PLC and I/O module spares for plants that can't wait
CPUs, digital and analogue I/O, power supplies and communication cards for maintenance, expansions and upgrades. Send the order number from the module and we come back with availability, lead time and price.
Request a quote: PLCs & I/O modules
Tell us what you need. An engineer replies with availability, lead time and price.
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What we source
- PLC CPUs and memory cards
- Digital and analogue I/O modules
- Rack and panel power supplies
- Profinet, Profibus, Ethernet/IP and Modbus communication cards
- Backplanes, racks and terminal connectors
How we handle plcs & i/o modules requests
Match the exact order number
PLC modules with similar names are often not interchangeable. The full order number and hardware or firmware version on the module label is what lets us source the right one first time.
Discontinued modules
If the manufacturer has retired a module, we tell you whether it can still be sourced, or whether a supported replacement exists and what changing over involves.
Engineers on the other end
Requests are reviewed by people who understand the system, so you get a straight answer on compatibility rather than a catalogue lookup.
About plcs & i/o modules from Precision Spares
Programmable logic controllers form the backbone of industrial automation across South African plants, from food processing lines in the Western Cape to mining operations on the Witwatersrand. When a PLC module fails — whether it is a CPU, a digital input card or a power supply — the cost of downtime escalates rapidly, which is why having a reliable source for genuine spares is essential for any maintenance team. We work with Siemens, Delta, Schneider Electric and Allen-Bradley platforms to supply the exact module your system needs.
Sourcing the correct PLC spare requires more than matching a part number. Hardware and firmware revisions must align with your existing rack configuration, and communication modules need to speak the same protocol as your network. Our engineers review the full order number from your module label to confirm compatibility before you commit to a purchase. For discontinued platforms such as the Siemens S7-300, we maintain access to New Old Stock and can advise on like-for-like replacements or staged migration paths to current hardware.
In South Africa, lead times on imported automation components can stretch to several weeks, which makes local availability critical when a line is down. We hold common modules in stock for same-day or next-day courier dispatch to sites in Gauteng, KwaZulu-Natal, the Eastern Cape and beyond. For urgent breakdowns, send us the order number with the machine-down flag and we will respond with a confirmed availability lead time and a firm price — no guesswork, no delays while you wait for a call back.
Common questions
What do you need from me to quote a PLC module?
The full order number from the module label is best. A clear photo of the label also works. Add the quantity and whether the job is urgent.
Can you find modules that are no longer manufactured?
Often, yes. Send the part number and we will check availability and advise on alternatives if there is no like-for-like option.
Do I need to send the whole PLC to get a spare?
No. In most cases the module can be removed and sent, or we can ship a replacement for your team to install.
Can you match the hardware and firmware version?
Yes. The version details on the module label tell us which exact variant to source so it works with your existing rack and program.
What are the most common PLC spares you supply?
CPUs, digital and analogue I/O modules, power supplies and communication cards. If it mounts in a rack or panel, we can usually source it.
How do I find the order number on my module?
It is printed on the front or side label of the module, usually starting with the manufacturer prefix such as 6ES7 for Siemens. A close-up photo is enough.
Can you supply a replacement before the failed module is returned?
In many cases yes, depending on the part. Tell us the situation and we will confirm whether an advance replacement is possible.
What brands of PLC spares do you carry?
We mainly source Siemens, Delta, Schneider Electric and Allen-Bradley spares, along with other leading automation brands on request.
How quickly can I get a PLC module in South Africa?
If the part is in stock locally it can be couriarded the same or next day. Imported parts depend on availability, which we confirm with the quote.
Will a replacement module need to be programmed?
Some modules need firmware or hardware configuration matched to your system. Send us the details and we will advise before you order.
Ready to request a quote?
Send the part number or a photo of the nameplate for plcs & i/o modules. An engineer replies with availability, source, condition and lead time.
Request a quote: PLCs & I/O modules
Tell us what you need. An engineer replies with availability, lead time and price.
1/2
Need it urgently?
Call or WhatsApp the nameplate. Every day, 07:00 to 17:00. Part discontinued? How we source obsolete parts.