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. 710-6341
Mfr. Part No.2313643
$1,933.17
Each
units
PSI-MODEM-SHDSL/ETH - - - - - - - 28 V dc, 240 V ac - - 86mm 12.3mm 96mm
RS Stock No. 806-6900
Mfr. Part No.TMC2CONV01
$250.28
Each
units
Modicon M221 2 - Analogue Current Modicon M221 - - 24 V dc 20 mA - - - -
RS Stock No. 124-3336
Mfr. Part No.2702291
$490.65
Each
units
AXL F DI16/1 DO8/2-2A 2H 16 (Digital) 8 (Digital) Digital Digital Axioline F Station 24 - 11 → 30 V dc 2 (Per Channel) A I/O Module 35mm 54mm 129.9mm
RS Stock No. 818-4241
Mfr. Part No.CJ1WMD232
BrandOmron
$669.43
Each
units
CJ1W-MD 16 16 Voltage Transistor CJ/NJ Controllers 16 (Input), 16 (Output) - 24 V dc 500 mA - 95.4mm 31mm 83.6mm
RS Stock No. 510-1710
Mfr. Part No.CJ1W-AD041
BrandOmron
$1,084.67
Each
units
SYSMAC CJ Series, SYSMAC CP1H, SYSMAC CP1L 4 - Analogue - SYSMAC CJ Series, SYSMAC CP1H Series, SYSMAC CP1L Series 4 - 0 → 10 V, 0 → 5 V, 1 → 5 V, -10 → 10 V - - 90mm 31mm 65mm
RS Stock No. 736-1444
Mfr. Part No.LAN module
BrandGrasslin
$739.96
Each
units
- - - - - Talento 892 - - - - Lan Module - - -
RS Stock No. 893-6718
Mfr. Part No.1506920000
BrandWeidmuller
$362.81
Each
units
- 4 - Analogue Voltage - - 4 - 0 → 10 V, 0 → 5 V, 1 → 5 V, -10 → 10 V, 2 → 10 V - Analogue Input 120mm 11.5mm 76mm
RS Stock No. 492-963
Mfr. Part No.FX2N-2DA
BrandMitsubishi
$718.02
Each
units
FX1N Series, FX3G Series, FX3U Series - 2 - Analogue FX1N Series, FX3G Series, FX3U Series 2 - 5 V dc, 24 V dc 4 → 20 mA - 90mm 55mm 87mm
RS Stock No. 806-6932
Mfr. Part No.TM3DI16K
$209.87
Each
units
TM3 Series 16 - - - Modicon M221, Modicon M241, Modicon M251 - - 24 V - - 90mm 17.6mm 70mm
RS Stock No. 806-6938
Mfr. Part No.TM3DI16G
$255.85
Each
units
TM3 Series 16 - - - Modicon M221, Modicon M241, Modicon M251 - - 24 V - - 90mm 23.6mm 70mm
RS Stock No. 828-5265
Mfr. Part No.6GK5308-2FL10-2AA3
BrandSiemens
$4,456.46
Each
units
6GK5308 - - Current, Voltage Current, Voltage - - - 24 V dc 100 mA - 125mm 120mm 123mm
RS Stock No. 893-0625
Mfr. Part No.1334920000
BrandWeidmuller
$577.39
Each
units
u-remote - - - - Remote I/O - - - - Fieldbus Coupler 52mm 76mm 120mm
RS Stock No. 320-9121
Mfr. Part No.FX2N-16EYR-ES/UL
BrandMitsubishi
$591.08
Each
units
FX2N Series - 16 - Relay FX2N Series - - 24 V dc - Output Module 90mm 40mm 87mm
RS Stock No. 667-9239
Mfr. Part No.750-431
BrandWago
$126.46
Each
units
I/O SYSTEM 750 8 (Channel) - Digital - 750 Series - - 24 V dc - Input Module 100mm 12mm 64mm
RS Stock No. 893-7834
Mfr. Part No.2701956
$1,923.15
Each
units
IB STME 24 BAI 8/EF 8 - Analogue Voltage - - 8 - 0 → 50 V dc - Analogue Input 118mm 116mm 117mm
RS Stock No. 508-3892
Mfr. Part No.750402
BrandWago
$103.92
Each
units
I/O SYSTEM 750 4 (Channel) - Digital - 750 Series - - 24 V dc - Input Module 100mm 12mm 64mm
RS Stock No. 875-5701
Mfr. Part No.FX5-16EX/ES
BrandMitsubishi
$362.98
Each
units
FX5 16 - Sink, Source - FX5U CPU Module, FX5UC CPU Module - - - - Input 40mm 90mm 83mm
RS Stock No. 746-6564
Mfr. Part No.6ES7321-7BH01-0AB0
BrandSiemens
$747.38
Each
units
- 16 - Digital - S7-300 Series - - 24 V dc - Input 125mm 40mm 120mm
RS Stock No. 787-7955
Mfr. Part No.6ES7222-1HH32-0XB0
BrandSiemens
$365.42
Each
units
SM 1222 - 16 Digital Digital SIMATIC S7-1200 Series - - 24 V dc 2 A - 100mm 45mm 75mm
RS Stock No. 662-3687
Mfr. Part No.6ES7193-4CD20-0AA0
BrandSiemens
$18.20
Each
units
- - - - - ET200S Series 6 - - - - 132mm 15mm 43mm
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