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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OMRON PLC (Input/Output Units)（Representative Standard：UL）

OMRON offers products PLC (Input/Output Units) specified by Representative Standard UL from Electrical & Controls product category. There are a total of 17 items. Parts and equipment for controlling machines and electrical systems. Controllers and power supplies. OMRON products are available to order through MISUMI online 24 hours a day. Free shipping, no minimum order.

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Specification/Dimensions

Number Of Inputs
1

2

4

8

8 points

10

12

16

16 points

24

32

32 points

48

64

64 points

96

NA
Clear

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

Rated Input Voltage(V)
DC-10～+10

1～5 / 0～5 / 0～10

5

DC5

DC5V

DC5-12

DC5/DC12

DC5/24

12 to 24

12–24

DC12/24

DC12~24

DC 12/24

DC13 to 30

18-30 DC

20.4-28.8 DC

DC20.4 to 28.8

24

24 DC

24 V

DC24

DC24V

DC 24

DC48

DC48/AC48

AC100V

AC100-120

AC 100-120

100 to 120

AC100 to 120

AC100 to 120V

AC100～120

VAC 100–120

AC100 to 240

AC100 to 240V

AC 100–240

AC200-240

200 to 240

AC200 to 240

(Not applicable)

NA

Not available
Clear

Input answer time
- Less than 1 mS
- Less than 10 to 20 mS
- Less than 50 to 100 mS
- Other
Clear

Number of Outputs
0

1

2

2 (test)

4

6

7

8

8 points

16

16 points

16/32/48/64

24

32

32 points

48

64

64 points

96

NA
Clear

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

Rated load voltage(V)
DC-10～+10

5

DC5 to 12

DC5/12/24

DC5 to 24

DC5～24

12

DC12-24

12/24

12＄24

DC12 to 24

DC12/24

DC12/24V

DC 12/24

DC 12–24

24

DC24

DC24V

DC24/AC240

DC24V/AC240V

DC 24 / AC 240

DC48

AC100-240

100 to 240 AC

AC100～240

AC 100 - 240

AC 100–240

DC110/AC240

240 AC

AC240

AC 240 / DC 24

AC250V/DC30V
Clear

Protection function
- None
- Input protection function
- Output protection function
- Other
Clear

Connection Terminal
- Terminal Block
- Connector
- Terminal block/connector
- Europe terminal block
Clear

Representative Standard
- CE
- UL
- CUL
- TUV
- CSA
- Other
Clear

Brand	ANYWIRE (0) BEIJER ELECTRO (0) FESTO (0) FUJI ELECTRIC (5) KOYO ELECTRONIC (0) MITSUBISHI (29) OMRON (17) PANASONIC (2) Schneider Electric (0) WAGO (1) WATANABEDENKI (0)
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Until 30/06/2024

CJ Series Output Unit CJ1W-OC / OA / OD

OMRON

A basic PLC (I/O unit) available with multiple variations from high-speed types to multi-point types.
[Features]
· Available with any of three output types: relay contact outputs, triac outputs, or transistor outputs.
· For transistor outputs, select from sinking outputs or sourcing outputs.
· A wide variety of terminal block conversion units are available for easy wiring of external output devices.
[Applications]
· Can be used for basic PLC output.

From: ฿ 4,443.00
Special Price
Days to Ship: Same day

Same day

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Until 30/06/2024

CJ Series Input Unit CJ1W-ID / IA

OMRON

A wide range of basic input units.
[Features]
· ON/OFF signals from external equipment are uploaded into the PLC system and then applied to the CPU unit I/O memory.
· High speed input types available. Supports a wide variety of applications.
· 24 V DC, 100 V AC, and 200 V AC types are available. Can be connected to various types of digital output equipment.
· The 24 V DC type supports equipment with either NPN or PNP output.
· The digital filter in the unit can be set from 0 to 32 ms to reduce the influence of external noise.
[Applications]
· Combine with other units as needed.

From: ฿ 5,965.00
Special Price
Days to Ship: Same day

Same day

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Programmable Controller CP1L Expansion I/O Unit

Until 30/06/2024

Programmable Controller CP1L Expansion I/O Unit

OMRON

Programmable Controller CP1L Expansion I/O Unit

From: ฿ 4,167.00
Special Price
Days to Ship: Same day

Same day

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Until 30/06/2024

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.

From: ฿ 5,794.00
Special Price
Days to Ship: Same day

Same day

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NX Series Digital Input Unit NX-ID DC Input Unit

Until 31/03/2025

NX Series Digital Input Unit NX-ID DC Input Unit

OMRON

Digital input unit that is available in many variations, from high-speed types that enable high-speed synchronization control to general-purpose types

■ Features
· Can be mounted on an EtherCAT coupler to enable high-speed I/O refreshing
· Enables I/O refreshing synchronized with the controller control period (synchronous refresh)
· Using this unit in combination with an NX Series CPU Unit or EtherCAT Coupler Unit, an NX unit that uses a time-stamping input method,
and an NX unit that uses a time-specific output method enables highly precise I/O control that does not depend on the
controller's control period
· The use of a removable terminal block improves system maintainability
· The Push-In Plus terminal block (screwless clamp terminal block) and connector type (MIL connector / Fujitsu connector)
greatly reduce the time required for wiring work
· A unit width of only 12 mm realizes space saving (connector type 30 mm)
· 4-, 8-, 16- and 32-input-contact types are available, enabling the I/O configuration that best suits your equipment
· Connect to the CJ Series using the EtherNet/IP coupler

From: ฿ 4,457.00
Special Price
Days to Ship: Same day

Same day

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NX Series Digital Output Unit NX-OD Transistor Output Unit

Until 30/06/2024

NX Series Digital Output Unit NX-OD Transistor Output Unit

OMRON

Digital output unit that is available in many variations, from high-speed types that enable high-speed synchronization control to general-purpose types

■ Features
· Can be mounted on an EtherCAT coupler to enable high-speed I/O refreshing
· Enables I/O refreshing synchronized with the controller control period (synchronous refresh)
· Using this unit in combination with an NX Series CPU Unit or EtherCAT Coupler Unit, an NX unit that uses a time stamping input method,
and an NX unit that uses a time-specific output method enables highly precise I/O control that does not depend on the
controller's control period
· The use of a removable terminal block improves system maintainability
· The Push-In Plus terminal block (screwless clamp terminal block) and connector type (MIL connector / Fujitsu connector)
greatly reduce the time required for wiring work
· A unit width of only 12 mm realizes space saving (connector type 30 mm)
· 2-, 4-, 8-, 16- and 32-output-contact types are available, enabling the I/O configuration that best suits your equipment
· Connect to the CJ Series using the EtherNet/IP coupler

From: ฿ 4,516.00
Special Price
Days to Ship: Same day

Same day

Compare

Until 30/06/2024

I/O control unit I/O interface unit

OMRON

I/O Control Unit, I/O Interface Unit

From: ฿ 3,756.00
Special Price
Days to Ship: Same day

Same day

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Until 30/06/2024

SYSMAC CJ series CJ2M　pulse I/O block

OMRON

The CJ1M boasts improved basic performance and an increased programming capacity.
[Features]
· A maximum of 40 units can be connected per CPU.
· Equip pulse I/O modules to add position control functions to any CPU.
· Easy to connect to a PC using standard commercial grade USB cables.
· All models available with or without EtherNet/IP ports.
· Features a built-in serial port.
· Units for the CJ1 can be used as is.
[Applications]
· Used widely for positioning control.

From: ฿ 7,536.00
Special Price
Days to Ship: Same day

Same day

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Until 30/06/2024

CJ Series Input/Output Unit CJ1W-MD

OMRON

CJ Series Input/Output Unit CJ1W-MD

From: ฿ 12,855.00
Special Price
Days to Ship: Same day

Same day

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NX Series Incremental Encoder Input Unit NX-EC0□□□

Until 30/06/2024

NX Series Incremental Encoder Input Unit NX-EC0□□□

OMRON

Enables more precise timing control by synchronizing the encoder data with the time data

■ Features
· Open-collector-output type and line-driver-output type incremental encoders can be connected
· High-speed remote I/O control with communications cycle as fast as 125 μs*1
· Free-run refreshing, synchronous I/O refreshing, or
task period prioritized refreshing*2 with the NX1P2 CPU Unit or EtherCAT Coupler Unit
· The MC Function Module of the NJ/NX/NY5 Controllers allows the encoder
to be used as a motion axis
· Latching (1 internal signal and 2 input signals from external devices)
· Pulse period measurement
· 32-bit counters (80000000 to 7FFFFFFF HEX)
· Maximum counting rate: 4 MHz (Line receiver: 4 MHz; Open collector: 500 kHz)
· Time stamping
· Maximum and minimum counter value setting
· Connect to the CJ PLC using the EtherNet/IP coupler

*1 When using the NX-EC01□□ together with the NX701-□□□□ and NX-ECC203.
*2 Task period prioritized refreshing is available when the NX-ECC203 is used together.

From: ฿ 25,700.00
Special Price
Days to Ship: 5 Day(s)

5 Day(s)

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Until 30/06/2024

NX Series Safety I/O Unit NX-SI / SO

OMRON

Adds a Safety CPU Unit and Safety I/O Unit to an EtherCAT coupler to enable unified safety control

■ Features
· EN ISO 13849-1 (PLe / Safety Category 4), IEC 61508 (SIL3) certified
· Incorporating the Safety over EtherCAT (FSoE)* protocol enables both standard control and safety control on the same EtherCAT
· There are 2 types of Safety Input Unit: a 4-point type and an 8-point type, and 2 types of Safety Output Unit, a 2-point type and a 4-point type
· Safety units can be freely combined and placed with standard units

*The open protocol Safety over EtherCAT (abbreviated as FSoE; "FailSafe over EtherCAT") defines a
safety-related communication layer for EtherCAT.
Complies with the requirements of IEC 61508 (SIL3), enabling communication of safety data and standard data on the same communication system without
communication speed or cycle time restrictions.

From: ฿ 16,733.00
Special Price
Days to Ship: Same day

Same day

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Until 30/06/2024

CJ series high speed counter unit

OMRON

CJ Series High Speed Counter Unit

From: ฿ 29,150.00
Special Price
Days to Ship: Same day

Same day

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High Speed Counter Unit - CS1W-CT021/041

Until 30/06/2024

High Speed Counter Unit - CS1W-CT021/041

OMRON

High Speed Counter Unit CS1W-CT021 / 041

From: ฿ 47,075.00
Special Price
Days to Ship: 50 Day(s)

50 Day(s)

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NX Series Position Interface Pulse Output Unit NX-PG0□□□

Until 30/06/2024

NX Series Position Interface Pulse Output Unit NX-PG0□□□

OMRON

Positioning control with pulse outputs to command stepper motor drives and other pulse input motor drives

■ Features
· The MC Function Module of the NJ/NX/NY5 Controller allows you to
connect with as many axes as the NJ/NX/NY5 Controller can control
· High-speed remote I/O control with communications cycle as fast as 125 μs*1
· Multiple stepping motors and servo motors can be operated in synchronization by
using synchronous I/O refreshing or task period prioritized refreshing*2
· Latching (2 external latch inputs)
· Open collector pulse outputs up to 500 kHz
or line driver pulse outputs up to 4 MHz
· Line driver output models with 2 or 4 channels

*1 When using the NX-EC01□□ together with the NX701-□□□□ and NX-ECC203.
* *2 Task period prioritized refreshing is available when the NX-ECC203 is used together.

From: ฿ 23,043.00
Special Price
Days to Ship: 50 Day(s)

50 Day(s)

Compare

Until 30/06/2024

Interrupt Input Unit CJ1W-INT01

OMRON

Interrupt Input Unit CJ1W-INT01

From: ฿ 13,443.00
Special Price
Days to Ship: 5 Day(s)

5 Day(s)

Compare

Until 30/06/2024

CS1D series I/O interface unit

OMRON

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

From: ฿ 13,500.00
Special Price
Days to Ship: 5 Day(s)

5 Day(s)

Compare

NX Series Digital Input/Output Combined Unit NX-MD DC Input / Transistor Output Unit

Until 30/06/2024

NX Series Digital Input/Output Combined Unit NX-MD DC Input / Transistor Output Unit

OMRON

Digital input unit that is available in many variations, from high-speed types that enable high-speed synchronization control to general-purpose types

■ Features
· Can be mounted on an EtherCAT coupler to enable high-speed I/O refreshing
· Enables I/O refreshing synchronized with the controller control period (synchronous refresh)
· Using this unit in combination with an NX Series CPU Unit or EtherCAT Coupler Unit, an NX unit that uses a time-stamping input method,
and an NX unit that uses a time-specific output method enables highly precise I/O control that does not depend on the
controller's control period
· The use of a removable terminal block improves system maintainability
· The Push-In Plus terminal block (screwless clamp terminal block) and connector type (MIL connector / Fujitsu connector)
greatly reduce the time required for wiring work
· A unit width of only 12 mm realizes space saving (connector type 30 mm)
· Connect to the CJ Series using the EtherNet/IP coupler

From: ฿ 13,541.00
Special Price
Days to Ship: 3 Day(s)

3 Day(s)


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

	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 31/03/2025	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/06/2024
Brand	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON	OMRON
Product Series	CJ Series Output Unit CJ1W-OC / OA / OD	CJ Series Input Unit CJ1W-ID / IA	Programmable Controller CP1L Expansion I/O Unit	Input/Output Unit CS1W	NX Series Digital Input Unit NX-ID DC Input Unit	NX Series Digital Output Unit NX-OD Transistor Output Unit	I/O control unit I/O interface unit	SYSMAC CJ series CJ2M　pulse I/O block	CJ Series Input/Output Unit CJ1W-MD	NX Series Incremental Encoder Input Unit NX-EC0□□□	NX Series Safety I/O Unit NX-SI / SO	CJ series high speed counter unit	High Speed Counter Unit - CS1W-CT021/041	NX Series Position Interface Pulse Output Unit NX-PG0□□□	Interrupt Input Unit CJ1W-INT01	CS1D series I/O interface unit	NX Series Digital Input/Output Combined Unit NX-MD DC Input / Transistor Output Unit
From	฿ 4,443.00 Special Price On Sale Until 30/06/2024	฿ 5,965.00 Special Price On Sale Until 30/06/2024	฿ 4,167.00 Special Price On Sale Until 30/06/2024	฿ 5,794.00 Special Price On Sale Until 30/06/2024	฿ 4,457.00 Special Price On Sale Until 31/03/2025	฿ 4,516.00 Special Price On Sale Until 30/06/2024	฿ 3,756.00 Special Price On Sale Until 30/06/2024	฿ 7,536.00 Special Price On Sale Until 30/06/2024	฿ 12,855.00 Special Price On Sale Until 30/06/2024	฿ 25,700.00 Special Price On Sale Until 30/06/2024	฿ 16,733.00 Special Price On Sale Until 30/06/2024	฿ 29,150.00 Special Price On Sale Until 30/06/2024	฿ 47,075.00 Special Price On Sale Until 30/06/2024	฿ 23,043.00 Special Price On Sale Until 30/06/2024	฿ 13,443.00 Special Price On Sale Until 30/06/2024	฿ 13,500.00 Special Price On Sale Until 30/06/2024	฿ 13,541.00 Special Price On Sale Until 30/06/2024
Days to Ship	Same day	Same day	Same day	Same day	Same day	Same day	Same day	Same day	Same day	5 Day(s)	Same day	Same day	50 Day(s)	50 Day(s)	5 Day(s)	5 Day(s)	3 Day(s)
Number Of Inputs	-	8 ～ 64	8 ～ 12	16 ～ 96	4 ～ 32	-	1 ～ 8	10	16 ～ 32	-	8	-	-	-	16	-	16
Input Format	-	DC input / AC input	DC input	DC input / AC input / AC/DC input	-	-	DC input	-	DC input	Other	DC input	DC input	DC input	-	DC input	-	DC input
Rated Input Voltage(V)	-	24 ～ 200 to 240	-	24 ～ 200 to 240	12 to 24 ～ 24	-	12–24	-	5 ～ 24	-	DC24	-	-	-	24	-	24
Input answer time	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Number of Outputs	8 ～ 64	-	8	8 ～ 96	-	4 ～ 32	1	6	16 ～ 32	-	2 (test)	-	-	-	-	-	16
Output Format	Relay contact output / Triac output / Transistor / source output / Transistor / sync output	-	Relay contact output / Transistor / source output / Transistor / sync output	Relay contact output / Triac output / Transistor / source output / Transistor / sync output	-	Other	-	Transistor / sync output	Transistor / source output / Transistor / sync output	-	-	-	-	Other	-	-	Other
Rated load voltage(V)	-	-	-	-	-	-	5	-	-	-	-	-	-	-	-	-	-
Protection function	Output protection function	-	-	-	-	-	-	-	-	-	Other	-	-	-	-	-	-
Connection Terminal	Terminal Block / Connector	Terminal Block / Connector	Terminal Block	Terminal Block / Connector	-	Terminal Block / Connector	Terminal Block / Connector	Connector	Connector	Terminal Block	Terminal Block	Connector	Connector	-	Terminal Block	Connector	Connector
Representative Standard	UL	UL	UL	UL	UL	UL	UL	UL	UL	UL	UL	UL	UL	UL	UL	UL	UL

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.