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)（Input Format：DC input）

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 (9) WATANABEDENKI (1)
CAD	2D 3D
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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 ～ 16	Relay contact output / Transistor / source output / Transistor / sync output	-	-	Terminal Block	CE / UL / CSA

From: ₹ 8,197.80
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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	24	-	32 ～ 48	Transistor / sync output	-	-	Terminal Block / Connector	CE / UL / CUL / CSA

From: ₹ 13,675.62
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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 / UL / CUL

From: ₹ 43,051.21
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CC-Link IE Field Network, Block Type Remote Unit NZ2GF Series

MITSUBISHI

[CC-Link IE Field Network, Block Type Remote Unit]
・ CC-Link IE field network remote device station. Input/output devices can be more easily distributed according to the equipment
・ You can easily add the number of input/output points by connecting expansion units
・ It supports CC-Link IE field network synchronous communication function. Since the operation can be performed according to the synchronization cycle of the master station that supports the synchronous communication function, the operation timings of multiple slave stations can be aligned
・ Units that support the fast link-up function can quickly return to the line when the CC-Link IE field network is disconnected and then reconnected
・ Units that support the automatic I/O parameter setting function can operate the input/output unit without setting parameters, so the startup time can be shortened

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	24	Less than 50 to 100 mS	16	Transistor / sync output	24	None	Terminal Block	-

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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
8	DC input	12–24	-	-	-	-	-	Terminal Block	CE / UL / CUL / CSA

From: ₹ 8,901.73
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C Series C500 CompoNet Slave

OMRON

PLC that supports easy replacement of C500 units and improved maintainability.
[Features]
·The terminal block and mounting base unit of the C500 basic I/O unit can be used as is.
·When replacing the C500/C1,000H/C2,000H, it can be replaced without changing the occupied area of the control panel.
·The new CPU unit and I/O unit can be connected with a communication cable.
·Advanced functions such as CompoNet's smart function and network monitor can be introduced to existing equipment.
·An address conversion tool for C500CompoNet slaves is provided, and program asset diversion is also supported.
·A mounting plate for the CPU base unit is also available, which is convenient for mounting the power supply, CJ2, and CJ1CPU.
[Applications]
·Communication unit for C500/C1,000H/C,2000H/CV/CVM1 Mainly used as a replacement.

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
32	DC input	12–24 ～ 24	-	32	Relay contact output / Transistor / sync output / Other	-	-	Terminal Block	-

From: ₹ 42,110.60
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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 / UL / CUL / CSA

From: ₹ 66,582.98
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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
16 ～ 64	DC input	24	-	-	-	-	-	Terminal Block / Connector	CE / UL / CUL / CSA

From: ₹ 14,213.00
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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 / UL / CUL / CSA

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 / UL / CUL / CSA

From: ₹ 14,544.00
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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 / UL / CUL / CSA

From: ₹ 71,131.53
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WMB-DI16, Digital Input Module (16 Points)

WMB-DI16, Digital Input Module (16 Points)

WATANABEDENKI

Ideal for distributed installation in the FA/BA field.
This device is a module for inputting ON/OFF signals from relay contacts or open collectors.
It can also input and integrate signals from devices that output pulses.

[Features]
● Digital inputs 1 to 16ch can be used as pulse inputs as well.
● Data monitoring and various settings are possible by connecting a Modbus setting display (WMB-DM01: sold separately) or a setting tool (WRS-MST: free download).

● Can be used as a contact point 32ch input module by connecting an expansion module.
● The terminal block and main body are detachable to facilitate maintenance.
● Integrated values are stored in nonvolatile memory at times of power outages.

CAD ：: 2D

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	DC24V	-	-	-	-	None	Terminal Block	-

From: ₹ 28,051.64
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Product Series
CAD
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	MITSUBISHI	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	WATANABEDENKI
Product Series	Programmable Controller CP1L Expansion I/O Unit	Input/Output Unit CS1W	iQ-R Series Input/Output Unit	CC-Link IE Field Network, Block Type Remote Unit NZ2GF Series	I/O control unit I/O interface unit	C Series C500 CompoNet Slave	CJ series high speed counter unit	CJ Series Input Unit CJ1W-ID / IA	Interrupt Input Unit CJ1W-INT01	CJ Series Input/Output Unit CJ1W-MD	High Speed Counter Unit - CS1W-CT021/041	WMB-DI16, Digital Input Module (16 Points)
CAD												2D
From	₹ 8,197.80	₹ 13,675.62	₹ 43,051.21	₹ 28,030.39	₹ 8,901.73	₹ 42,110.60	₹ 66,582.98	₹ 14,213.00	₹ 31,506.51	₹ 14,544.00	₹ 71,131.53	₹ 28,051.64
Days to Ship	Same day or more	5 Day(s) or more	10 Day(s) or more	10 Day(s) or more	7 Day(s) or more	5 Day(s) 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	24 Day(s) or more
Number Of Inputs	8 ～ 24	16 ～ 96	-	16 ～ 32	8	32	-	16 ～ 64	16	16 ～ 32	-	16
Input Format	DC input	DC input	DC input	DC input	DC input	DC input	DC input	DC input	DC input	DC input	DC input	DC input
Rated Input Voltage(V)	-	24	-	24	12–24	12–24 ～ 24	-	24	24	5 ～ 24	-	DC24V
Input answer time	-	-	-	Less than 50 to 100 mS	-	-	-	-	-	-	-	-
Number of Outputs	8 ～ 16	32 ～ 48	-	16	-	32	-	-	-	16 ～ 32	-	-
Output Format	Relay contact output / Transistor / source output / Transistor / sync output	Transistor / sync output	Transistor / source output	Transistor / sync output	-	Relay contact output / Transistor / sync output / Other	-	-	-	Transistor / source output / Transistor / sync output	-	-
Rated load voltage(V)	-	-	12/24	24	-	-	-	-	-	-	-	-
Protection function	-	-	-	None	-	-	-	-	-	-	-	None
Connection Terminal	Terminal Block	Terminal Block / Connector	-	Terminal Block	Terminal Block	Terminal Block	Connector	Terminal Block / Connector	Terminal Block	Connector	Connector	Terminal Block
Representative Standard	CE / UL / CSA	CE / UL / CUL / CSA	CE / UL / CUL	-	CE / UL / CUL / CSA	-	CE / UL / CUL / CSA	CE / UL / CUL / CSA	CE / UL / CUL / CSA	CE / UL / CUL / CSA	CE / UL / CUL / CSA	-

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

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)（Input Format：DC input）

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