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. 148-206
Mfr. Part No.BMXDDI3202K
R 4,292.53
Each
units
M340 32 - Discrete - M340 Series 32 - 24 V dc - - - - -
RS stock no. 806-6881
Mfr. Part No.TMC2TI2
R 1,139.17
Each
units
Modicon M221 2 - Analogue Current Modicon M221 - - 24 V dc 20 mA - - - -
RS stock no. 548-066
Mfr. Part No.BMXAMM0600
R 5,828.74
Each
units
Modicon M340 Series 4 2 Analogue Analogue Modicon M340 6 - 24 V dc 0 → 20 mA Mixed Analogue I/O Module 307.6mm 100mm 140mm
RS stock no. 608-5956
Mfr. Part No.ABE7H16R31
R 1,064.74
Each
units
- - - - - - - - 19 → 30 V dc 0.5 (Per Channel) A, 1.8 (Per Common) A Passive Discrete I/O Sub-Base - 125mm -
RS stock no. 148-004
Mfr. Part No.BMXAMO0210
R 4,900.19
Each
units
M340 - 2 - Analogue M340 Series 2 - 24 V dc - - - - -
RS stock no. 827-3833
Mfr. Part No.170AAI03000
R 15,877.38
Each
units
- 8 - Analogue - Modicon Momentum - - 1 → 5 V - Input 125mm 141.5mm 47.5mm
RS stock no. 770-2508
Mfr. Part No.TM5SDI12DK
R 2,300.13
Each
units
M258 12 - Digital - M258 PLC Series - - - - - - - -
RS stock no. 148-082
Mfr. Part No.BMXDDO3202K
R 5,012.25
Each
units
M340 - 32 - Discrete, Transistor M340 Series 32 - 24 V dc - - - - -
RS stock no. 253-2335
Mfr. Part No.TSXDMZ28DR
R 8,728.90
Each
units
Modicon TSX Micro 16 12 Discrete Discrete Modicon TSX 28 - 100 → 120 V ac - - - - -
RS stock no. 147-988
Mfr. Part No.BMXAMI0410
R 5,374.69
Each
units
M340 4 - Analogue - M340 Series 4 - 24 V dc - - - - -
RS stock no. 281-2013
Mfr. Part No.TSXAEZ414
R 13,456.00
Each
units
Modicon TSX Micro 4 (Channel) - Analogue - Modicon TSX 4 - - - - - - -
RS stock no. 147-641
Mfr. Part No.BMXDDO1602
R 2,663.33
Each
units
M340 - 16 - Discrete, Transistor M340 Series 16 - 24 V dc - - - - -
RS stock no. 148-054
Mfr. Part No.BMXDDI6402K
R 6,662.79
Each
units
M340 64 - Discrete - M340 Series 64 - 24 V dc - - - - -
RS stock no. 806-6887
Mfr. Part No.TMC2AI2
R 997.24
Each
units
Modicon M221 2 - Analogue Current Modicon M221 - - 24 V dc 20 mA - - - -
RS stock no. 615-2387
Mfr. Part No.SR2COM01
R 2,401.24
Each
units
Zelio Logic - - - - - - - 12 → 24 V dc - Relay 107.6mm 72mm 59.5mm
RS stock no. 674-1928
Mfr. Part No.TM2AMM3HT
R 3,723.45
Each
units
Modicon M238, Twido Series 2 1 Analogue Analogue Modicon M238, Twido Series - - 24 V dc - I/O Module 23.5mm 70mm 90mm
RS stock no. 148-060
Mfr. Part No.BMXEHC0200
R 6,452.07
Each
units
BMX 6 2 Encoder Configurable Modicon M340 6/2 - 24 V dc 2 A - 503.2mm 100mm 150mm
RS stock no. 148-183
Mfr. Part No.BMXDDI1602
R 2,245.93
Each
units
M340 16 - Discrete - M340 Series 16 - 24 V dc - - - - -
RS stock no. 806-6957
Mfr. Part No.TM3DQ16R
R 2,492.85
Each
units
TM3 Series - 16 - Relay Modicon M221, Modicon M241, Modicon M251 - - 24 → 240 V 2 A - 90mm 23.6mm 70mm
RS stock no. 253-2341
Mfr. Part No.TSXDMZ64DTK
R 12,695.76
Each
units
Modicon TSX Micro 32 32 (Solid State) Discrete Discrete Modicon TSX 64 - 24 V dc 100 mA - - - -