PLCs - Programmable Logic Controllers

A PLC (programmable logic controller) is an industrial digital computer designed for the control of manufacturing processes or robotic devices where reliability control, simple programming and fault diagnosis is necessary. They were originally built to replace electromechanical relay systems in industrial automation.

A CPU (central processing unit) forms part of the PLC system. PLC CPUs are microprocessor-based and act as the electronic circuitry within an industrial computer. They carry out instructions from the computer program, performing basic mathematical, logical, control, input and output operations.

What are PLCs used for?

PLC controllers are important for the correct functioning of machinery in manufacturing and industry. They are used in the automation of electromechanical processes, including control of machinery on assembly lines, amusement rides, or lighting fixtures.

Types of PLCs

Programmable logic controllers are divided into small, medium and large categories. Small control systems are robust, compact and mountable on top of or beside the equipment to be controlled. Medium controllers mainly use rack mounting or backplane systems, allowing for simple upgrading via additional function cards. Large systems are necessary for applications where complex control functions are executed, usually in large plants, in machinery requiring constant monitoring, or control of other PLC hardware.


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Description Price For Use With Manufacturer Series Number of Digital Inputs Number of Inputs Input Type Number of Analogue Inputs Number of Digital Outputs Voltage Category Output Type Interface Kit Included Number of Outputs Network Type Display Included
RS Stock No. 781-6859
Mfr. Part No.Q00UJCPU
BrandMitsubishi
MYR2,378.46
Each
units
MELSEC Q Series Q Series - - - - - - - - - - Ethernet -
RS Stock No. 705-4865
Mfr. Part No.FX3G-40MR-ES
BrandMitsubishi
MYR3,347.99
Each
units
- - - 24 Sink/Source - - - Relay - - 16 - -
RS Stock No. 123-5964
Mfr. Part No.FX3S-30MT-DSS
BrandMitsubishi
MYR2,011.10
Each
units
FX3 Series FX3S - 16 (Sink/Source) Sink, Source - - 24 V dc Transistor (Source) - - 14 (Transistor) Ethernet, ModBus -
RS Stock No. 795-7972
Mfr. Part No.FX3S-30MR-ES
BrandMitsubishi
MYR2,097.81
Each
units
FX3 Series FX3S - 16 DC - - 100 → 240 V ac Relay, Transistor - - 14 Ethernet, ModBus -
RS Stock No. 875-5672
Mfr. Part No.FX5U-32MR-ES
BrandMitsubishi
MYR3,722.19
Each
units
MELSEC IQ-F Series IQ Platform-Compatible PLC FX5U - 16 Sink, Source - - 100 → 240 V ac Relay, Transistor - - 16 Inverter Communication, MELSEC Communication protocol (3C/4C Frames), MELSOFT Connection, Modbus RTUI, N:N Network, Predefined Protocol Support, SLMP (3E Frame), Socket Communication -
RS Stock No. 705-4874
Mfr. Part No.FX3G-60MR-ES
BrandMitsubishi
MYR4,859.31
Each
units
- - - 36 Sink/Source - - - Relay - - 24 - -
RS Stock No. 539-0689
Mfr. Part No.FX3U-32MR/ES
BrandMitsubishi
MYR4,609.18
Each
units
- - - 16 Sink/Source - - - Relay - - 16 - -
RS Stock No. 617-0177
Mfr. Part No.FX3U-16MR/DS
BrandMitsubishi
MYR3,495.10
Each
units
- - - 8 Sink/Source - - - Relay - - 8 - -
RS Stock No. 617-0313
Mfr. Part No.FX3U-128MR/ES
BrandMitsubishi
MYR10,145.40
Each
units
- - - 64 Sink/Source - - - Relay - - 64 - -
RS Stock No. 539-0724
Mfr. Part No.FX3U-80MR/ES
BrandMitsubishi
MYR7,220.60
Each
units
- - - 40 Sink/Source - - - Relay - - 40 - -
RS Stock No. 539-0702
Mfr. Part No.FX3U-48MR/ES
BrandMitsubishi
MYR4,626.52
Each
units
- - - 24 Sink/Source - - - Relay - - 24 - -
RS Stock No. 781-6865
Mfr. Part No.Q02UCPU
BrandMitsubishi
MYR4,694.89
Each
units
MELSEC Q Series Q Series - 2048 - - - - - - - 8192 Ethernet -
RS Stock No. 875-5691
Mfr. Part No.FX5U-80MT-ESS
BrandMitsubishi
MYR6,860.40
Each
units
MELSEC IQ-F Series IQ Platform-Compatible PLC FX5U - 40 Sink, Source - - 100 → 240 V ac Relay, Transistor - - 40 Inverter Communication, MELSEC Communication protocol (3C/4C Frames), MELSOFT Connection, Modbus RTUI, N:N Network, Predefined Protocol Support, SLMP (3E Frame), Socket Communication -
RS Stock No. 617-0199
Mfr. Part No.FX3U-32MT/ESS
BrandMitsubishi
MYR4,744.82
Each
units
- - - 16 Sink/Source - - - Transistor - - 16 - -
RS Stock No. 795-7978
Mfr. Part No.FX3S-20MR-ES
BrandMitsubishi
MYR1,680.92
Each
units
FX3 Series FX3S - 12 DC - - 100 → 240 V ac Relay, Transistor - - 8 Ethernet, ModBus -
RS Stock No. 705-4934
Mfr. Part No.FX3G-40MR-DS
BrandMitsubishi
MYR3,938.81
Each
units
- - - 24 Sink/Source - - - Relay - - 16 - -
RS Stock No. 123-5962
Mfr. Part No.FX3S-14MT-DSS
BrandMitsubishi
MYR1,170.64
Each
units
FX3 Series FX3S - 8 (Sink/Source) Sink, Source - - 24 V dc Transistor (Source) - - 6 (Transistor) Ethernet, ModBus -
RS Stock No. 875-5688
Mfr. Part No.FX5U-32MT-ESS
BrandMitsubishi
MYR4,379.05
Each
units
MELSEC IQ-F Series IQ Platform-Compatible PLC FX5U - 16 Sink, Source - - 100 → 240 V ac Relay, Transistor - - 16 Inverter Communication, MELSEC Communication protocol (3C/4C Frames), MELSOFT Connection, Modbus RTUI, N:N Network, Predefined Protocol Support, SLMP (3E Frame), Socket Communication -
RS Stock No. 123-5959
Mfr. Part No.FX3S-10MR-DS
BrandMitsubishi
MYR773.75
Each
units
FX3 Series FX3S - 6 (Sink/Source) Sink, Source - - 24 V dc Relay - - 4 (Relay) Ethernet, ModBus -
RS Stock No. 795-7975
Mfr. Part No.FX3S-14MR-ES
BrandMitsubishi
MYR1,260.69
Each
units
FX3 Series FX3S - 8 DC - - 100 → 240 V ac Relay, Transistor - - 6 Ethernet, ModBus -