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. 901-0817
Mfr. Part No.2903806
€571.62
Each
units
TC MOBILE I/O X200 AC 4 4 Digital Relay PSI Modem SMS Relay 8 - 125 V dc, 250 V ac 5 A Digital 71.6mm 62.2mm 89.7mm
RS Stock No. 901-0826
Mfr. Part No.2903805
€590.47
Each
units
TC MOBILE I/O X200 2 4 Analogue, Digital Relay PSI Modem SMS Relay 6 - 0 → 60 V dc 6 A Analogue, Digital 71.6mm 62.2mm 89.7mm
RS Stock No. 893-7846
Mfr. Part No.2701954
€1,183.64
Each
units
IB STME 24 AO 4/EF - 4 - Analogue - 4 - 0 → 10 V dc, -10 → 10 V dc 0 → 20 mA, 4 → 20 mA Analogue Output 118mm 116mm 117mm
RS Stock No. 764-6256
Mfr. Part No.2901535
€308.18
Each
units
RAD-DI4-IFS 4 - Digital Digital RAD-2400-IFS Wireless Module - - 19.2 → 30.5 V dc - - 99mm 17.5mm 114.5mm
RS Stock No. 124-3347
Mfr. Part No.2904909
€805.70
Each
units
RAD-868-IFS - 1 (Analogue), 1 (Digital) - Analogue, Digital Large System & Networks 14 - 0 → 3 V 500 mA Wireless I/O Module 17.5mm 99mm 114.5mm
RS Stock No. 893-7843
Mfr. Part No.2700839
€1,234.86
Each
units
IB ST 24 AO 4/EF - 4 - Analogue - 4 - 0 → 10 V dc, -10 → 10 V dc 0 → 20 mA, 4 → 20 mA Analogue Output 118mm 116mm 117mm
RS Stock No. 696-2119
Mfr. Part No.2313452
€672.96
Each
units
FL COMSERVER UNI 232/422/485 - - - - - - - 28 V dc, 240 V ac - - 86mm 12.3mm 96mm
RS Stock No. 124-3350
Mfr. Part No.2906596
€118.00
Each
units
VIP/S/MC/BASE 1-8/L/EX - - - - - 8 - - - Base Module 118.1mm 102.7mm 72.2mm
RS Stock No. 764-6265
Mfr. Part No.2901536
€376.13
Each
units
RAD-DOR4-IFS - 4 Digital Digital, Relay RAD-2400-IFS Wireless Module - - 19.2 → 30.5 V dc 6 A - 99mm 17.5mm 114.5mm
RS Stock No. 528-0576
Mfr. Part No.2862385
€367.68
Each
units
ILB IB 24 DI16 DO16 16 16 Digital Digital INTERBUS 32 - 24 V dc 500 mA - 140.5mm 156mm 57mm
RS Stock No. 855-1455
Mfr. Part No.2897253
€603.16
1 Box of 4
Box(es)
IB IL 24 DO 16-ME - 16 - Digital - - - - 8 A - 119.8mm 48.8mm 71.5mm
RS Stock No. 855-1464
Mfr. Part No.2897910
€411.66
Each
units
IB IL DALI-PAC - - - - - - - - - - 119.8mm 12.2mm 71.5mm
RS Stock No. 855-3344
Mfr. Part No.2701214
€65.35
Each
units
IB IL 24/48 DOR 2/W-XC-PAC - 2 - Relay - - - - 4 A - 119.8mm 12.2mm 71.5mm
New
RS Stock No. 201-5377
Mfr. Part No.2702071
€189.62
Each
units
Axioline F 8 8 Digital Digital - - - 24 V dc 500 mA - - - -
RS Stock No. 855-3350
Mfr. Part No.2701215
€489.75
Each
units
IB IL AI 4/EF-XC-PAC 4 - Analogue - - - - 24 V dc - - 136.8mm 48.8mm 71.5mm
RS Stock No. 855-3265
Mfr. Part No.2692898
€256.28
Each
units
IB IL 24 DO 32/HD-2MBD-PAC - - - - - - - - - - 119.8mm 48.8mm 71.5mm
New
RS Stock No. 201-5378
Mfr. Part No.2702525
€567.54
Each
units
AXL F 8 dedicated - Analogue - - - - 5 V dc 20 mA - - - -
RS Stock No. 855-3381
Mfr. Part No.2727365
€255.22
Each
units
IB IL 400 MLR 1-8A 2 - - Motor - - - 187 → 600 V ac - - 224mm 63mm 109mm
RS Stock No. 855-3467
Mfr. Part No.2861470
€45.36
Each
units
IB IL 24 DO 2-PAC - 2 - Digital - - - - 1 A - 119.8mm 12.2mm 71.5mm
RS Stock No. 855-3353
Mfr. Part No.2701216
€307.27
Each
units
IB IL TEMP 2 UTH-XC-PAC 2 - Analogue - - - - 24 V dc - - 136.8mm 12.2mm 71.5mm