PLC I/O Units

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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Number of inputs
Input format
Rated input voltage(V)
Input answer time
Number of output points
Output format
Rated load voltage(V)
Protection function
Connection terminal
Representative standards

    MELSEC-F Input/Output Expansion Block (Mitsubishi Electric Automation)

      iQ-R Series Input/Output Unit (Mitsubishi Electric Automation)

        MELSEC iQ-FX5 Series Input/Output Unit (Mitsubishi Electric Automation)

          CC-Link Remote I/O Unit, DC input, Terminal Block

            MELSEC-F Series Input/Output Expansion Unit (Mitsubishi Electric Automation)

              NX Series Digital Input Unit NX-ID DC Input Unit (OMRON)

                MELSEC iQ-F Series I/O Unit, Spring Clamp Terminal Block (Mitsubishi Electric Automation)

                  MELSEC-Q Output Unit (Mitsubishi Electric Automation)

                  • On Sale Until 12/22/2021

                  Programmable Controller CP1L Expansion I/O Unit

                    CC-Link Remote I/O Unit (DC input / contact output) Terminal Block

                      CC-Link Small Remote I/O Unit (transistor output) Terminal Block

                        SYSMAC CJ series   CJ2M pulse I/O block

                          L Series Output Unit (Mitsubishi Electric Automation)

                            MELSEC-QS Series CC-Link Safety Input/Output (Mitsubishi Electric Automation)

                              CC-Link Digital-to-Analog Conversion Unit, Screw Terminal Block Type (Mitsubishi Electric Automation)

                                NX Series Safety I/O Unit NX-SI / SO (OMRON)

                                  MELSEC-Q series input unit (DC plus common)

                                    CJ Series Input Unit CJ1W-ID / IA (OMRON)

                                      CC-Link IE Field Network, Block Type Remote Unit NZ2GF Series

                                        MELSEC-Q series analog input/output unit

                                          MELSEC-Q Series Input Unit (DC minus common) (Mitsubishi Electric Automation)

                                            NX Series Digital Output Unit NX-OD Transistor Output Unit (OMRON)

                                              MELSEC-L Series Output Unit (Mitsubishi Electric Automation)

                                                MELSEC-Q Series Analog Output Unit

                                                  MELSEC-Q Series Input Unit (AC) (Mitsubishi Electric Automation)

                                                    MELSEC-Q Series Input Unit (DC sensor) (Mitsubishi Electric Automation)

                                                      Input/Output Unit CS1W (OMRON)

                                                        MELSEC-F Series Input Expansion Board (Mitsubishi Electric Automation)

                                                          CJ Series Output Unit CJ1W-OC / OA / OD (OMRON)

                                                            MELSEC-L Series Input Unit

                                                              MELSEC-Q Series Inter-Channel Insulation Pulse Input Unit (Mitsubishi Electric Automation)

                                                                CJ series high speed counter unit (OMRON)

                                                                  CJ Series Input/Output Unit CJ1W-MD (OMRON)

                                                                    Incremental Encoder Input Unit - NX Series, NX-EC0*** (OMRON)

                                                                      MELSEC-F series analog input/output

                                                                        MELSEC-Q Series Interrupt Input Unit (Mitsubishi Electric Automation)

                                                                          I/O control unit I/O interface unit (OMRON)

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

                                                                              CC-Link/LT I/O Unit (Inputs)

                                                                                MELSEC-Q series large input unit (AC)

                                                                                  CC-Link/LT I/O Unit (I/O)

                                                                                    MELSEC-Q Series I/O Unit

                                                                                      CC-Link/LT I/O Unit (Output)

                                                                                        MELSEC-Q series input unit (DC/AC)

                                                                                          C Series C500 CompoNet Slave (OMRON)

                                                                                          Brand

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          OMRON

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          OMRON

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          OMRON

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          OMRON

                                                                                          Mitsubishi Electric Automation

                                                                                          OMRON

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          OMRON

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          OMRON

                                                                                          Mitsubishi Electric Automation

                                                                                          OMRON

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          OMRON

                                                                                          OMRON

                                                                                          OMRON

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          OMRON

                                                                                          OMRON

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          Mitsubishi Electric Automation

                                                                                          OMRON

                                                                                          Product Series

                                                                                          MELSEC-F Input/Output Expansion Block (Mitsubishi Electric Automation)

                                                                                          iQ-R Series Input/Output Unit (Mitsubishi Electric Automation)

                                                                                          MELSEC iQ-FX5 Series Input/Output Unit (Mitsubishi Electric Automation)

                                                                                          CC-Link Remote I/O Unit, DC input, Terminal Block

                                                                                          MELSEC-F Series Input/Output Expansion Unit (Mitsubishi Electric Automation)

                                                                                          NX Series Digital Input Unit NX-ID DC Input Unit (OMRON)

                                                                                          MELSEC iQ-F Series I/O Unit, Spring Clamp Terminal Block (Mitsubishi Electric Automation)

                                                                                          MELSEC-Q Output Unit (Mitsubishi Electric Automation)

                                                                                          Programmable Controller CP1L Expansion I/O Unit

                                                                                          CC-Link Remote I/O Unit (DC input / contact output) Terminal Block

                                                                                          CC-Link Small Remote I/O Unit (transistor output) Terminal Block

                                                                                          SYSMAC CJ series CJ2M pulse I/O block

                                                                                          L Series Output Unit (Mitsubishi Electric Automation)

                                                                                          MELSEC-QS Series CC-Link Safety Input/Output (Mitsubishi Electric Automation)

                                                                                          CC-Link Digital-to-Analog Conversion Unit, Screw Terminal Block Type (Mitsubishi Electric Automation)

                                                                                          NX Series Safety I/O Unit NX-SI / SO (OMRON)

                                                                                          MELSEC-Q series input unit (DC plus common)

                                                                                          CJ Series Input Unit CJ1W-ID / IA (OMRON)

                                                                                          CC-Link IE Field Network, Block Type Remote Unit NZ2GF Series

                                                                                          MELSEC-Q series analog input/output unit

                                                                                          MELSEC-Q Series Input Unit (DC minus common) (Mitsubishi Electric Automation)

                                                                                          NX Series Digital Output Unit NX-OD Transistor Output Unit (OMRON)

                                                                                          MELSEC-L Series Output Unit (Mitsubishi Electric Automation)

                                                                                          MELSEC-Q Series Analog Output Unit

                                                                                          MELSEC-Q Series Input Unit (AC) (Mitsubishi Electric Automation)

                                                                                          MELSEC-Q Series Input Unit (DC sensor) (Mitsubishi Electric Automation)

                                                                                          Input/Output Unit CS1W (OMRON)

                                                                                          MELSEC-F Series Input Expansion Board (Mitsubishi Electric Automation)

                                                                                          CJ Series Output Unit CJ1W-OC / OA / OD (OMRON)

                                                                                          MELSEC-L Series Input Unit

                                                                                          MELSEC-Q Series Inter-Channel Insulation Pulse Input Unit (Mitsubishi Electric Automation)

                                                                                          CJ series high speed counter unit (OMRON)

                                                                                          CJ Series Input/Output Unit CJ1W-MD (OMRON)

                                                                                          Incremental Encoder Input Unit - NX Series, NX-EC0*** (OMRON)

                                                                                          MELSEC-F series analog input/output

                                                                                          MELSEC-Q Series Interrupt Input Unit (Mitsubishi Electric Automation)

                                                                                          I/O control unit I/O interface unit (OMRON)

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

                                                                                          CC-Link/LT I/O Unit (Inputs)

                                                                                          MELSEC-Q series large input unit (AC)

                                                                                          CC-Link/LT I/O Unit (I/O)

                                                                                          MELSEC-Q Series I/O Unit

                                                                                          CC-Link/LT I/O Unit (Output)

                                                                                          MELSEC-Q series input unit (DC/AC)

                                                                                          C Series C500 CompoNet Slave (OMRON)

                                                                                          CAD
                                                                                          Days to Ship 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days Same Day

                                                                                          Stock Items Included

                                                                                          4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days Same Day

                                                                                          Stock Items Included

                                                                                          4 Days 22 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days 4 Days Quote 4 Days 12 Days 4 Days 12 Days Quote 4 Days
                                                                                          Number of inputsNANA--NA4 ~ 32--8 ~ 24--10NA--4-8 ~ 64--------16 ~ 96NA----16 ~ 32--168162 ~ 16-1 ~ 8---32
                                                                                          Input format-----DC inputDC input--------DC input-DC input / AC inputDC input-------DC input / AC input / AC/DC input----DC inputDC inputOther--DC inputDC input------DC input
                                                                                          Rated input voltage(V)DC24V ~ NADC5 ~ AC100 to 240-10 to +10 DCDC5V ~ AC100 to 120VDC24V ~ (Not applicable)12 to 24 ~ 24DC5/24-----(Not applicable)--DC24DC524 ~ 200 to 24024-DC5---AC100 to 2405 DC / 12 DC24 ~ 200 to 240DC24V ~ (Not applicable)-20.4 to 28.8 DC--5 ~ 24--DC2412 to 2424DC24V200 to 240 ACDC24V--48 DC / 48 AC12 to 24 ~ 24
                                                                                          Input answer time------Less than 1 mS / Less than 10 to 20 mS-----------Less than 50 to 100 mS--------------------------
                                                                                          Number of output points0 ~ NANA--24 ~ NA---8 ~ 32--6---2 ~ 4-----2 ~ 32----8 ~ 962 ~ NA8 ~ 64---16 ~ 32----16--1 ~ 87--32
                                                                                          Output formatRelay contact output / Triac output / Transistor / source output / Transistor / sync output / OtherRelay contact output / Triac output / Transistor / source output / Transistor / sync output / OtherTransistor / sync output-Relay contact output / Transistor / source output-Relay contact output / Transistor / source output / Transistor / sync outputTransistor / sync outputRelay contact output / Transistor / source output / Transistor / sync output--Transistor / sync outputRelay contact output / Triac output / Transistor / source output / Transistor / sync output--Transistor / source output-----Other----Relay contact output / Triac output / Transistor / source output / Transistor / sync outputOtherRelay contact output / Triac output / Transistor / source output / Transistor / sync output---Transistor / source output / Transistor / sync output----Other------Relay contact output
                                                                                          Rated load voltage(V)-DC5 to 24 ~ DC24V-----5 to 12 DC ~ 240 AC-12/24 V DC ~ 24 V DC / 240 V AC------------------------------DC12/24V ~ AC250V/DC30VDC12 to 2412/24 V DC ~ 250 V AC / 30 V DC--
                                                                                          Protection function------None--------Other--None---------Output protection function-----------Output protection function----
                                                                                          Connection terminal--Terminal block/connector--Terminal block / ConnectorEurope terminal block-Terminal block--Connector---Terminal block-Terminal block / ConnectorTerminal block--Terminal block / Connector----Terminal block / Connector-Terminal block / Connector--ConnectorConnectorTerminal block--Terminal block / ConnectorConnector------Terminal block
                                                                                          Representative standardsCE / UL / CULCE / UL / CULCE / UL / CULCE / ULCE / UL / CULCE / UL / CUL / CSACE / UL / CUL / OtherCE / ULCE / UL / CSACE / ULCE / ULCE / UL / CUL / CSA-CE / UL / CULULCE / UL / CUL / TUVCE / ULCE / UL / CUL / CSA-CE / ULCE / ULCE / UL / CUL / CSAUL / CULCE / ULCE / ULCE / ULCE / UL / CUL / CSACECE / UL / CUL / CSACE / UL-CE / UL / CUL / CSACE / UL / CUL / CSACE / UL / CUL / CSACE-CE / UL / CUL / CSACE / UL / CUL / CSA-CE-CE / ULCE / ULCE / UL-

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