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 Input Type Mounting Type Output Type Number of I/O Number of Outputs Output Current Maximum Operating Temperature Supply Voltage Application Cable Length
RS Stock No. 787-7986
Mfr. Part No.6ES7234-4HE32-0XB0
BrandSiemens
TWD11,544.00
Each
units
PLC I/O Module SIMATIC S7-1200 Series SIMATIC 100 x 45 x 75 mm Analogue - Analogue 6 2 0 → 20 mA +70°C - - -
RS Stock No. 122-1520
Mfr. Part No.0007-0018
BrandBARTH
TWD357.00
Each
units
Bracket Mini-PLC STG-600 / 650 - - - - - - - - - - Mini-PLC -
RS Stock No. 453-2589
Mfr. Part No.6ES7392-1AM00-0AA0
BrandSiemens
TWD1,818.00
Each
units
Connector SIMATIC S7-300 Series - - - - - - - - - - - -
RS Stock No. 806-7010
Mfr. Part No.TM3AI2H
TWD9,660.00
Each
units
PLC I/O Module Modicon M221, Modicon M241, Modicon M251 - 90 x 23.6 x 70 mm Current, Voltage - - - - - - - - -
RS Stock No. 539-0881
Mfr. Part No.FX3U-485-BD
BrandMitsubishi
TWD5,442.00
Each
units
Base FX3 Series - - - - - - - - - - - -
RS Stock No. 889-1615
Mfr. Part No.SNAP-PAC-R1
BrandOpto 22
TWD41,479.00
Each
units
PLC I/O Module SNAP PAC System - 84.15 x 44.44 x 106.37 mm - Rack Mount - - - - +60°C 5 → 5.2 V dc Communication -
RS Stock No. 453-2573
Mfr. Part No.6ES7392-1AJ00-0AA0
BrandSiemens
TWD1,153.00
Each
units
Connector CP 343-2, CP 343-2P, SIMATIC S7 Series - - - - - - - - - - - -
RS Stock No. 539-0897
Mfr. Part No.FX3U-USB-BD
BrandMitsubishi
TWD5,442.00
Each
units
PLC Expansion Module FX3U Series - 46.1 x 19.6 x 53.5 mm - - - - - - - - - -
RS Stock No. 868-7359
Mfr. Part No.750-461/003-000
BrandWago
TWD9,003.00
Each
units
PLC I/O Module - - 64 x 12 x 100 mm Analogue DIN Rail Voltage 3 1 - +850°C - Marine -
RS Stock No. 875-5745
Mfr. Part No.FX5-CNV-BUS
BrandMitsubishi
TWD1,486.00
Each
units
- FX5U CPU Module, FX5UC CPU Module - 16 x 90 x 83 mm Current, Voltage Panel Mount - - - - - - - -
RS Stock No. 611-9548
Mfr. Part No.FX2N-8EX-ES/UL
BrandMitsubishi
TWD4,546.00
Each
units
PLC Expansion Module FX3U Series - 90 x 350 x 87 mm - - Digital, Relay, Transistor - 8 → 64 - - - - -
RS Stock No. 781-6912
Mfr. Part No.FX2N-8AD
BrandMitsubishi
TWD22,243.00
Each
units
PLC Expansion Module FX2N Series - 105 x 75 x 75 mm Analogue - Digital - 8 - - - - -
RS Stock No. 539-0730
Mfr. Part No.FX3U-4AD-ADP
BrandMitsubishi
TWD10,862.00
Each
units
PLC I/O Module FX3U Series - 106 x 17.6 x 89.5 mm Analogue - - - - - - - - -
RS Stock No. 662-3561
Mfr. Part No.6ES7138-4CA01-0AA0
BrandSiemens
TWD695.00
Each
units
PLC I/O Module ET200S Series SIMATIC 81 x 15 x 52 mm - - Current, Potential, Voltage - - - - - - -
RS Stock No. 608-5984
Mfr. Part No.ABE7H20E100
TWD7,404.00
Each
units
Base Modicon Premium, Modicon TSX - - - - - - - - - - - -
RS Stock No. 888-7903
Mfr. Part No.G4OAC5A
BrandOpto 22
TWD723.00
Each
units
PLC I/O Module - - 48.8 x 12.2 x 41.1 mm Digital PCB Mount Digital AC Voltage - 1 3 A +70°C 5 V dc AC Relays, Heaters, Indicators, Lamps, Motor Starters, Solenoids -
RS Stock No. 857-6344
Mfr. Part No.2302670
TWD5,332.00
Each
units
Cable & Connector Mitsubishi Melsec Q - - - - - - - - - - - 3m
RS Stock No. 468-5835
Mfr. Part No.6ES7901-3DB30-0XA0
BrandSiemens
TWD9,015.00
Each
units
Cable 6ES Series - - - - - - - - - - - -
RS Stock No. 320-9143
Mfr. Part No.FX2N-48ER-ES/UL
BrandMitsubishi
TWD19,735.00
Each
units
PLC I/O Module FX2N Series - 90 x 150 x 87 mm - - - - 24 - - - - -
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 - - Analogue - 2 (Channel) - - - - -