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. 612-9084
Mfr. Part No.6ES7334-0CE01-0AA0
BrandSiemens
HK$4,790.78
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. 340-1939
Mfr. Part No.AL-232CAB
BrandMitsubishi
HK$671.16
Each
units
Cable Alpha Series - - - - - - - - - - - -
RS Stock No. 453-2624
Mfr. Part No.6ES7322-1BL00-0AA0
BrandSiemens
HK$5,778.33
Each
units
PLC I/O Module S7-300 Series SIMATIC 125 x 40 x 120 mm SIMATIC S7-300 Series - - - - Digital - - - -
RS Stock No. 468-5835
Mfr. Part No.6ES7901-3DB30-0XA0
BrandSiemens
HK$2,696.75
Each
units
Cable 6ES Series - - - - - - - - - - - -
RS Stock No. 453-2517
Mfr. Part No.6ES7321-1BH02-0AA0
BrandSiemens
HK$2,034.92
Each
units
Digital Input Expansion Module SIMATIC S7-300 Series SIMATIC 125 x 40 x 120 mm SIMATIC S7-300 Series Digital - - - - - - - -
RS Stock No. 855-1455
Mfr. Part No.2897253
HK$6,702.20
1 Box of 4
Box(es)
PLC I/O Module - - 119.8 x 48.8 x 71.5 mm - - - - - Digital - - - -
RS Stock No. 615-2365
Mfr. Part No.SR2USB01
HK$1,103.17
Each
units
Cable Zelio Logic 2 - - Zelio - Plug-In - - - 3m - - -
RS Stock No. 453-2618
Mfr. Part No.6ES7321-1BL00-0AA0
BrandSiemens
HK$4,069.84
Each
units
Input Relay Module S7-300 Series SIMATIC 125 x 40 x 120 mm SIMATIC S7-300 Series Digital - - - - - - - -
RS Stock No. 453-2567
Mfr. Part No.6ES7390-1AF30-0AA0
BrandSiemens
HK$516.99
Each
units
Mounting Rail SIMATIC S7-300 Series - - - - - - - - - - - -
RS Stock No. 469-2271
Mfr. Part No.SR2SFT01
HK$634.42
Each
units
PLC Programming Software Zelio Logic 2 - - - - - - - - - - - -
RS Stock No. 510-1502
Mfr. Part No.CJ1W-PA205R
BrandOmron
HK$4,142.36
Each
units
PLC Power Supply CJ1M Series - 81.6 x 90 x 80 mm CJ1W - - - - - - - - -
RS Stock No. 825-1704
Mfr. Part No.6ED1058-0BA08-0YA1
BrandSiemens
HK$638.67
Each
units
PLC Programming Software LOGO! 8 Series - - - - - - - - - - - -
RS Stock No. 148-161
Mfr. Part No.BMXP342020
HK$13,183.18
Each
units
PLC Expansion Module Modicon M340 - - - Analogue, Discrete - - - Analogue, Discrete - - - -
RS Stock No. 901-0826
Mfr. Part No.2903805
HK$5,769.58
Each
units
Interface Unit PSI Modem SMS Relay - 71.6 x 62.2 x 89.7 mm - Analogue, Digital - Mobile Communication DIN Rail Relay - - - -
RS Stock No. 882-0322
Mfr. Part No.758-915
BrandWago
HK$4,591.98
Each
units
Interface Unit 750 Series - 66 x 91 x 36.2 mm SNAP - - Communication - - - - - -
RS Stock No. 901-0817
Mfr. Part No.2903806
HK$7,390.85
Each
units
Interface Unit PSI Modem SMS Relay - 71.6 x 62.2 x 89.7 mm - Digital - Mobile Communication DIN Rail Relay - - - -
RS Stock No. 147-764
Mfr. Part No.BMXXCAUSBH018
HK$546.52
Each
units
Terminal Modicon M340 - - - - - - - - - - - -
RS Stock No. 512-5895
Mfr. Part No.CJ1W-OC211
BrandOmron
HK$4,477.19
Each
units
PLC I/O Module SYSMAC CJ Series - 89 x 31 x 95.4 mm SYSMAC CJ Series - - - - Digital, Relay - - - -
RS Stock No. 746-6722
Mfr. Part No.6ES7361-3CA01-0AA0
BrandSiemens
HK$2,732.61
Each
units
PLC I/O Module S7-300 Series SIMATIC 125 x 80 x 120 mm - - - - - - - - - -
RS Stock No. 746-5356
Mfr. Part No.6XV1440-4AN10
BrandSiemens
HK$4,534.96
Each
units
Cable 277 Series Mobile Panel - - - - - - - - - - - -