PLC Accessories

PLC accessories are devices and gadgets required for the optimum performance of a programmable logic controller. These accessories include interface splitter boxes, communication cassettes and front connectors. The type of PLC you're using will determine the accessories needed.

Types of PLC accessories

A programmable logic controller receives and transmits electronic signals in any kind of electrical system. Because of this flexibility in interfacing, there are a wide range of accessories that suit different controllers. As PLC's come in various sizes, the accessories needed depend on various factors such as the input/output requirements, cable length and range.

  • Cables and connectors - available in a wide range including HMI, USB and ethernet connectors and cables.
  • Expansion modules - are the ideal solution for the acquisition and management of applications. They read and condition data from strain gauge load and communicate basic weight data back to the processor.
  • I/O modules - are one of the three core components that operate a PLC. I/O refers to input/output. PLC I/O modules act as messengers between a processor and an I/O device.
  • Power supplies - Some power supplies are embedded with switches for selecting a particular programming mode or protecting the memory. A low DC voltage output powers the various modules as well as the integral battery.
  • Programming software - is the collective term referring to the data and instructions provided to a PLC via various types of programming languages. These instructions are executed by the plug-in time switches (CPU) to operate, monitor and control machinery and equipment.
  • Racks and enclosures - are the perfect solution to mounting the modular components that hold everything together within a programmable logic controller. They're available in different sizes and mounting types including DIN rail.
  • Training manuals - offer a clear, visual explanation of the system and processes.

How to choose the right PLC accessories

Accessories for PLCs can be chosen depending on the application you need them for. For example, water treatment devices will require different PLC accessories to metallurgy systems. The range of accessories includes batteries, cables, connectors and adapters. A battery backup is used by some to protect valuable memory and data in the event of a power outage.


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Description Price Accessory Type For Use With Range Dimensions Series Input Type Termination Application Mounting Type Output Type Cable Length Number of I/O Hazardous Area Certification Number of Outputs
RS Stock No. 662-3498
Mfr. Part No.6ES7131-4BD01-0AB0
BrandSiemens
TWD1,702.00
Each
units
PLC I/O Module SIMATIC ET 200S Series SIMATIC 81 x 15 x 52 mm 6ES7 Digital - - - - - - - -
RS Stock No. 806-7042
Mfr. Part No.TM3AM6
TWD15,220.00
Each
units
PLC I/O Module Modicon M221, Modicon M241, Modicon M251 - 90 x 23.6 x 70 mm AFPX Current, Voltage - - - Current, Voltage - - - -
RS Stock No. 455-6670
Mfr. Part No.QC30R2
BrandMitsubishi
TWD2,433.00
Each
units
Cable QC Series - - - - - - - - - - - -
RS Stock No. 810-4141
Mfr. Part No.6ES7231-5PF32-0XB0
BrandSiemens
TWD18,828.00
Each
units
PLC I/O Module CPU 1211, CPU 1212, CPU 1214 SIMATIC 100 x 70 x 75 mm CJ1W-ID Analogue - - - - - - - -
RS Stock No. 122-1521
Mfr. Part No.0007-0027
BrandBARTH
TWD369.00
Each
units
Bracket Mini-PLC STG-500 / 550 - - HA-27 - Screw Mini-PLC - - - - - -
RS Stock No. 746-6602
Mfr. Part No.6ES7323-1BH01-0AA0
BrandSiemens
TWD11,983.00
Each
units
Digital I/O Module S7-300 Series SIMATIC 125 x 40 x 120 mm SM 1222 Digital - - - Digital - - - -
RS Stock No. 787-7964
Mfr. Part No.6ES7223-1BH32-0XB0
BrandSiemens
TWD7,478.00
Each
units
PLC I/O Module SIMATIC S7-1200 Series SIMATIC 100 x 45 x 75 mm TM3 Digital - - - Digital - - - -
RS Stock No. 746-6741
Mfr. Part No.6ES7390-0AA00-0AA0
BrandSiemens
TWD327.00
Each
units
Bus Connector SIMATIC S7-300 SM 331 Analog Input Module - - - - - - - - - - - -
RS Stock No. 857-6344
Mfr. Part No.2302670
TWD5,599.00
Each
units
Cable & Connector Mitsubishi Melsec Q - - - - - - - - 3m - - -
RS Stock No. 608-5934
Mfr. Part No.ABE7H16R10
TWD4,610.00
Each
units
Base Quantum Automation Platform - - - - - - - - - - - -
RS Stock No. 662-3505
Mfr. Part No.6ES7193-4CA30-0AA0
BrandSiemens
TWD362.00
Each
units
Terminal ET 200S Electronic Modules - 132 x 15 x 43 mm - - - - - - - - - -
RS Stock No. 806-6922
Mfr. Part No.TM3DI8
TWD6,109.00
Each
units
PLC I/O Module Modicon M221, Modicon M241, Modicon M251 - 90 x 23.6 x 70 mm TM3 - - - - - - - - -
RS Stock No. 539-0869
Mfr. Part No.FX3U-232-BD
BrandMitsubishi
TWD5,442.00
Each
units
Base FX3 Series - - - - - - - - - - - -
RS Stock No. 746-6687
Mfr. Part No.6ES7341-1CH02-0AE0
BrandSiemens
TWD43,382.00
Each
units
PLC Expansion Module S7-300 Series - 40 x 125 x 120 mm - - - - - - - - - -
RS Stock No. 455-6901
Mfr. Part No.QJ61BT11N
BrandMitsubishi
TWD8,559.00
Each
units
Control Network Module CC Link Controller Network - - - - - - - - - - - -
RS Stock No. 806-6979
Mfr. Part No.TM3DQ16TK
TWD6,993.00
Each
units
PLC I/O Module Modicon M221, Modicon M241, Modicon M251 - 90 x 17.6 x 70 mm TM3 - - - - Source, Transistor - - - -
RS Stock No. 320-9143
Mfr. Part No.FX2N-48ER-ES/UL
BrandMitsubishi
TWD20,047.00
Each
units
PLC I/O Module FX2N Series - 90 x 150 x 87 mm FX2N Series - - - - - - - - -
RS Stock No. 806-6950
Mfr. Part No.TM3DQ16RG
TWD8,051.00
Each
units
PLC I/O Module Modicon M221, Modicon M241, Modicon M251 - 90 x 23.6 x 70 mm TM3 - - - - Relay - - - -
RS Stock No. 508-3937
Mfr. Part No.750554
BrandWago
TWD15,819.00
Each
units
PLC I/O Module 750 Series - 100 x 12 x 64 mm SYSMAC CJ, SYSMAC CP1H, SYSMAC CP1L - - - - Analogue - - - -
RS Stock No. 815-5849
Mfr. Part No.FP0-TC4
BrandPanasonic
TWD16,244.00
Each
units
Thermocouple Unit FP0 Series - - - - - - - - - - - -