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. PLCs are ideal for applications that require constant monitoring of input devices whilst allowing decisions to be made via a custom program. This ultimately enables it to control an output.

Types of PLCs

Programmable logic controllers are divided into small, medium and large modular 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.

What setups are suitable for programmable logic controllers?

PLCs feature a modular design, making them suitable for use in a wide range of applications. Due to the modular aspect, PLCs can be plugged into numerous setups making them highly versatile.


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Description Price For Use With Manufacturer Series Number of Inputs Number of Digital Inputs Output Type Input Type Number of Analogue Inputs Voltage Category Number of Digital Outputs Supply Voltage Number of Analogue Outputs Interface Kit Included Number of Outputs
RS Stock No. 917-6370
BrandRS PRO
kr 1 056,72
Each
Units
- - 8 - Digital, Relay Analogue, Digital - - - 12 → 24 V dc - - - 4
RS Stock No. 917-6373
BrandRS PRO
kr 957,20
Each
Units
- - 8 - Digital, Relay Digital - - - 110 → 240 V ac - - - 4
RS Stock No. 917-6377
BrandRS PRO
kr 970,42
Each
Units
- - 8 - Digital, Relay Analogue, Digital - - - 12 → 24 V dc - - - 4
RS Stock No. 917-6389
BrandRS PRO
kr 469,89
Each
Units
RS PRO Logic Modules - 8 - Digital, Relay Digital - - - 12 → 24 V dc - - - 4
RS Stock No. 917-6361
BrandRS PRO
kr 896,33
Each
Units
- - 8 - Digital, Relay Digital - - - 110 → 240 V ac - - - 4
RS Stock No. 917-6392
BrandRS PRO
kr 386,80
Each
Units
RS PRO Logic Modules - 1 - RS485 Protocol (D-), RS485 Protocol (D+), RS485 Protocol (Two Wires) TTL Level - - - 12 → 24 V dc - - - 1
RS Stock No. 917-6383
BrandRS PRO
kr 441,55
Each
Units
RS PRO Logic Modules - 1 - RS485 Protocol (D-), RS485 Protocol (D+), RS485 Protocol (Two Wires) TTL Level - - - 110 → 240 V ac - - - 1
RS Stock No. 917-6386
BrandRS PRO
kr 529,63
Each
Units
RS PRO Logic Modules - 8 - Digital, Relay Digital - - - 110 → 240 V ac - - - 4
RS Stock No. 917-6399
BrandRS PRO
kr 149,75
Each
Units
RS PRO Logic Modules - - - - - - - - - - - - -
RS Stock No. 123-2105
Mfr. Part No.0850-0580
BrandBARTH
kr 938,78
Each
Units
STG-580 lococube mini-PLC 5 - Digital, PWM, Solid-State Analogue, DC Digital - - - 7 → 32 V dc - - - 6
RS Stock No. 862-4471
Mfr. Part No.6ES7214-1AG40-0XB0
BrandSiemens
kr 3 991,98
Each
Units
SIMATIC S7-1200 Series S7-1200 14 (Digital Input, 2 switch as Analogue Input) - Digital, Transistor Analogue, Digital - 24 V dc - - - - - 10 (Digital Output, Transistor Output)
RS Stock No. 864-4538
Mfr. Part No.0850-0600
BrandBARTH
kr 1 269,48
Each
Units
STG-600 lococube mini-PLC 10 - PWM, Solid State Analogue, Digital - - - 7 → 32 V dc - - - 9
RS Stock No. 864-4541
Mfr. Part No.0660-0600
BrandBARTH
kr 1 280,15
Each
Units
STG-600 lococube mini-PLC 10 - Mosfet, Solid State Analogue, Digital - - - 7 → 32 V dc - - - 8
RS Stock No. 872-6321
Mfr. Part No.6AV2132-3GB00-0AA1
BrandSiemens
kr 7 599,11
Each
Units
LOGO! 8, LOGO! 8.2 LOGO! - - Relay Digital - - - 12 → 24 V dc - - - 4
RS Stock No. 479-6137
kr 2 242,08
Each
Units
- Zelio Logic 12 - Transistor Analogue, Discrete - - - 24 V dc - - - 8
RS Stock No. 468-4242
Mfr. Part No.SR3B261BD
kr 2 669,76
Each
Units
- Zelio Logic 16 - Relay Analogue, Discrete - - - 24 V dc - - - 10
RS Stock No. 442-0802
Mfr. Part No.AL2-24MR-D
BrandMitsubishi
kr 2 436,48
Each
Units
- Alpha 2 15 - Relay Digital - - - 24 V dc - - - 9
RS Stock No. 825-1681
Mfr. Part No.6ED1055-1MB00-0BA2
BrandSiemens
kr 728,38
Each
Units
LOGO! 8, LOGO! 8.2 LOGO! 4 - Relay Digital - - - 12 → 24 V dc - - - 4
RS Stock No. 862-4474
Mfr. Part No.6ES7212-1HE40-0XB0
BrandSiemens
kr 2 639,58
Each
Units
SIMATIC S7-1200 Series S7-1200 8 (Digital Input, 2 switch as Analogue Input) - Digital, Relay Analogue, Digital - 24 V dc - - - - - 6 (Digital Output, Relay Output)
RS Stock No. 885-0897
Mfr. Part No.0850-0650
BrandBARTH
kr 1 254,99
Each
Units
STG-650 lococube mini-PLC 10 - Digital Analogue, Digital - - - 7 → 32 V dc - - - 9