that operates in response to the on/off switching of switches and sensors. They were initially developed as an alternative to relay circuits and are used in controls for boilers, pumps, automated machinery that operate inside factories, and more. PLCs are broadly divided into 2 types, modular type and packaged type. Modular types require input components and standalone units to be combined and allow for more freedom of customization. Packaged types are totally pre-assembled to offer an inexpensive installation solution.

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Brand	MITSUBISHI (2) OMRON (11) WATANABEDENKI (0)
CAD	2D 3D
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CJ Series Output Unit CJ1W-OC / OA / OD

OMRON

CJ Series Output Unit CJ1W-OC / OA / OD

Volume Discount

Number Of Inputs	Input Format	Rated Input Voltage(V)	Input answer time	Number of Outputs	Output Format	Rated load voltage(V)	Protection function	Connection Terminal	Representative Standard
-	-	-	-	8 ～ 64	Relay contact output / Triac output / Transistor / source output / Transistor / sync output	-	Output protection function	Terminal Block / Connector	CE

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Programmable Controller CP1L Expansion I/O Unit

OMRON

Programmable Controller CP1L Expansion I/O Unit

Volume Discount

Number Of Inputs	Input Format	Rated Input Voltage(V)	Input answer time	Number of Outputs	Output Format	Rated load voltage(V)	Protection function	Connection Terminal	Representative Standard
8 ～ 24	DC input	-	-	8 ～ 32	Relay contact output / Transistor / source output / Transistor / sync output	-	-	Terminal Block	CE

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iQ-R Series Input/Output Unit

MITSUBISHI

- I/O module, iQ-R series from MITSUBISHI.
- Input/output rating is printed at the front, reducing incorrect wiring.
- Easy-to-use cable tie hook for tidy wiring.
- Existing 16-point terminal blocks are reusable, eliminating rewiring.
- Simple confirmation by product serial no. printed on the front.
- Alternating toggle switch used to display between 32-point LED signals.
- Terminal signals are clearly labeled and color-coded.
- Up to 32 LED signals clearly visible.

Number Of Inputs	Input Format	Rated Input Voltage(V)	Input answer time	Number of Outputs	Output Format	Rated load voltage(V)	Protection function	Connection Terminal	Representative Standard
-	DC input	-	-	-	Transistor / source output	12/24	-	-	CE

From: ₹ 43,051.21
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CJ Series Input Unit CJ1W-ID / IA

OMRON

CJ Series Input Unit CJ1W-ID / IA

Volume Discount

Number Of Inputs	Input Format	Rated Input Voltage(V)	Input answer time	Number of Outputs	Output Format	Rated load voltage(V)	Protection function	Connection Terminal	Representative Standard
8 ～ 64	DC input / AC input	24 ～ 200 to 240	-	-	-	-	-	Terminal Block / Connector	CE

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I/O control unit I/O interface unit

OMRON

I/O Control Unit, I/O Interface Unit

Number Of Inputs	Input Format	Rated Input Voltage(V)	Input answer time	Number of Outputs	Output Format	Rated load voltage(V)	Protection function	Connection Terminal	Representative Standard
1 ～ 8	DC input	12–24	-	1	-	5	-	Terminal Block / Connector	CE

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SYSMAC CJ series CJ2M　pulse I/O block

OMRON

SYSMAC CJ Series CJ2M Pulse I/O Block

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Number Of Inputs	Input Format	Rated Input Voltage(V)	Input answer time	Number of Outputs	Output Format	Rated load voltage(V)	Protection function	Connection Terminal	Representative Standard
10	-	-	-	6	Transistor / sync output	-	-	Connector	CE

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Input/Output Unit CS1W

OMRON

An input/output unit for SYSMAC CS1.
[Features]
·Number of inputs: 16, 32, 48, 64, 96.
·Number of outputs: 8, 16, 32, 48, 64, 96.
[Applications]
·For SYSMAC CS1.

Number Of Inputs	Input Format	Rated Input Voltage(V)	Input answer time	Number of Outputs	Output Format	Rated load voltage(V)	Protection function	Connection Terminal	Representative Standard
16 ～ 96	DC input / AC input / AC/DC input	24 ～ 200 to 240	-	8 ～ 96	Relay contact output / Triac output / Transistor / source output / Transistor / sync output	-	-	Terminal Block / Connector	CE

From: ₹ 13,675.62
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CJ series high speed counter unit

OMRON

CJ Series High Speed Counter Unit

Number Of Inputs	Input Format	Rated Input Voltage(V)	Input answer time	Number of Outputs	Output Format	Rated load voltage(V)	Protection function	Connection Terminal	Representative Standard
-	DC input	-	-	-	-	-	-	Connector	CE

From: ₹ 66,582.98
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Interrupt Input Unit CJ1W-INT01

OMRON

Interrupt Input Unit CJ1W-INT01

Number Of Inputs	Input Format	Rated Input Voltage(V)	Input answer time	Number of Outputs	Output Format	Rated load voltage(V)	Protection function	Connection Terminal	Representative Standard
16	DC input	24	-	-	-	-	-	Terminal Block	CE

From: ₹ 31,506.51
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CJ Series Input/Output Unit CJ1W-MD

OMRON

CJ Series Input/Output Unit CJ1W-MD

Volume Discount

Number Of Inputs	Input Format	Rated Input Voltage(V)	Input answer time	Number of Outputs	Output Format	Rated load voltage(V)	Protection function	Connection Terminal	Representative Standard
16 ～ 32	DC input	5 ～ 24	-	16 ～ 32	Transistor / source output / Transistor / sync output	-	-	Connector	CE

From: ₹ 14,544.00
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CS1D series I/O interface unit

OMRON

CS1D Series I/O interface unit. Connection terminal / connector

Number Of Inputs	Input Format	Rated Input Voltage(V)	Input answer time	Number of Outputs	Output Format	Rated load voltage(V)	Protection function	Connection Terminal	Representative Standard
-	-	-	-	-	-	-	-	Connector	CE

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High Speed Counter Unit - CS1W-CT021/041

OMRON

High Speed Counter Unit CS1W-CT021 / 041

Number Of Inputs	Input Format	Rated Input Voltage(V)	Input answer time	Number of Outputs	Output Format	Rated load voltage(V)	Protection function	Connection Terminal	Representative Standard
-	DC input	-	-	-	-	-	-	Connector	CE

From: ₹ 71,131.53
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CC-Link IE Field Network Basic, Block Type Remote Unit

MITSUBISHI

[CC-Link IE Field Network, Basic Block Type Remote Unit]
・ CC-Link IE field network Basic slave station. Input/output devices can be more easily distributed according to the equipment
・ It supported for CC-Link IE Field Network Basic diagnostic function. With the engineering tool, you can check for network abnormalities and input/output unit abnormalities
・ Parameters can be easily set with just a switch operation

Number Of Inputs	Input Format	Rated Input Voltage(V)	Input answer time	Number of Outputs	Output Format	Rated load voltage(V)	Protection function	Connection Terminal	Representative Standard
-	-	-	-	-	Transistor / sync output	24	-	-	CE

From: ₹ 43,524.69
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Brand
Product Series
From
Days to Ship
Number Of Inputs
Input Format
Rated Input Voltage(V)
Input answer time
Number of Outputs
Output Format
Rated load voltage(V)
Protection function
Connection Terminal
Representative Standard

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Brand	OMRON	OMRON	MITSUBISHI	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	MITSUBISHI
Product Series	CJ Series Output Unit CJ1W-OC / OA / OD	Programmable Controller CP1L Expansion I/O Unit	iQ-R Series Input/Output Unit	CJ Series Input Unit CJ1W-ID / IA	I/O control unit I/O interface unit	SYSMAC CJ series CJ2M　pulse I/O block	Input/Output Unit CS1W	CJ series high speed counter unit	Interrupt Input Unit CJ1W-INT01	CJ Series Input/Output Unit CJ1W-MD	CS1D series I/O interface unit	High Speed Counter Unit - CS1W-CT021/041	CC-Link IE Field Network Basic, Block Type Remote Unit
From	₹ 10,491.58	₹ 5,646.00	₹ 43,051.21	₹ 14,213.00	₹ 8,901.73	₹ 10,309.00	₹ 13,675.62	₹ 66,582.98	₹ 31,506.51	₹ 14,544.00	₹ 32,502.00	₹ 71,131.53	₹ 43,524.69
Days to Ship	Same day or more	Same day or more	10 Day(s) or more	5 Day(s) or more	5 Day(s) or more	Same day or more	5 Day(s) or more	5 Day(s) or more	5 Day(s) or more	Same day or more	5 Day(s) or more	5 Day(s) or more	10 Day(s) or more
Number Of Inputs	-	8 ～ 24	-	8 ～ 64	1 ～ 8	10	16 ～ 96	-	16	16 ～ 32	-	-	-
Input Format	-	DC input	DC input	DC input / AC input	DC input	-	DC input / AC input / AC/DC input	DC input	DC input	DC input	-	DC input	-
Rated Input Voltage(V)	-	-	-	24 ～ 200 to 240	12–24	-	24 ～ 200 to 240	-	24	5 ～ 24	-	-	-
Input answer time	-	-	-	-	-	-	-	-	-	-	-	-	-
Number of Outputs	8 ～ 64	8 ～ 32	-	-	1	6	8 ～ 96	-	-	16 ～ 32	-	-	-
Output Format	Relay contact output / Triac output / Transistor / source output / Transistor / sync output	Relay contact output / Transistor / source output / Transistor / sync output	Transistor / source output	-	-	Transistor / sync output	Relay contact output / Triac output / Transistor / source output / Transistor / sync output	-	-	Transistor / source output / Transistor / sync output	-	-	Transistor / sync output
Rated load voltage(V)	-	-	12/24	-	5	-	-	-	-	-	-	-	24
Protection function	Output protection function	-	-	-	-	-	-	-	-	-	-	-	-
Connection Terminal	Terminal Block / Connector	Terminal Block	-	Terminal Block / Connector	Terminal Block / Connector	Connector	Terminal Block / Connector	Connector	Terminal Block	Connector	Connector	Connector	-
Representative Standard	CE	CE	CE	CE	CE	CE	CE	CE	CE	CE	CE	CE	CE

Configure

Specification/Dimensions

Number Of Inputs
1

8

10

12

16

24

32

48

64

96
Clear

Input Format
- DC input
- AC input
- AC/DC input
Clear

Rated Input Voltage(V)
5

DC5/12

12–24

24

DC24V

100 to 120

200 to 240
Clear

Input answer time
- Less than 50 to 100 mS
Clear

Number of Outputs
1

6

8

16

32

48

64

96
Clear

Output Format
- Relay contact output
- Triac output
- Transistor / source output
- Transistor / sync output
- Other
Clear

Rated load voltage(V)
5

12

12/24

12＄24

24

240 AC
Clear

Protection function
- None
- Output protection function
Clear

Connection Terminal
- Terminal Block
- Connector
Clear

Representative Standard
- CE
- UL
- CUL
- CSA
Clear

Related Categories to PLC (Input/Output Units)

FAQ PLC (Input/Output Units)

Question: What is a PLC (Programmable Logic Controller) and How Do Input/Output Units Function in Automated Systems?: Answer: A PLC, or Programmable Logic Controller, is the brains behind many automated systems. It's like a specialized computer designed for controlling machines and processes. PLCs use Input/Output (I/O) units to communicate with sensors and actuators in the actual system. These I/O units serve as the interface between the digital world of the PLC and the physical world of your machines. Inputs gather data from sensors, while outputs send control signals to devices like motors and valves, allowing the PLC to make decisions and automate tasks.
Question: How Do PLC Input/Output Units Interface with Devices and Sequencers in Industrial Automation?: Answer: PLC I/O units interface with devices through wiring connections. Inputs are connected to sensors or switches, while outputs are linked to devices like motors, valves, or lights. The PLC's programming defines how inputs and outputs interact. For example, an input from a temperature sensor might trigger an output to turn on a cooling fan. PLCs can also work in sequence, performing a series of tasks based on inputs and previous outcomes. This sequence can be programmed to control complex industrial processes.
Question: How Do I Install and Program PLC Input/Output Units for Optimized Control in Automated Machinery?: Answer: Installing PLC I/O units involves mounting them in a control panel, connecting wires, and ensuring proper electrical connections. To program a PLC for optimized control, you'll use specialized software to create a logic program. This program defines how the PLC responds to different inputs and manages outputs. It's essential to understand your machinery's requirements, design a logical program, and thoroughly test it to ensure efficient and safe operation.
Question: In Which Industrial Applications Are PLCs Commonly Used?: Answer: PLCs are incredibly versatile and can be found in various industrial applications. They're widely used in manufacturing for tasks like assembly line control and quality assurance. They're also essential in processes like water treatment, energy production, and food production. Basically, anywhere automation and precise control are needed, you'll often find PLCs at the heart of the operation.

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PLC (Input/Output Units)（Representative Standard：CE）

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