ABB PLC Modules for Sale in South Africa

ABB PLC Modules, Controllers & I/O Modules Supplier – Nkokhi Group

Nkokhi Group supplies ABB PLC modules, ABB PLC spare parts, controllers, communication modules, digital I/O modules, analogue I/O modules, power supply modules and industrial automation components in South Africa.

We support customers looking for ABB PLC modules for sale, replacement automation modules, obsolete ABB PLC hardware, industrial control components and replacement I/O modules for existing automation systems.

Whether you are maintaining a manufacturing plant, water treatment facility, mining operation, processing plant, power installation or industrial production line, Nkokhi Group can assist with sourcing the required ABB PLC module or automation component.

We supply new, surplus, used, refurbished and reconditioned automation equipment subject to availability.

Need an ABB PLC module? Send us the ABB part number, model number, photograph or existing module details for a quotation.

ABB PLC Modules Supplier South Africa

Finding the correct ABB PLC spare part in South Africa can be challenging, particularly for older or discontinued automation systems.

Nkokhi Group assists businesses with sourcing a wide range of ABB PLC modules and industrial automation equipment, including:

• ABB PLC CPU modules
• ABB PLC processor modules
• ABB digital input modules
• ABB digital output modules
• ABB analogue input modules
• ABB analogue output modules
• ABB mixed I/O modules
• ABB communication modules
• ABB Ethernet modules
• ABB PROFIBUS modules
• ABB PROFINET modules
• ABB Modbus modules
• ABB power supply modules
• ABB interface modules
• ABB S800 I/O modules
• ABB S800L I/O modules
• ABB S500 I/O modules
• ABB AC500 PLC modules
• ABB AC 800M modules
• ABB Select I/O modules
• ABB System 800xA hardware
• ABB PLC accessories
• ABB PLC replacement parts

ABB’s current automation portfolio includes modular AC 800M controllers, S800/S800L I/O systems, Select I/O and AC500-related I/O products.

ABB PLC Models & Module Families

ABB AC500 PLC

The ABB AC500 is a scalable PLC platform used for industrial automation and machine control applications.

Nkokhi Group can assist with sourcing:

• AC500 CPU modules
• AC500 communication modules
• AC500 I/O modules
• Digital I/O
• Analogue I/O
• Power supplies
• Interface modules
• Expansion modules
• Safety-related automation components

ABB S500 I/O Modules

The ABB S500 I/O range includes modular digital and analogue I/O solutions for AC500 PLC systems.

ABB identifies several S500 variants, including:

S500-eCo

Designed for basic automation and cost-sensitive applications.

S500

Standard modular I/O for general automation requirements.

S500-S Safety

Safety I/O designed for functional-safety applications.

S500-XC

Designed for demanding environments involving conditions such as temperature, vibration and EMC exposure.

ABB AC 800M PLC Modules

Nkokhi Group also supplies and sources ABB AC 800M PLC modules for process automation applications.

The AC 800M family includes:

• CPU / processor modules
• Communication modules
• Power supply modules
• CEX bus modules
• Interface modules
• S800 I/O interfaces
• PROFIBUS interfaces
• PROFINET interfaces
• Ethernet communication modules
• Modbus communication modules
• IEC 61850 communication modules
• DeviceNet interfaces
• Foundation Fieldbus interfaces

ABB describes AC 800M as a modular, DIN-rail-mounted controller family with multiple CPU options and support for controller and network redundancy.

Common ABB AC 800M Models

Examples include:

• PM851
• PM851A
• PM856
• PM856A
• PM857
• PM857A
• PM860
• PM861
• PM862
• PM864
• PM865
• PM866
• PM867
• PM891
• AC 800M High Integrity controllers

Important: Exact compatibility depends on the controller revision, firmware, I/O architecture and existing system configuration.

ABB S800 I/O Modules

ABB S800 I/O modules are widely used in distributed process-control installations.

S800 I/O provides modular distributed I/O and can communicate with parent controllers through industry-standard fieldbus technologies. ABB’s hardware selector includes a broad range of analogue, digital, communication and specialised I/O modules.

ABB S800 I/O Module Examples

Common module families include:

• AI801
• AI810
• AI815
• AI820
• AI825
• AI830A
• AI835A
• DI810
• DI811
• DI814
• DI818
• DO810
• DO814
• DO820
• DO821
• AO810
• AO820
• AO835
• CI801
• CI840A
• CI845
• TB820
• TB825
• TB826
• TB840A
• TB842
• TU807
• TU840
• TU841
• TU846
• TU847
• TU848
• TU849

Actual specifications and compatibility vary by module and system revision, so always provide the complete part number before ordering. ABB’s current hardware selector lists the relevant S800 communication interfaces and termination units.

ABB Select I/O Modules

ABB Select I/O is an Ethernet-networked, single-channel I/O system designed for the ABB Ability™ System 800xA automation platform.

Select I/O is particularly useful for applications requiring granular I/O architecture and flexible cabinet design. ABB states that Select I/O uses Signal Conditioning Modules mounted in Module Termination Units.

Nkokhi Group can assist with sourcing:

• Select I/O modules
• Communication modules
• Signal conditioning modules
• Terminal units
• Interface modules
• Ethernet-based I/O components
• Select I/O accessories

ABB Communication Modules

Communication modules allow PLC and process-control systems to communicate with field devices, remote I/O and third-party equipment.

Depending on the ABB platform, available communication technologies include:

• Ethernet
• Modbus TCP
• Modbus RTU
• PROFIBUS DP
• PROFINET
• DeviceNet
• EtherNet/IP
• IEC 61850
• Foundation Fieldbus
• ABB ModuleBus
• ABB DriveBus
• MasterBus
• S100 I/O
• S800 I/O
• Satt I/O

For example, ABB’s AC 800M communication portfolio includes modules such as CI853, CI854B, CI855, CI856, CI857, CI858, CI860, CI867A, CI868A, CI869, CI871A, CI873 and CI874.

ABB PLC Digital I/O Modules

Digital I/O modules are used to interface PLC systems with on/off field devices.

Applications include:

• Proximity sensors
• Limit switches
• Push buttons
• Solenoid valves
• Contactors
• Relays
• Motor starters
• Alarm signals
• Interlocks
• Machine status signals

Nkokhi Group can source ABB digital input (DI) and digital output (DO) modules for replacement and expansion applications.

ABB PLC Analogue I/O Modules

Analogue I/O modules allow PLCs and control systems to interface with continuously varying process signals.

Common industrial signals include:

• 4–20 mA
• 0–10 V
• 0–5 V
• RTD
• Thermocouple
• HART-enabled signals

Typical applications include:

• Pressure measurement
• Flow measurement
• Level measurement
• Temperature measurement
• Speed control
• Valve positioning
• Process monitoring

Some ABB S800 modules also support HART functionality and advanced diagnostics.

ABB PLC Modules for Mining & Heavy Industry

South Africa’s mining and industrial sectors rely heavily on PLC and distributed control systems.

Nkokhi Group can assist with ABB automation components for:

• Mining
• Mineral processing
• Crushing plants
• Screening plants
• Conveyors
• Water treatment plants
• Pump stations
• Cement plants
• Manufacturing
• Food processing
• Chemical processing
• Power generation
• Energy systems
• Industrial machinery
• Material handling
• Bulk handling systems

We can assist with sourcing replacement PLC modules where equipment downtime requires a fast replacement solution.

ABB PLC Spare Parts

Nkokhi Group supplies and sources ABB PLC spare parts in South Africa for maintenance and breakdown requirements.

Available categories may include:

Controllers

• PLC CPUs
• Processor units
• Redundant controllers
• High-integrity controllers

I/O

• Digital input
• Digital output
• Analogue input
• Analogue output
• Mixed I/O
• Safety I/O

Communications

• Ethernet
• PROFIBUS
• PROFINET
• Modbus
• EtherNet/IP
• IEC 61850
• DeviceNet
• Foundation Fieldbus

Power & Interfaces

• Power supply modules
• Bus modules
• Interface modules
• Terminal units
• Module termination units
• CEX modules
• Accessories

ABB PLC Module Manufacturers

ABB

ABB is the principal manufacturer associated with the ABB PLC, AC 500, AC 800M, S500, S800 and Select I/O product families covered on this page.

Nkokhi Group focuses on supplying genuine and compatible replacement automation hardware based on the exact requirements supplied by the customer.

For critical applications, customers should confirm the required ABB part number, revision, firmware and system compatibility before placing an order.

Why Buy ABB PLC Modules from Nkokhi Group?

Nkokhi Group provides sourcing support for industrial automation equipment and electrical control components.

Our advantages include:

• ABB PLC module sourcing
• South African supply support
• New and surplus equipment sourcing
• Used and refurbished options where available
• Obsolete PLC sourcing
• Replacement module sourcing
• Part-number verification
• Technical specification checks
• Local quotation support
• Import sourcing when required
• Assistance with difficult-to-find automation components

Parts-on-demand: Send us the part number and required quantity and we can check availability and sourcing options.

How to Order ABB PLC Modules

To obtain a quotation, send us:

1. ABB part number
2. Model number
3. Description
4. Required quantity
5. Photograph of the existing module, if available
6. PLC/controller model
7. Application or machine information, where relevant

For example:

ABB Part Number: CI854B
Description: PROFIBUS DP-V1 Communication Interface
Quantity: 1
Condition Required: New / Used / Refurbished
Application: AC 800M

This information helps us identify the correct product and reduce the risk of supplying an incompatible module.

Tips for Buying ABB PLC Modules

1. Always provide the complete part number

ABB modules can have similar-looking model numbers. The complete ordering code is important.

2. Check the PLC family

Confirm whether your system is based on:

• AC500
• AC 800M
• S500
• S800
• S800L
• Select I/O
• System 800xA
• Other ABB automation platforms

3. Check the hardware revision

Older ABB systems may require specific hardware revisions or firmware versions.

4. Check communication compatibility

Before replacing a communication module, verify the required protocol:

PROFIBUS, PROFINET, Ethernet, Modbus, EtherNet/IP, IEC 61850, Foundation Fieldbus, etc.

5. Confirm I/O type

Do not order an analogue input module when the application requires digital input or output.

6. Check voltage and signal specifications

Confirm:

• 24 VDC
• Digital input voltage
• Digital output rating
• 4–20 mA
• Voltage input
• RTD
• Thermocouple
• HART
• Isolation requirements

7. Consider refurbished equipment

For older systems, a tested used or refurbished ABB module can sometimes provide a practical replacement option, subject to availability and application requirements.

8. Keep a spare critical module

For production-critical PLC systems, maintaining strategic spare modules can reduce downtime during equipment failures.

ABB PLC Module Applications

ABB PLC and I/O modules can be used in applications including:

Mining Automation | Process Control | Factory Automation | Water Treatment | Pump Control | Conveyor Systems | Material Handling | Manufacturing | Power Plants | Chemical Plants | Cement Plants | Food & Beverage | Packaging Machinery | Industrial Equipment

Frequently Asked Questions

What ABB PLC modules does Nkokhi Group supply?

We source a broad range of ABB PLC and automation modules, including CPUs, processors, digital I/O, analogue I/O, communication modules, power supplies, interface modules, S500, S800, S800L, AC500, AC 800M and Select I/O components.

Do you supply ABB S800 I/O modules?

Yes. We can source ABB S800 I/O modules, communication interfaces, termination units and related components subject to availability.

Do you supply ABB AC 800M modules?

Yes. We can assist with sourcing AC 800M processor, communication, power supply and related modules.

Can you supply obsolete ABB PLC modules?

We can assist with sourcing older and obsolete ABB PLC modules through available new, surplus, used or refurbished channels.

Can you source ABB PLC modules that are not available locally?

Yes. Where local stock is unavailable, Nkokhi Group can investigate international sourcing options.

Do you sell ABB PLC CPUs?

Yes. ABB PLC CPU and processor modules can be sourced according to the required model and application.

Do you supply ABB communication modules?

Yes. Depending on the platform, we can source ABB communication interfaces for technologies such as PROFIBUS, PROFINET, Ethernet, Modbus and other supported industrial networks.

Can I send a photograph of my ABB PLC module?

Yes. A clear photograph showing the ABB logo, complete part number, model number and rating label is useful for identification.

How do I get an ABB PLC module quotation?

Send the part number, description and quantity to Nkokhi Group. For difficult-to-identify items, include photographs and the PLC system model.

Are ABB PLC modules available in South Africa?

Availability varies by model. Nkokhi Group can check local and international sourcing options for the required ABB PLC module.

Request an ABB PLC Module Quote

Looking for an ABB PLC module supplier in South Africa?

Nkokhi Group can assist with sourcing:

ABB PLC Modules | ABB AC500 | ABB AC 800M | ABB S500 | ABB S800 I/O | ABB S800L | ABB Select I/O | ABB System 800xA | ABB PLC CPUs | ABB Digital I/O | ABB Analogue I/O | ABB Communication Modules | ABB PLC Spare Parts

Send us your ABB part number today.

Nkokhi Group (PTY) Ltd
South Africa

Request a quotation for your ABB PLC module, I/O module, CPU, communication interface or industrial automation spare part.