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. 612-9084
Mfr. Part No.6ES7334-0CE01-0AA0
BrandSiemens
HK$4,713.28
Each
units
SIMATIC S7-300 Series 4 2 Analogue Analogue SIMATIC S7-300 Series 6 - 24 V dc - - 125mm 40mm 120mm
RS Stock No. 453-2624
Mfr. Part No.6ES7322-1BL00-0AA0
BrandSiemens
HK$5,548.40
Each
units
SIMATIC S7-300 Series - 32 - Digital S7-300 Series 32 - 20.4 → 28.8 V dc 500 mA - 125mm 40mm 120mm
RS Stock No. 855-1455
Mfr. Part No.2897253
HK$6,367.09
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. 453-2517
Mfr. Part No.6ES7321-1BH02-0AA0
BrandSiemens
HK$2,011.52
Each
units
SIMATIC S7-300 Series 16 - Digital - SIMATIC S7-300 Series 16 - 20.4 → 28.8 V dc - - 125mm 40mm 120mm
RS Stock No. 453-2618
Mfr. Part No.6ES7321-1BL00-0AA0
BrandSiemens
HK$4,023.01
Each
units
SIMATIC S7-300 Series 32 - Digital - S7-300 Series 32 - 20.4 → 28.8 V dc - - 125mm 40mm 120mm
RS Stock No. 901-0826
Mfr. Part No.2903805
HK$5,433.25
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. 512-5895
Mfr. Part No.CJ1W-OC211
BrandOmron
HK$4,387.65
Each
units
SYSMAC CJ Series - 16 - Digital, Relay SYSMAC CJ Series 16 - 24 V dc, 250 V ac 2 A - 89mm 31mm 95.4mm
RS Stock No. 901-0817
Mfr. Part No.2903806
HK$5,030.28
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. 882-0322
Mfr. Part No.758-915
BrandWago
HK$4,409.27
Each
units
750 1 1 - - 750 Series 2 - 24 V dc - - 91mm 66mm -
RS Stock No. 320-9137
Mfr. Part No.FX2N-32ER-ES/UL
BrandMitsubishi
HK$3,557.84
Each
units
FX2N Series 16 16 - - FX2N Series - - 100 → 240 V ac - I/O Module 90mm 150mm 87mm
RS Stock No. 801-5766
Mfr. Part No.2700973
HK$3,169.86
Each
units
ILC 131 ETH - - - - - - - - - - - - -
RS Stock No. 746-6722
Mfr. Part No.6ES7361-3CA01-0AA0
BrandSiemens
HK$2,688.40
Each
units
6ES7 Series - - - - S7-300 Series - - 24 V dc - - 125mm 80mm 120mm
RS Stock No. 815-5509
Mfr. Part No.AFPX-PLS
BrandPanasonic
HK$1,606.57
Each
units
AFPX Series 2 1 - Pulse FP-X Series - - - - - - - -
RS Stock No. 147-988
Mfr. Part No.BMXAMI0410
HK$4,106.94
Each
units
M340 4 - Analogue - M340 Series 4 - 24 V dc - - - - -
RS Stock No. 746-6621
Mfr. Part No.6ES7331-7KB02-0AB0
BrandSiemens
HK$2,413.84
Each
units
- 2 - Analogue - SIMATIC S7-300 Series - - - - Input 125mm 40mm 120mm
RS Stock No. 612-9078
Mfr. Part No.6ES7331-7HF01-0AB0
BrandSiemens
HK$8,396.96
Each
units
SIMATIC S7-300 Series 8 - Analogue - SIMATIC S7-300 Series 8 - 24 V dc - - 125mm 40mm 120mm
RS Stock No. 148-004
Mfr. Part No.BMXAMO0210
HK$3,114.96
Each
units
M340 - 2 - Analogue M340 Series 2 - 24 V dc - - - - -
RS Stock No. 453-2630
Mfr. Part No.6ES7322-1HH01-0AA0
BrandSiemens
HK$4,086.15
Each
units
SIMATIC S7-300 Series - 16 - Digital, Relay S7-300 Series - - 24 V dc, 24 → 240 V ac 2 A - 125mm 40mm 120mm
RS Stock No. 806-6887
Mfr. Part No.TMC2AI2
HK$985.15
Each
units
Modicon M221 2 - Analogue Current Modicon M221 - - 24 V dc 20 mA - - - -
RS Stock No. 453-2539
Mfr. Part No.6ES7322-1BH01-0AA0
BrandSiemens
HK$2,768.48
Each
units
SIMATIC S7-300 Series - 16 - Digital SIMATIC S7-300 Series 16 - 20.4 → 28.8 V dc 4 A - 125mm 40mm 120mm
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