PLC Modules for Sale in South Africa

Industrial PLC Modules, PLC I/O Modules & Automation Spare Parts

Nkokhi Group supplies PLC Modules for Sale in South Africa, providing sourcing solutions for industrial automation, manufacturing, mining, water treatment, power generation, process control, OEM machinery and infrastructure projects.

We supply and source a wide range of PLC modules, PLC I/O modules, CPU modules, communication modules, analogue input modules, analogue output modules, digital input modules, digital output modules, power supply modules, remote I/O modules, expansion modules and industrial automation spare parts.

Whether you need a replacement module for an existing control system, an obsolete PLC module, a hard-to-find automation component or modules for a new automation project, Nkokhi Group can assist with sourcing from local and international supply channels.

Looking for PLC Modules for Sale?

Send us the PLC manufacturer, complete part number, model number, quantity and photographs of the existing module. We can check availability and provide a quotation.

Nkokhi Group – PLC Modules & Industrial Automation Parts Supplier

PLC Modules South Africa

Finding the correct PLC module in South Africa can be challenging when equipment is obsolete, discontinued or urgently required to restore production.

Nkokhi Group assists customers with sourcing:

• PLC CPU Modules
• PLC Processor Modules
• Digital Input Modules
• Digital Output Modules
• Analogue Input Modules
• Analogue Output Modules
• Mixed I/O Modules
• Relay Output Modules
• Transistor Output Modules
• Temperature Input Modules
• High-Speed Counter Modules
• Motion Control Modules
• Safety PLC Modules
• Communication Modules
• Ethernet Modules
• PROFINET Modules
• PROFIBUS Modules
• EtherNet/IP Modules
• Modbus Modules
• CANbus Modules
• Remote I/O Modules
• Distributed I/O Modules
• Expansion Modules
• PLC Power Supply Modules
• Backplanes and Racks
• Interface Modules
• Industrial Communication Gateways

Our sourcing service is particularly useful for customers looking for PLC spare parts, replacement PLC modules and obsolete PLC modules.

PLC Module Models We Supply and Source

We work with a wide range of PLC platforms and module families.

Siemens PLC Modules

Siemens SIMATIC is one of the most widely encountered PLC platforms in industrial automation.

Siemens SIMATIC S7-1200

Common models and associated module families include:

• CPU 1211C
• CPU 1212C
• CPU 1214C
• CPU 1215C
• CPU 1217C
• SM Digital Input Modules
• SM Digital Output Modules
• SM Analogue Input Modules
• SM Analogue Output Modules
• Communication Modules
• Signal Boards
• Signal Modules

Siemens SIMATIC S7-1500

We source and supply:

• S7-1500 CPU modules
• DI modules
• DO modules
• AI modules
• AO modules
• Technology modules
• Communication modules
• Interface modules
• Power supply modules
• ET 200SP I/O modules
• ET 200MP modules

Siemens S7-300

Commonly encountered modules include:

• CPU 312
• CPU 313
• CPU 314
• CPU 315
• CPU 316
• CPU 317
• CPU 318
• SM321 Digital Input
• SM322 Digital Output
• SM331 Analogue Input
• SM332 Analogue Output
• CP communication processors
• IM interface modules
• PS power supply modules

Siemens S7-400

We can source:

• S7-400 CPUs
• Digital I/O modules
• Analogue I/O modules
• Communication processors
• Interface modules
• Power supply modules
• Rack components

We also source Siemens ET 200 distributed I/O systems.

Allen-Bradley / Rockwell Automation PLC Modules

Nkokhi Group supplies and sources Allen-Bradley and Rockwell Automation PLC components for industrial control systems.

ControlLogix

Common ControlLogix components include:

• ControlLogix CPU modules
• Digital Input modules
• Digital Output modules
• Analogue Input modules
• Analogue Output modules
• Communication modules
• EtherNet/IP modules
• DeviceNet modules
• Redundancy modules
• Specialty I/O modules
• Power supplies
• Chassis and accessories

ControlLogix is used extensively in large industrial automation and process-control applications.

CompactLogix

We source:

• CompactLogix CPUs
• Compact I/O modules
• Digital I/O
• Analogue I/O
• Communication modules
• Ethernet modules
• Specialty modules
• Power supplies

Other Rockwell / Allen-Bradley Platforms

Depending on availability, we can also source:

• MicroLogix
• PLC-5
• SLC 500
• Flex I/O
• POINT I/O
• GuardLogix
• Compact GuardLogix

For legacy systems, provide the complete Allen-Bradley part number before ordering.

Schneider Electric Modicon PLC Modules

Nkokhi Group supplies and sources Schneider Electric Modicon PLC modules for machine automation, process control, water treatment, infrastructure and industrial applications.

Modicon M221

• CPU/controllers
• TM3 expansion modules
• Digital I/O
• Analogue I/O
• Communication modules

Modicon M241

• CPU modules
• TM3 I/O modules
• Communication modules
• Analogue modules
• Digital modules

Modicon M251

• Controller modules
• I/O expansion
• Communication modules

Modicon M340

• BMX CPU modules
• BMX digital I/O
• BMX analogue I/O
• BMX communication modules
• BMX power supplies
• BMX racks and accessories

Modicon M580

• M580 ePAC processors
• X80 I/O modules
• Digital I/O
• Analogue I/O
• Communication modules
• Ethernet modules
• Power supplies
• Redundancy components

Schneider’s current portfolio includes Modicon M221, M241, M251, M262, M340 and M580 families, as well as X80 and distributed I/O platforms.

Mitsubishi PLC Modules

We source Mitsubishi MELSEC PLC modules for industrial automation and machine-control applications.

Mitsubishi MELSEC iQ-R

• CPU modules
• Digital I/O
• Analogue I/O
• Network modules
• Communication modules
• Motion modules
• Safety modules
• Power supply modules

Mitsubishi MELSEC iQ-F

• FX5U
• FX5UC
• FX5UJ
• Expansion I/O
• Analogue modules
• Communication modules

Mitsubishi FX Series

• FX3U
• FX3G
• FX3S
• FX5U
• FX5UC
• Expansion modules
• Communication modules

Mitsubishi Q Series

• QCPU
• Digital I/O
• Analogue I/O
• Communication modules
• Positioning modules
• Network modules
• Power supply modules

Omron PLC Modules

Nkokhi Group can source Omron PLC and automation components.

Omron CJ Series

• CJ1 CPU modules
• Digital I/O
• Analogue I/O
• Communication modules
• Positioning modules
• Serial communication modules
• Ethernet modules

Omron CS Series

• CS1 CPU
• Digital I/O
• Analogue I/O
• Communication modules
• Special-function modules

Omron NX / NJ Series

• NX-series I/O
• NJ-series controllers
• NX digital I/O
• NX analogue I/O
• EtherCAT modules
• Communication modules
• Safety I/O

ABB PLC Modules

We supply and source ABB automation components, including:

ABB AC500

• CPU modules
• Digital I/O
• Analogue I/O
• Communication modules
• Safety modules
• Expansion modules
• Power supplies

ABB S500 I/O

• Digital input modules
• Digital output modules
• Analogue input modules
• Analogue output modules
• Communication modules

Legacy ABB Automation

We can also assist with sourcing selected legacy ABB automation components where available.

Beckhoff PLC & I/O Modules

Beckhoff uses PC-based control and distributed I/O architectures extensively in modern automation.

Common components include:

• Beckhoff CX controllers
• EL Series EtherCAT terminals
• EK EtherCAT couplers
• Digital I/O terminals
• Analogue I/O terminals
• Safety I/O
• Communication terminals
• Power supply terminals
• EtherCAT components

WAGO PLC & I/O Modules

We source WAGO automation components including:

• WAGO PFC controllers
• WAGO PLC modules
• WAGO 750 Series I/O
• Digital I/O
• Analogue I/O
• Relay modules
• Communication modules
• Ethernet modules
• Fieldbus modules
• Power supply modules

Phoenix Contact PLC Modules

Available on request:

• PLCnext controllers
• Axioline I/O
• Inline I/O
• Digital I/O
• Analogue I/O
• Communication modules
• Ethernet modules
• Interface modules
• Safety modules

Other PLC Manufacturers We Can Source

Depending on your application and required part number, Nkokhi Group can also source PLC and industrial automation components from:

• Delta
• Fatek
• Keyence
• Panasonic
• GE / Emerson
• Honeywell
• Yokogawa
• B&R
• CODESYS-compatible platforms
• Unitronics
• Schneider Electric
• Rockwell Automation
• Siemens
• Mitsubishi Electric
• Omron
• ABB
• Beckhoff
• WAGO
• Phoenix Contact
• Advantech
• IDEC
• LS Electric
• INVT
• Weintek

The major PLC ecosystem commonly encountered in industrial automation includes Siemens, Rockwell Automation/Allen-Bradley, Schneider Electric, Mitsubishi Electric, Omron, ABB and Beckhoff, with additional suppliers serving specific machine, process and OEM applications.

Major PLC Module Manufacturers

Manufacturer	Popular PLC / Module Families
Siemens	S7-1200, S7-1500, S7-300, S7-400, ET 200
Rockwell Automation / Allen-Bradley	ControlLogix, CompactLogix, GuardLogix, MicroLogix, POINT I/O
Schneider Electric	Modicon M221, M241, M251, M340, M580, X80
Mitsubishi Electric	MELSEC iQ-R, iQ-F, FX, Q Series
Omron	CJ, CS, NJ, NX
ABB	AC500, S500 I/O
Beckhoff	CX, EL, EK, EtherCAT
WAGO	PFC, 750 Series
Phoenix Contact	PLCnext, Axioline, Inline
Keyence	KV Series
Delta	DVP, AS Series
B&R	X20, X90
GE / Emerson	PACSystems
Honeywell	Control systems and I/O platforms
Yokogawa	CENTUM and industrial control I/O

Types of PLC Modules for Sale

1. PLC CPU Modules

The CPU is the main processing component of a PLC system.

We source:

• Standard CPUs
• High-performance CPUs
• Redundant CPUs
• Safety CPUs
• Motion CPUs
• Communication processors

2. Digital Input Modules

Digital input modules receive ON/OFF signals from field devices such as:

• Proximity sensors
• Limit switches
• Push buttons
• Pressure switches
• Float switches
• Emergency-stop circuits
• Machine feedback signals

3. Digital Output Modules

Digital output modules control:

• Solenoid valves
• Contactors
• Relays
• Motor starters
• Indicator lamps
• Alarms
• Actuators

4. Analogue Input Modules

Analogue inputs are commonly used for:

• Pressure
• Temperature
• Flow
• Level
• Weight
• Speed
• Position

Typical signals include:

• 4–20 mA
• 0–10 V
• ±10 V
• RTD
• Thermocouple

5. Analogue Output Modules

Analogue outputs can control:

• Variable-speed drives
• Control valves
• Actuators
• Positioners
• Process equipment

Common signals include 4–20 mA and 0–10 V.

6. Communication Modules

We source communication modules for:

• Ethernet
• PROFINET
• PROFIBUS
• EtherNet/IP
• Modbus TCP
• Modbus RTU
• CANbus
• DeviceNet
• EtherCAT
• Serial RS-232
• RS-485

7. Remote I/O Modules

Remote I/O allows field devices to be connected away from the main PLC cabinet.

These are widely used in:

• Mining
• Water treatment
• Manufacturing
• Power plants
• Oil & gas
• Conveyor systems
• Process plants

PLC Modules for Mining

Nkokhi Group supplies and sources PLC modules for mining automation systems, including applications such as:

• Crushers
• Conveyors
• Screening plants
• Pumps
• Dewatering systems
• Wash plants
• Process plants
• Material handling
• Hoists
• Ventilation systems
• Water treatment
• Heavy industrial machinery

For mining environments, selecting the correct module is important because replacement components must match the existing PLC architecture, firmware, communications network and field wiring.

PLC Modules for Water Treatment Plants

PLC modules are essential components of automated water and wastewater treatment systems.

We can source PLC components for:

• RO plants
• Water purification
• Pump stations
• Chemical dosing
• Filtration systems
• Clarification
• UV systems
• Chlorination
• Level control
• Flow monitoring
• Pressure control
• SCADA systems

PLC I/O modules can interface with instruments such as flow meters, pressure transmitters, level sensors, conductivity meters, pH instruments and motorised valves.

PLC Modules for Industrial Automation

Our PLC modules can be sourced for:

• Manufacturing
• Packaging
• Food processing
• Mining
• Cement plants
• Steel plants
• Water utilities
• Power generation
• Agriculture
• Material handling
• Conveyor systems
• OEM machinery
• Process automation
• Building automation
• Pump control

New, Refurbished & Obsolete PLC Modules

Depending on availability and customer requirements, Nkokhi Group can assist with sourcing:

New PLC Modules

Suitable for new installations, upgrades and critical replacements.

Refurbished PLC Modules

A practical option where a replacement module is obsolete or difficult to obtain.

Refurbished equipment should be properly inspected and tested before installation.

Obsolete PLC Modules

Legacy automation systems can remain operational for many years. When original manufacturers discontinue a product, sourcing a compatible replacement or tested legacy module may be necessary.

Nkokhi Group specialises in sourcing hard-to-find and obsolete industrial automation components.

How to Order PLC Modules from Nkokhi Group

For an accurate quotation, send us as much information as possible:

1. Manufacturer

Example: Siemens, Allen-Bradley, Schneider, Mitsubishi, Omron or ABB.

2. Complete Part Number

The complete part number is extremely important.

3. Model Number

Include the PLC family and module model.

4. Quantity

Specify how many modules are required.

5. Photographs

Send clear photographs showing:

• Front label
• Side label
• Part number
• Serial number
• Terminal arrangement
• Connectors

6. Application

Tell us what the PLC module is controlling, if known.

7. Delivery Location

Provide the delivery location in South Africa.

Tips for Buying PLC Modules

Tip 1 – Always confirm the complete part number

PLC modules can look almost identical while having completely different electrical specifications.

Tip 2 – Check firmware compatibility

Some PLC CPUs and communication modules require specific firmware versions.

Tip 3 – Confirm I/O specifications

Check:

• Voltage
• Current
• Input type
• Output type
• Number of channels
• Isolation
• Signal type

Tip 4 – Confirm communication protocol

Make sure the replacement communication module supports the network used by your PLC system.

Tip 5 – Check whether the PLC is obsolete

For older systems, sourcing a tested refurbished module may be an alternative where new stock is unavailable.

Tip 6 – Send photographs

A photograph of the original module can significantly reduce identification errors.

Tip 7 – Keep critical spare modules

For production-critical equipment, maintaining strategic PLC spares can reduce downtime.

Tip 8 – Do not replace a module based only on appearance

Always compare the complete part number and technical specifications.

Why Choose Nkokhi Group for PLC Modules?

Nkokhi Group provides sourcing solutions for industrial automation and PLC spare parts across South Africa.

Our PLC sourcing service includes:

✔ PLC module sourcing
✔ Hard-to-find automation components
✔ Obsolete PLC module sourcing
✔ New and refurbished options where available
✔ Local and international supplier sourcing
✔ Industrial automation spare parts
✔ PLC I/O modules
✔ Communication modules
✔ CPU and processor modules
✔ Remote I/O
✔ SCADA-related hardware
✔ Industrial networking components

Our existing automation offering includes Siemens, ABB, Rockwell Automation/ControlLogix and Schneider Electric platforms, including CPU, digital/analogue I/O, communication and power-supply modules.

PLC Module Supplier South Africa

If you are searching for:

PLC Modules for Sale South Africa
PLC Modules South Africa
PLC I/O Modules
Industrial PLC Modules
PLC Spare Parts South Africa
PLC Module Supplier South Africa
PLC Replacement Modules
Siemens PLC Modules
Allen-Bradley PLC Modules
Schneider PLC Modules
Mitsubishi PLC Modules
Omron PLC Modules
ABB PLC Modules
Beckhoff PLC Modules
PLC Communication Modules
PLC Digital Input Modules
PLC Digital Output Modules
PLC Analogue Input Modules
PLC Analogue Output Modules

Contact Nkokhi Group with the part number and required quantity.

Frequently Asked Questions – PLC Modules

What is a PLC module?

A PLC module is a hardware component that forms part of a programmable logic controller system. Depending on its function, it can process logic, receive inputs, control outputs, communicate with other equipment or provide specialised functions.

What PLC modules do you supply?

We source CPU modules, digital I/O, analogue I/O, communication modules, power supplies, remote I/O, expansion modules, interface modules and other PLC components.

Do you supply Siemens PLC modules?

Yes. We can source Siemens SIMATIC modules including S7-1200, S7-1500, S7-300, S7-400 and ET 200 components, subject to availability.

Do you supply Allen-Bradley PLC modules?

Yes. We source ControlLogix, CompactLogix and other Allen-Bradley/Rockwell Automation components.

Can you source Schneider Modicon modules?

Yes. We can source Modicon M221, M241, M251, M340, M580, X80 and associated I/O and communication modules.

Can you source obsolete PLC modules?

Yes. Nkokhi Group assists with sourcing obsolete, discontinued and hard-to-find PLC modules through international and specialist supply channels.

Do you supply refurbished PLC modules?

Where available, we can source refurbished PLC modules. The condition and testing status should be confirmed before purchase.

How do I identify my PLC module?

Send us clear photographs of the module label and provide the complete part number, PLC model and quantity required.

Can you supply PLC modules for mining?

Yes. We source PLC and industrial automation components for mining, processing, conveyors, pumps, material handling and other industrial applications.

Can you supply PLC modules for water treatment?

Yes. PLC modules can be sourced for water treatment, RO plants, pump stations, filtration, chemical dosing and SCADA applications.

Can you source PLC communication modules?

Yes. We can source Ethernet, PROFINET, PROFIBUS, EtherNet/IP, Modbus, CANbus, DeviceNet, EtherCAT and other communication modules depending on the PLC platform.

Can you supply PLC modules anywhere in South Africa?

Yes. Nkokhi Group supplies customers across South Africa, subject to product availability and delivery arrangements.

Request a PLC Module Quote

Need a PLC module urgently?

Send Nkokhi Group:

Manufacturer:
PLC Model:
Module Part Number:
Description:
Quantity:
New / Refurbished:
Delivery Location:
Photographs:

Our team can check the required PLC module availability and sourcing options and provide a quotation.

Nkokhi Group

PLC Modules | Industrial Automation | PLC Spare Parts | SCADA | Control Systems

Serving customers across South Africa with sourcing solutions for industrial automation components.

Request a Quote Today