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 Interface Kit Included Number of Outputs Network Type
RS Stock No. 917-6370
BrandRS PRO
PHP6,886.86
Each
units
- - 8 - Digital, Relay Analogue, Digital - - - 12 → 24 V dc - - 4 ModBus
RS Stock No. 917-6361
BrandRS PRO
PHP6,507.63
Each
units
- - 8 - Digital, Relay Digital - - - 110 → 240 V ac - - 4 ModBus
RS Stock No. 917-6377
BrandRS PRO
PHP5,682.40
Each
units
- - 8 - Digital, Relay Analogue, Digital - - - 12 → 24 V dc - - 4 ModBus
RS Stock No. 917-6383
BrandRS PRO
PHP2,585.78
Each
units
RS PRO Logic Modules - 1 - RS485 Protocol (D-), RS485 Protocol (D+), RS485 Protocol (Two Wires) TTL Level - - - 110 → 240 V ac - - 1 ModBus
RS Stock No. 917-6399
BrandRS PRO
PHP929.56
Each
units
RS PRO Logic Modules - - - - - - - - - - - - -
RS Stock No. 917-6389
BrandRS PRO
PHP3,441.16
Each
units
RS PRO Logic Modules - 8 - Digital, Relay Digital - - - 12 → 24 V dc - - 4 ModBus
RS Stock No. 917-6373
BrandRS PRO
PHP6,671.40
Each
units
- - 8 - Digital, Relay Digital - - - 110 → 240 V ac - - 4 ModBus
RS Stock No. 917-6386
BrandRS PRO
PHP3,384.02
Each
units
RS PRO Logic Modules - 8 - Digital, Relay Digital - - - 110 → 240 V ac - - 4 ModBus
RS Stock No. 917-6392
BrandRS PRO
PHP2,708.04
Each
units
RS PRO Logic Modules - 1 - RS485 Protocol (D-), RS485 Protocol (D+), RS485 Protocol (Two Wires) TTL Level - - - 12 → 24 V dc - - 1 ModBus
RS Stock No. 875-5682
Mfr. Part No.FX5U-64MT-ESS
BrandMitsubishi
PHP73,299.59
Each
units
MELSEC IQ-F Series IQ Platform-Compatible PLC FX5U 32 - Relay, Transistor Sink, Source - 100 → 240 V ac - - - - 32 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. 401-428
Mfr. Part No.CP1L-M40DR-A
BrandOmron
PHP45,254.69
Each
units
SYSMAC CP1L Series CP1L 24 (DC) - Relay DC - 85 → 264 V ac - - - - 16 (Relay) USB
RS Stock No. 746-6527
Mfr. Part No.6ES7314-6EH04-0AB0
BrandSiemens
PHP161,174.80
Each
units
- S7-300 28 (24 Digital, 4 Analogue) - Analogue, Digital Analogue, Digital - 24 V dc - - - - 18 (16 Digital, 2 Analogue) Ethernet, Profinet
RS Stock No. 825-1679
Mfr. Part No.6ED1055-1FB10-0BA2
BrandSiemens
PHP6,588.16
Each
units
LOGO! 8, LOGO! 8.2 LOGO! 8 - Relay Digital - - - 115 V ac/dc, 230 V ac/dc - - 8 -
RS Stock No. 705-5795
Mfr. Part No.CP1E-E20DR-A
BrandOmron
PHP26,601.75
Each
units
CP1E Series CP1E 12 - Relay Pulse - 85 → 264 V ac - - - - 8 (Relay) USB
RS Stock No. 825-1681
Mfr. Part No.6ED1055-1MB00-0BA2
BrandSiemens
PHP7,343.37
Each
units
LOGO! 8, LOGO! 8.2 LOGO! 4 - Relay Digital - - - 12 → 24 V dc - - 4 -
RS Stock No. 862-4480
Mfr. Part No.6ES7214-1HG40-0XB0
BrandSiemens
PHP38,545.29
Each
units
SIMATIC S7-1200 Series S7-1200 14 (Digital Input, 2 switch as Analogue Input) - Digital, Relay Analogue, Digital - 24 V dc - - - - 10 (Digital Output, Relay Output) Ethernet
RS Stock No. 806-6777
Mfr. Part No.TM241CE40T
PHP39,696.36
Each
units
- Modicon M241 24 - Transistor - - 24 V - - - - 16 Ethernet, ModBus, Profibus DP, USB
RS Stock No. 862-4477
Mfr. Part No.6ES7214-1BG40-0XB0
BrandSiemens
PHP39,770.00
Each
units
SIMATIC S7-1200 Series S7-1200 14 (Digital Input, 2 switch as Analogue Input) - Digital, Relay Analogue, Digital - 85 → 264 V ac - - - - 10 (Digital Output, Relay Output) Ethernet
RS Stock No. 825-1675
Mfr. Part No.6ED1055-1FB00-0BA2
BrandSiemens
PHP7,288.16
Each
units
LOGO! 8, LOGO! 8.2 LOGO! 4 - Relay Digital - - - 115 V ac/dc, 230 V ac/dc - - 4 -
RS Stock No. 821-1778
Mfr. Part No.CP1L-EM40DT1-D
BrandOmron
PHP47,829.26
Each
units
CP Series CP1L-EM 24 - PNP DC - 20.4 → 26.4 V dc - - - - 16 Ethernet