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. 825-1704
Mfr. Part No.6ED1058-0BA08-0YA1
BrandSiemens
£45.00
Each
Units
PLC Programming Software LOGO! 8 Series - - - - - - - - - - - -
RS Stock No. 798-3056
Mfr. Part No.6GK1571-0BA00-0AA0
BrandSiemens
£366.00
Each
Units
PC Adapter SIMATIC S7 - - - - - - - - - - - -
RS Stock No. 848-7824
Mfr. Part No.6ES7971-0BA00
BrandSiemens
£16.59
Each
Units
Back Up Battery PS 405/PS 407 Power Supply - - - - - - - - - - - -
RS Stock No. 612-9084
Mfr. Part No.6ES7334-0CE01-0AA0
BrandSiemens
£329.69
Each
Units
PLC I/O Module SIMATIC S7-300 Series SIMATIC 125 x 40 x 120 mm PSI-DATA/BASIC-MODEM/RS232 Analogue - - - Analogue - - - -
RS Stock No. 628-888
Mfr. Part No.6ES7971-1AA00-0AA0
BrandSiemens
£16.00
Each
Units
Battery S5-90U Series, SIMATIC S7-300 Series - - - - - - - - - - - -
RS Stock No. 612-9078
Mfr. Part No.6ES7331-7HF01-0AB0
BrandSiemens
£770.00
Each
Units
PLC I/O Module SIMATIC S7-300 Series SIMATIC 125 x 40 x 120 mm GRT1 Analogue - - - - - - - -
RS Stock No. 746-6621
Mfr. Part No.6ES7331-7KB02-0AB0
BrandSiemens
£221.00
Each
Units
PLC I/O Module SIMATIC S7-300 Series SIMATIC 125 x 40 x 120 mm SM 1222 Analogue - - - - - - - -
RS Stock No. 662-3561
Mfr. Part No.6ES7138-4CA01-0AA0
BrandSiemens
£17.00
Each
Units
PLC I/O Module ET200S Series SIMATIC 81 x 15 x 52 mm MicroLogix 1762 - - - - Current, Potential, Voltage - - - -
RS Stock No. 468-5835
Mfr. Part No.6ES7901-3DB30-0XA0
BrandSiemens
£220.69
Each
Units
Cable 6ES Series - - - - - - - - - - - -
RS Stock No. 746-6612
Mfr. Part No.6ES7331-1KF02-0AB0
BrandSiemens
£483.00
Each
Units
PLC Expansion Module S7-300 Series - 125 x 40 x 117 mm - Analogue - - - - - - - -
RS Stock No. 735-2904
Mfr. Part No.6ES7241-1CH30-1XB0
BrandSiemens
£81.00
Each
Units
PLC I/O Module S7-1200 Series SIMATIC - - - - - - - - - - -
RS Stock No. 453-2545
Mfr. Part No.6ES7331-7KF02-0AB0
BrandSiemens
£766.00
Each
Units
PLC Expansion Module S7-300 Series - 125 x 40 x 120 mm SIMATIC S7-300 Series Analogue - - - - - - - -
RS Stock No. 453-2573
Mfr. Part No.6ES7392-1AJ00-0AA0
BrandSiemens
£27.00
Each
Units
Connector CP 343-2, CP 343-2P, SIMATIC S7 Series - - - - - - - - - - - -
RS Stock No. 453-2589
Mfr. Part No.6ES7392-1AM00-0AA0
BrandSiemens
£43.00
Each
Units
Connector SIMATIC S7-300 Series - - - - - - - - - - - -
RS Stock No. 787-7986
Mfr. Part No.6ES7234-4HE32-0XB0
BrandSiemens
£319.00
Each
Units
PLC I/O Module SIMATIC S7-1200 Series SIMATIC 100 x 45 x 75 mm TM3 Analogue - - - Analogue - - - -
RS Stock No. 662-3167
Mfr. Part No.6ES7131-4BD01-0AA0
BrandSiemens
£29.77
Each
Units
PLC I/O Module SIMATIC ET 200S Series SIMATIC 81 x 15 x 52 mm 6ES7 Digital - - - - - - - -
RS Stock No. 787-7967
Mfr. Part No.6ES7223-1BL32-0XB0
BrandSiemens
£268.00
Each
Units
PLC I/O Module SIMATIC S7-1200 Series SIMATIC 100 x 70 x 75 mm TM3 Digital - - - Digital - - - -
RS Stock No. 453-2618
Mfr. Part No.6ES7321-1BL00-0AA0
BrandSiemens
£368.00
Each
Units
Input Relay Module S7-300 Series SIMATIC 125 x 40 x 120 mm SIMATIC S7-300 Series Digital - - - - - - - -
RS Stock No. 746-6640
Mfr. Part No.6ES7332-5HF00-0AB0
BrandSiemens
£1,095.00
Each
Units
Analogue Module S7-300 Series - 125 x 40 x 120 mm - - - - - Analogue - - - -
RS Stock No. 453-2624
Mfr. Part No.6ES7322-1BL00-0AA0
BrandSiemens
£509.00
Each
Units
PLC I/O Module S7-300 Series SIMATIC 125 x 40 x 120 mm SIMATIC S7-300 Series - - - - Digital - - - -