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. 320-9143
Mfr. Part No.FX2N-48ER-ES/UL
BrandMitsubishi
$778.20
Each
units
FX2N Series 24 24 - - FX2N Series - - 100 → 240 V ac - I/O Module 90mm 150mm 87mm
RS Stock No. 492-963
Mfr. Part No.FX2N-2DA
BrandMitsubishi
$789.82
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. 320-9121
Mfr. Part No.FX2N-16EYR-ES/UL
BrandMitsubishi
$650.19
Each
units
FX2N Series - 16 - Relay FX2N Series - - 24 V dc - Output Module 90mm 40mm 87mm
RS Stock No. 320-9137
Mfr. Part No.FX2N-32ER-ES/UL
BrandMitsubishi
$544.10
Each
units
FX2N Series 16 16 - - FX2N Series - - 100 → 240 V ac - I/O Module 90mm 150mm 87mm
RS Stock No. 539-0774
Mfr. Part No.FX3U-4AD-TC-ADP
BrandMitsubishi
$521.24
Each
units
FX3U Series 4 - Analogue, J Type, K Type Digital, J Type, K Type FX3U Series - - 5 V dc, 24 V dc - Analogue Temperature Input Adapter 106mm 17.6mm 89.5mm
RS Stock No. 320-9115
Mfr. Part No.FX2N-16EYT-ESS/UL
BrandMitsubishi
$537.55
Each
units
FX2N Series 16 16 Analogue Transistor FX2N Series - - 24 V dc - Output Module 90mm 40mm 87mm
RS Stock No. 875-5694
Mfr. Part No.FX5-8EX/ES
BrandMitsubishi
$177.41
Each
units
FX5 8 - Sink, Source - FX5U CPU Module, FX5UC CPU Module - - - - Input 40mm 90mm 83mm
RS Stock No. 320-9109
Mfr. Part No.FX2N-16EX-ES/UL
BrandMitsubishi
$405.12
Each
units
FX2N Series 16 - Digital - FX2N Series - - 24 V dc - Input Module 90mm 40mm 87mm
RS Stock No. 135-9283
Mfr. Part No.FX5-C16EYT/DSS
BrandMitsubishi
$292.84
Each
units
FX5 - 16 - Transistor MELSEC iQ-F Series PLC 16 - 24 V dc 800 mA Output 20.1mm 90mm 87mm
RS Stock No. 135-9287
Mfr. Part No.FX5-32ET/DSS
BrandMitsubishi
$749.78
Each
units
FX5 16 16 DC Transistor MELSEC iQ-F Series PLC 32 - 24 V dc 1.6 A I/O Module 150mm 90mm 83mm
RS Stock No. 162-5695
Mfr. Part No.FX58AD
BrandMitsubishi
$1,035.04
Each
units
FX5 8 8 Analogue Digital FX5U CPU Module, FX5UC CPU Module 8 - 24 V dc 100 mA Digital output 50mm 102.2mm 90mm
RS Stock No. 135-9284
Mfr. Part No.FX5-C32EYT/DSS
BrandMitsubishi
$454.41
Each
units
FX5 - 32 - Transistor MELSEC iQ-F Series PLC 32 - 24 V dc 800 mA Output 20.1mm 90mm 87mm
RS Stock No. 455-6945
Mfr. Part No.QY81P
BrandMitsubishi
$953.04
Each
units
MELSEC Q - 32 - Digital, Transistor MELSEC Q Series 32 - 12 → 24 V dc - - 98mm 27.4mm 90mm
RS Stock No. 539-0960
Mfr. Part No.FX3U-ENET
BrandMitsubishi
$1,270.04
Each
units
FX3U Series - - - - FX3U Series 8 - 24 V dc - Ethernet Communications Module 90mm 55mm 87mm
RS Stock No. 135-9288
Mfr. Part No.FX5-C32ET/DSS
BrandMitsubishi
$454.41
Each
units
FX5 16 16 DC Transistor MELSEC iQ-F Series PLC 32 - 24 V dc 800 mA I/O Module 20.1mm 90mm 87mm
RS Stock No. 875-5701
Mfr. Part No.FX5-16EX/ES
BrandMitsubishi
$296.28
Each
units
FX5 16 - Sink, Source - FX5U CPU Module, FX5UC CPU Module - - - - Input 40mm 90mm 83mm
RS Stock No. 875-5717
Mfr. Part No.FX5-32ER/ES
BrandMitsubishi
$633.14
Each
units
FX5 16 16 Sink, Source Relay, Transistor FX5U CPU Module, FX5UC CPU Module - - 100 → 240 V ac - I/O Module 150mm 90mm 83mm
RS Stock No. 539-0954
Mfr. Part No.FX3U-64DP-M
BrandMitsubishi
$1,577.48
Each
units
FX3U Series - - - - FX3U Series 8 - 24 V dc - Master PROFIBUS/DP Communications Module 90mm 43mm 87mm
RS Stock No. 135-9285
Mfr. Part No.FX5-16ET/ESS-H
BrandMitsubishi
$605.88
Each
units
FX5 8 8 DC Transistor MELSEC iQ-F Series PLC 16 - 24 V dc 1.6 A I/O Module 40mm 90mm 83mm
RS Stock No. 455-6951
Mfr. Part No.Q64AD
BrandMitsubishi
$700.12
Each
units
MELSEC Q 4 (Channel) 4 Analogue - MELSEC Q Series - - 5 V dc - Analogue Digital Converter 98mm 27.4mm 90.17mm