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. 787-7986
Mfr. Part No.6ES7234-4HE32-0XB0
BrandSiemens
TWD12,122.00
Each
units
PLC I/O Module SIMATIC S7-1200 Series SIMATIC 100 x 45 x 75 mm TM3 Analogue - - - Analogue - - - -
RS Stock No. 705-4925
Mfr. Part No.FX3U-4AD
BrandMitsubishi
TWD12,275.00
Each
units
PLC I/O Module MELSEC FX Series - 90 x 55 x 87 mm - Analogue - - - - - - - -
RS Stock No. 365-2250
Mfr. Part No.CS1WCN226
BrandOmron
TWD6,797.00
Each
units
Cable CS1W Series - - - - - - - - - - - -
RS Stock No. 806-7010
Mfr. Part No.TM3AI2H
TWD10,143.00
Each
units
PLC I/O Module Modicon M221, Modicon M241, Modicon M251 - 90 x 23.6 x 70 mm - Current, Voltage - - - - - - - -
RS Stock No. 875-5745
Mfr. Part No.FX5-CNV-BUS
BrandMitsubishi
TWD1,509.00
Each
units
Bus Coupler FX5U CPU Module, FX5UC CPU Module - 16 x 90 x 83 mm FX5 Current, Voltage - - Panel Mount - - - - -
RS Stock No. 868-7359
Mfr. Part No.750-461/003-000
BrandWago
TWD9,146.00
Each
units
PLC I/O Module - - 64 x 12 x 100 mm G4 Analogue - Marine DIN Rail Voltage - - - -
RS Stock No. 122-1520
Mfr. Part No.0007-0018
BrandBARTH
TWD357.00
Each
units
Bracket Mini-PLC STG-600 / 650 - - HA-18 - Screw Mini-PLC - - - - - -
RS Stock No. 453-2589
Mfr. Part No.6ES7392-1AM00-0AA0
BrandSiemens
TWD1,847.00
Each
units
Connector SIMATIC S7-300 Series - - - - - - - - - - - -
RS Stock No. 492-963
Mfr. Part No.FX2N-2DA
BrandMitsubishi
TWD14,254.00
Each
units
PLC I/O Module FX1N Series, FX3G Series, FX3U Series - 90 x 55 x 87 mm - - - - - Analogue - - - -
RS Stock No. 539-0881
Mfr. Part No.FX3U-485-BD
BrandMitsubishi
TWD5,442.00
Each
units
Base FX3 Series - - - - - - - - - - - -
RS Stock No. 662-3561
Mfr. Part No.6ES7138-4CA01-0AA0
BrandSiemens
TWD851.00
Each
units
PLC I/O Module ET200S Series SIMATIC 81 x 15 x 52 mm MicroLogix 1762 - - - - Current, Potential, Voltage - - - -
RS Stock No. 608-5984
Mfr. Part No.ABE7H20E100
TWD7,774.00
Each
units
Base Modicon Premium, Modicon TSX - - - - - - - - - - - -
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 FX3U Series Analogue - - - - - - - -
RS Stock No. 453-2573
Mfr. Part No.6ES7392-1AJ00-0AA0
BrandSiemens
TWD1,171.00
Each
units
Connector CP 343-2, CP 343-2P, SIMATIC S7 Series - - - - - - - - - - - -
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 - - - -
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. 453-2646
Mfr. Part No.6ES7322-5HF00-0AB0
BrandSiemens
TWD10,758.00
Each
units
PLC I/O Module S7-300 Series SIMATIC 125 x 40 x 120 mm SIMATIC S7-300 Series - - - - Digital, Relay - - - -
RS Stock No. 746-6081
Mfr. Part No.3RX9503-0BA00
BrandSiemens
TWD18,647.00
Each
units
PLC Power Supply AS-I Power Supply Unit - 125 x 120 x 125 mm 3RX950 - - - - - - - - -
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. 455-6901
Mfr. Part No.QJ61BT11N
BrandMitsubishi
TWD8,559.00
Each
units
Control Network Module CC Link Controller Network - - - - - - - - - - - -