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. 855-3486
Mfr. Part No.2861768
TWD13,353.00
Each
units
IB IL IMPULSE-IN-PAC - - - - - - - - - - 135mm 12.2mm 71.5mm
RS Stock No. 124-3336
Mfr. Part No.2702291
TWD9,939.00
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. 855-1436
Mfr. Part No.2878641
TWD15,500.00
Each
units
IB IL AI 4/EF-2MBD-PAC 4 - Analogue - - - - 24 V dc - - 136.8mm 48.8mm 71.5mm
RS Stock No. 855-1455
Mfr. Part No.2897253
TWD17,590.00
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. 283-6429
Mfr. Part No.2799364
TWD3,405.00
Each
units
PSM PTK-4 - - - - - - - 28 V dc, 240 V ac - - 86mm 12.3mm 96mm
RS Stock No. 855-3515
Mfr. Part No.2862084
TWD10,350.00
Each
units
IB IL RS 232-2MBD-PAC - - - - - - - 19.2 30 V dc - - 136.8mm 24.4mm 71.5mm
RS Stock No. 855-3329
Mfr. Part No.2701164
TWD15,550.00
Each
units
IB IL AO 4/8/U/BP-XC-PAC - 8 - Analogue - - - - - - 136.8mm 48.8mm 71.5mm
RS Stock No. 528-0453
Mfr. Part No.2862343
TWD11,932.00
Each
units
ILB IB 24 DI32 32 - Digital - INTERBUS 32 - 24 V dc - - 140.5mm 156mm 57mm
RS Stock No. 124-3347
Mfr. Part No.2904909
TWD28,255.00
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. 855-1468
Mfr. Part No.2897952
TWD11,000.00
Each
units
IB IL AI/TEMP 4 RTD-PAC - - - - - - - - - - 140.5mm 12.2mm 71.5mm
RS Stock No. 855-3307
Mfr. Part No.2701156
TWD7,703.00
Each
units
IB IL 24 DO 16-XC-PAC - 16 - Digital - - - - 8 A - 140.5mm 48.8mm 71.5mm
RS Stock No. 124-3352
Mfr. Part No.2906599
TWD508.00
Each
units
IOA AI/AO/BFI/DS/0.5A/EX 1 (Analogue) 1 (Analogue) Analogue Analogue Field Devices 2 - - - I/O Module 10.3mm 64.2mm 72.9mm
RS Stock No. 855-3448
Mfr. Part No.2861357
TWD9,483.00
Each
units
IB IL RS 232-PAC - - - - - - - 19.2 30 V dc - - 136.8mm 24.4mm 71.5mm
RS Stock No. 855-3397
Mfr. Part No.2737009
TWD3,323.00
Each
units
IB IL 24 FLM MULTI-PAC - - - - - - - - - - 136.8mm 12.2mm 71.5mm
RS Stock No. 855-3357
Mfr. Part No.2701217
TWD9,950.00
Each
units
IB IL TEMP 2 RTD-XC-PAC 2 - Analogue - - - - 24 V dc - - - - -
RS Stock No. 855-3344
Mfr. Part No.2701214
TWD2,200.00
Each
units
IB IL 24/48 DOR 2/W-XC-PAC - 2 - Relay - - - - 4 A - 119.8mm 12.2mm 71.5mm
RS Stock No. 855-3265
Mfr. Part No.2692898
TWD8,720.00
Each
units
IB IL 24 DO 32/HD-2MBD-PAC - - - - - - - - - - 119.8mm 48.8mm 71.5mm
RS Stock No. 855-3509
Mfr. Part No.2861988
TWD4,159.00
Each
units
IB IL 24 DO 4-2MBD-PAC - 4 - Digital - - - - 2 A - 140.5mm 12.2mm 71.5mm
RS Stock No. 855-1449
Mfr. Part No.2878971
TWD3,255.00
Each
units
IB IL 230 PWR IN/F-D-PAC - - - - - - - 207 → 253 V ac - - 119.8mm 36.6mm 71.5mm
RS Stock No. 124-3349
Mfr. Part No.2906595
TWD3,897.00
Each
units
VIP/S/D25M/BASE 1-8/L/C/EX - - - - Foxboro I/A Series DCS 8 - - - Base Module 118.1mm 102.7mm 72.2mm