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庫存編號 468-4242
製造零件編號SR3B261BD
HK$2,413.18
單位
- - - 16 Analogue, Discrete - - - Relay - - 10 - Yes
RS庫存編號 885-0926
製造零件編號IS.MD21.base
HK$2,311.20
單位
- M-Duino - 13 Analogue, Digital - - 12 → 24 V dc Analogue, Digital - - 8 Ethernet, ModBus -
RS庫存編號 818-4165
製造零件編號CJ1WID231CHN
BrandOmron
HK$3,290.05
單位
CJ1 Series CJ1 - 32 DC - - 24 V dc - - - - - -
RS庫存編號 705-4940
製造零件編號FX3G-24MT-DSS
BrandMitsubishi
HK$4,678.96
單位
- - - 14 Sink/Source - - - Transistor - - 10 - -
RS庫存編號 539-0718
製造零件編號FX3U-64MR/ES
BrandMitsubishi
HK$11,262.68
單位
- - - 32 Sink/Source - - - Relay - - 32 - -
RS庫存編號 864-4532
製造零件編號0660-0500
BrandBARTH
HK$859.98
單位
STG-560 - - 5 Analogue, Digital - - - Mosfet, Solid State - - 5 - -
RS庫存編號 864-4538
製造零件編號0850-0600
BrandBARTH
HK$1,104.89
單位
STG-600 - - 10 Analogue, Digital - - - PWM, Solid State - - 9 - -
RS庫存編號 815-5760
製造零件編號FPG-C32T2H
BrandPanasonic
HK$4,075.40
單位
Minas A4 Servo Drives FPG - 16 - - - 24 V dc NPN, Transistor - - 16 Ethernet, ModBus -
RS庫存編號 818-4193
製造零件編號CJ1WOD231CHN
BrandOmron
HK$3,657.37
單位
CJ1 Series CJ1 - - - - - 12 → 24 V dc NPN - - 32 - -
RS庫存編號 815-5631
製造零件編號AFPX-C14R
BrandPanasonic
HK$1,542.48
單位
FP-X Series AFPX-C Series - 8 DC - - 100 → 240 V ac Relay - - 8 Ethernet -
RS庫存編號 825-1681
製造零件編號6ED1055-1MB00-0BA2
BrandSiemens
HK$1,201.93
單位
LOGO! 8, LOGO! 8.2 - - 4 Digital - - - Relay - - 4 - -
RS庫存編號 862-4471
製造零件編號6ES7214-1AG40-0XB0
BrandSiemens
HK$4,215.96
單位
SIMATIC S7-1200 Series S7-1200 - 2 switch as Analogue Input), 14 (Digital Input Analogue, Digital - - 24 V dc Digital, Transistor - - Transistor Output), 10 (Digital Output Ethernet -
RS庫存編號 746-2884
製造零件編號CJ2M-CPU33
BrandOmron
HK$11,509.90
單位
CJ2M Series CJ2M - - - - - 5 V dc Pulse - - - Ethernet Yes
RS庫存編號 917-6361
BrandRS PRO
HK$904.67
單位
- - - 8 Digital - - - Digital, Relay - - 4 ModBus Yes
RS庫存編號 681-8715
製造零件編號BMXP342000
HK$5,918.71
單位
Modicon M340 Modicon M340 - - Analogue, Digital - - 24 V dc Analogue, Digital - - - Ethernet -
RS庫存編號 885-0945
製造零件編號IS.MD38.base
HK$4,148.21
單位
- M-Duino - 8 Analogue, Digital - - 12 → 24 V dc Analogue, Digital, Relay - - 22 Ethernet, ModBus -
RS庫存編號 468-4494
製造零件編號SR2B201FU
HK$2,197.73
單位
- - - 12 Discrete - - - Relay - - 8 - Yes
RS庫存編號 862-4477
製造零件編號6ES7214-1BG40-0XB0
BrandSiemens
HK$3,330.89
單位
SIMATIC S7-1200 Series S7-1200 - 2 switch as Analogue Input), 14 (Digital Input Analogue, Digital - - 85 → 264 V ac Digital, Relay - - Relay Output), 10 (Digital Output Ethernet -
RS庫存編號 885-0904
製造零件編號0850-0100
BrandBARTH
HK$2,007.29
單位
STG-100 - - 8 Analogue, Digital - - - Analogue - - 12 - Yes
RS庫存編號 864-4535
製造零件編號0850-0500
BrandBARTH
HK$888.72
單位
STG-115 - - 5 Analogue, Digital - - - PWM, Solid State - - 5 - -