PLC I/O Modules

PLC I/O modules are one of the three core components that operate a programmable logic controller. I/O refers to input/output. PLC I/O modules act as messengers between a processor and an I/O device.

How do PLC I/O modules work?

PLC I/O modules assist the data exchange between an external device and computer memory. Their main job is to process communication to the PLC and accept commands sent from a processor. They can also detect errors, run status reports and co-ordinate a timely flow of data.

Types of PLC I/O modules

The type of PLC I/O modules used by a programmable logic controller depends on the type of input device. These are categorised as input or output types. Some PLCs respond to digital inputs and outputs, whereas others respond to analog signals. Digital inputs are either on or off, and analog signals process conditions as voltage. Other types include discrete, speciality and communication modules. Smaller PLCs are usually designed with fixed I/O points.


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Description Price Manufacturer Series Number of Inputs Number of Outputs Input Type Output Type For Use With Number of I/O Interface Voltage Category Output Current Module Type Length Width Depth
RS Stock No. 806-7048
Mfr. Part No.TM3AQ4G
TWD7,060.00
Each
units
TM3 Series - 4 - Current, Voltage Modicon M221, Modicon M241, Modicon M251 - - -10 → 10 V dc 0 → 20 mA - 90mm 23.6mm 70mm
RS Stock No. 806-7039
Mfr. Part No.TM3AI8G
TWD8,814.00
Each
units
TM3 Series 8 - Current, Voltage - Modicon M221, Modicon M241, Modicon M251 - - -10 → 10 V dc - - 90mm 23.6mm 70mm
RS Stock No. 510-1417
Mfr. Part No.CJ1W-AD081
BrandOmron
TWD29,386.00
Each
units
SYSMAC CJ Series, SYSMAC CP1H, SYSMAC CP1L 8 - Analogue - SYSMAC CJ Series, SYSMAC CP1H Series, SYSMAC CP1L Series 8 - -10 → 10 V, 0 → 10 V, 0 → 5 V, 1 → 5 V - - 90mm 31mm 65mm
RS Stock No. 623-7680
Mfr. Part No.VBA-4E3A-KE-ZE/R
TWD6,151.00
Each
units
- 4 3 - - - 7 - 21 → 31 V dc - - 102mm 22.5mm 99mm
RS Stock No. 806-7020
Mfr. Part No.TM3AI8
TWD8,814.00
Each
units
TM3 Series 8 - Current, Voltage - Modicon M221, Modicon M241, Modicon M251 - - -10 → 10 V dc - - 90mm 23.6mm 70mm
RS Stock No. 662-3494
Mfr. Part No.6ES7132-4BD02-0AA0
BrandSiemens
TWD1,680.00
Each
units
SIMATIC ET 200S - 4 - Digital SIMATIC ET 200S Series 4 - 24 V dc 500 mA - 81mm 15mm 52mm
RS Stock No. 736-1444
Mfr. Part No.LAN module
BrandGrasslin
TWD12,941.00
Each
units
- - - - - Talento 892 - - - - Lan Module - - -
RS Stock No. 320-9171
Mfr. Part No.FX2N-1HC
BrandMitsubishi
TWD16,132.00
Each
units
FX2N 8 2 Encoder Transistor MELSEC FX2N Series 8/2 - 5 → 24 V dc 500 mA - 90mm 55mm 87mm
RS Stock No. 662-3621
Mfr. Part No.6ES7138-4CB11-0AB0
BrandSiemens
TWD1,754.00
Each
units
ET200S - - - Current, Potential, Voltage ET200S Series - - 24 → 230 V ac, 24 → 48 V dc - Power Module 81mm 15mm 52mm
RS Stock No. 806-6963
Mfr. Part No.TM3DQ8TG
TWD3,508.00
Each
units
TM3 Series - 8 - Source, Transistor Modicon M221, Modicon M241, Modicon M251 - - 24 V 500 mA - 90mm 23.6mm 70mm
RS Stock No. 667-9251
Mfr. Part No.750-530
BrandWago
TWD2,524.00
Each
units
I/O SYSTEM 750 - 8 (Channel) - Digital 750 Series - - 24 V dc - Output Module 100mm 12mm 64mm
RS Stock No. 875-5705
Mfr. Part No.FX5-16EYR/ES
BrandMitsubishi
TWD9,084.00
Each
units
FX5 - 16 - Relay, Transistor FX5U CPU Module, FX5UC CPU Module - - - - Output 40mm 90mm 83mm
RS Stock No. 806-7054
Mfr. Part No.TM3TM3
TWD8,814.00
Each
units
TM3 Series 2 1 Current, Temperature, Voltage Current, Voltage Modicon M221, Modicon M241, Modicon M251 3 - -10 → 10 V dc 0 → 20 mA - 90mm 23.6mm 70mm
RS Stock No. 667-9245
Mfr. Part No.750-469/003-000
BrandWago
TWD9,502.00
Each
units
I/O SYSTEM 750 2 (Channel) - Analogue - 750 Series - - - - Input Module 100mm 12mm 64mm
RS Stock No. 612-9084
Mfr. Part No.6ES7334-0CE01-0AA0
BrandSiemens
TWD18,527.00
Each
units
SIMATIC S7-300 Series 4 2 Analogue Analogue SIMATIC S7-300 Series 6 - 24 V dc - - 125mm 40mm 120mm
RS Stock No. 806-7014
Mfr. Part No.TM3AI2HG
TWD5,891.00
Each
units
TM3 Series 2 - Current, Voltage - Modicon M221, Modicon M241, Modicon M251 - - -10 → 10 V dc - - 90mm 23.6mm 70mm
RS Stock No. 320-9121
Mfr. Part No.FX2N-16EYR-ES/UL
BrandMitsubishi
TWD9,084.00
Each
units
FX2N Series - 16 - Relay FX2N Series - - 24 V dc - Output Module 90mm 40mm 87mm
RS Stock No. 806-6966
Mfr. Part No.TM3DQ16T
TWD5,666.00
Each
units
TM3 Series - 16 - Source, Transistor Modicon M221, Modicon M241, Modicon M251 - - 24 V 500 mA - 90mm 23.6mm 70mm
RS Stock No. 806-7001
Mfr. Part No.TM3DQ16UG
TWD5,984.00
Each
units
TM3 Series - 16 - Transistor Modicon M221, Modicon M241, Modicon M251 - - 24 V 500 mA - 90mm 23.6mm 70mm
RS Stock No. 806-6948
Mfr. Part No.TM3DQ8RG
TWD4,137.00
Each
units
TM3 Series - 8 - Relay Modicon M221, Modicon M241, Modicon M251 - - 24 → 240 V 2 A - 90mm 23.6mm 70mm