PLC training kit vs simulator: which to buy first

Somewhere in a cupboard in almost every industrial town in South Africa there's a PLC training kit that ran one demo program and never got switched on again. Somewhere else there's a technician who practised on a simulator for a year, started a job, and got caught flat the first time a sensor was wired backwards on a real terminal strip. Both stories are true, both are common, and both come from buying the wrong tool first. This page is the honest comparison: what R12 000 to R25 000 of bench hardware teaches that software never will, what a graded simulator teaches that a kit never will, and the order in which a self-funding SA learner should buy them.

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TL;DR

• A real PLC training kit (typically an S7-1200 or LOGO! starter kit with a power supply and a switch bank) lands in South Africa at roughly R12 000 to R25 000 once the panel extras are counted.
• The simulator route starts at R0 on the free tier and runs $12–$29 a month (about R220–R540) for the full curriculum.
• The kit teaches the physical trade: terminations, sensor polarity, supply faults, the cost of a mistake. The simulator teaches the logic trade: instructions, sequences, graded fault-finding, at twenty times the exercise volume.
• Our verdict, argued below: simulator first for almost everyone. Kit second, once you're employed or an employer is paying. Kit plus simulator is the real home-lab endgame.
• The expensive failure mode is the kit-first route: hardware arrives, the demo runs, and learning stalls because a kit ships with no syllabus and no grader.

Side-by-side

Criterion	Training kit	Simulator
Upfront cost	R12 000 – R25 000 landed	R0 free tier; $12/month Basic
What it teaches	Wiring, terminations, fault-finding on physical terminals	Logic, instructions, sequences, graded exercises
Feedback	None; the lamp lights or it doesn't	Automated grading with the failing scenario named
Exercise volume	One rig, the circuits you think up yourself	Full curriculum of graded exercises plus an open sandbox
Failure modes	Blown inputs, reversed polarity, a dead channel that costs real money	None that cost money — reset and go again
Resale	Decent — used starter kits hold value if undamaged	None; it's a subscription you can cancel
Portability	A bench, a power point, space at home	Any laptop with a browser, anywhere
Load-shedding dependence	Needs mains or an inverter on the bench	Runs on a laptop battery through an outage window
Brand specificity	You bought one vendor's hardware	Brand-neutral IEC 61131-3 practice

What a kit teaches that software can't

We sell the simulator, so this section is the one to read most carefully — it's where we argue against ourselves, and we mean every word of it.

A kit teaches your hands. Stripping a wire to the right length, seating a ferrule, torquing a terminal screw so it neither cuts strands nor works loose under vibration — these are motor skills, and no amount of clicking builds them. The first time you wire a three-wire PNP sensor and the input bit stays dead because you swapped brown and black, you learn sensor polarity in a way no diagram delivers. The simulator's wiring track teaches you the decision (sourcing versus sinking, where the load sits), but the kit teaches you the screwdriver.

A kit teaches consequences. Put 24 V where it doesn't belong and something real breaks. Reverse polarity into an input card and you may lose the channel; do it into the wrong device and you'll meet the small, specific smell of a burnt relay coil — a smell every working technician knows and no simulator will ever reproduce. That consequence is a feature, not a flaw. Care around live terminals is a professional reflex, and reflexes are built where carelessness costs something.

A kit teaches the unglamorous physical layer where real faults live: the 24 V supply that sags when one more device is daisy-chained onto it, the loose terminal that works on the bench and fails on the second day, the cable you wired correctly to the wrong terminal number. Plant fault-finding is disproportionately this layer, and a learner who has only ever seen clean simulated I/O will be slower at it.

And a kit is yours. No subscription, no connection needed, and if you keep it undamaged, a used S7-1200 starter kit resells for a respectable fraction of what you paid. As an asset, hardware beats software rental. As a first teacher, it has the problems the next section describes.

What a simulator teaches that a kit can't

The simulator's advantage is not that it imitates the kit more cheaply. It does a different job.

It grades you. A kit gives you a lamp: on or off. It will run a dangerously wrong program, a stop circuit that fails unsafe, say, exactly as cheerfully as a correct one, and nothing on the bench will ever tell you the difference. The simulator's curriculum runs each exercise against automated test scenarios and fails you with the specific scenario named: stop and start pressed in the same scan, a broken stop wire, an out-of-range analog value. Being failed for reasons is the fastest teacher in this trade, and hardware can't do it.

It injects faults on demand. On a kit, creating a realistic fault means physically sabotaging your own wiring, which gets old after the third time you re-strip the same wire. In the simulator, fault scenarios are part of the exercise: the sensor that sticks, the wire that breaks mid-sequence. You can practise diagnosis twenty times in an evening without touching a screwdriver.

It scales. A kit gives you one rig and whatever circuits you can dream up for it — and self-invented exercises stop at the edge of what you already know. The curriculum hands you a graded sequence designed to stretch you: the start-stop seal-in, jog versus latch, star-delta interlocks, counters, sequences, analog scaling, on through fault-finding projects. Twenty structured exercises versus one bench is not a small gap. It's the difference between practising and tinkering.

Mistakes are free. Reverse the polarity in the simulator and you learn the lesson without the R3 000 repair or the three-week wait for a replacement module from the distributor. For a beginner, which is exactly when polarity mistakes happen, this changes how boldly you experiment. Learners who are scared of breaking their expensive kit practise timidly. Timid practice is slow practice.

There's also the quiet matter of completeness. The simulator's full stack — sandbox, curriculum, wiring track, sensor school on the Pro tier — covers the decision-making half of the physical layer too: which sensor type, which wiring pattern, what the input should read. The kit then has far less to teach you, and what remains is the part it teaches best: your hands. The broader product detail lives on the simulator hub.

The verdict

Simulator first. Not as a compromise — as the correct order, and we'll argue it plainly.

In your first six months, the skill under construction is logic: reading rungs, writing rungs, predicting scan behaviour, finding the fault in a program. A kit contributes almost nothing to that skill that a good simulator doesn't, while costing fifty to a hundred times more and arriving with no syllabus, no grading and no next step. The standard kit story — demo program, one happy weekend, cupboard — isn't a character flaw in the buyers. It's what happens when hardware arrives before the knowledge of what to build with it.

Buy the kit later, in one of three situations. You're employed in the field and the kit keeps your hands current at home. An employer or a training budget is paying, in which case hardware plus the time to use it is a gift — take it. Or you've finished the bulk of a curriculum, you know exactly what the bench is for, and the missing piece in your skills is genuinely physical: terminations, sensor wiring, supply layout. At that point the kit stops being a cupboard ornament and becomes what it should have been all along — the second half of a home lab.

Because that's the real endgame for a serious self-taught learner: kit and simulator. The simulator carries volume, grading and new patterns; the bench carries the physical reflexes and the joy of a real contactor pulling in. R25 000 spent in that order, subscription first and hardware once you can use it, buys a home lab that actually gets used. The full at-home sequencing, week by week, is laid out in the learn PLC at home guide.

Common mistakes when buying

• Buying the kit as motivation. "If I spend R20k I'll have to practise" is a bet with bad odds. Sunk cost doesn't build study habits; small daily wins do, and those are cheaper.
• Buying more I/O than you can wire. A starter CPU with one DI and one DO module is months of learning. The expanded chassis with analog cards and an HMI looks impressive in the cupboard it ends up in.
• Ignoring the extras in the budget. The advertised kit price rarely includes the 24 V PSU, a switch-and-lamp bank, wire, ferrules, a crimper and a DIN rail to mount it all on. Those extras are why "R12k kit" becomes R18k landed on your bench.
• Buying second-hand without testing every channel. Used kits are good value, but a dead input channel on an undocumented rig will cost a beginner a weekend of confused fault-finding aimed at their own correct logic.
• Buying the kit brand before knowing your market. If the plants in your area run a different vendor than the kit you bought, your hardware-specific knowledge transfers only partly. Logic skills transfer fully — another argument for building those first.
• Letting the kit's lack of feedback set your standard. The lamp lighting is not the same as the logic being right. Learners who only ever self-assess against "it seems to work" plateau early and carry quiet bugs into their habits.

How to test this in the simulator

Run the experiment in the cheap direction first. Spend two or three weekends on the free tier — the open sandbox plus the first six graded lessons. Build the start-stop seal-in until it's reflexive, let the grader fail you a few times, and notice what that feedback loop does to your pace of learning. Then price the question honestly: would a R20 000 bench have taught you this faster, or would it have taught you something else entirely — and is that something else what you need now?

If the answer is that you need the logic first, you've just saved yourself the cupboard kit, and the Basic tier at $12 a month carries you through the curriculum for less than the cost of the kit's power supply. Current tiers are on the pricing page. The kit purchase will still be there in a year, and you'll buy it knowing exactly what it's for.

Two South African practicalities tip the same way. Kit prices ride the exchange rate, so the R20k bundle you're eyeing today may cost meaningfully more by the time you've saved for it, while a monthly subscription absorbs that drift in small increments. And a bench needs mains: when the schedule takes the power, the kit goes dark with it, while a charged laptop keeps a practice session alive through the window. Neither point decides the question alone. Both reward starting with the cheap, portable half.

Start the free tier →

Vendor reference

If you do go the hardware route, buy from the official channel and read the documentation first. Siemens publishes the S7-1200 starter kit documentation, manuals and application examples through support.industry.siemens.com — search "S7-1200 starter kit" for the current bundle contents and the getting-started guide, which is genuinely good. The LOGO! logic module is the cheaper Siemens entry point and shares the same portal. For brand-neutral background on what the controller in either kit actually does, Wikipedia's programmable logic controller article covers the architecture and history. Pricing for kits in SA moves with the exchange rate — the R12k–R25k range here is a 2025/2026 landed-cost ballpark, so get a current quote from a local distributor before budgeting.

What we don't claim

We are not SAQA-registered and not MerSETA-accredited, and completing our curriculum earns a completion record — plus the portfolio export on the Pro tier — not an NQF-listed qualification. We sell one side of this comparison, so read the verdict knowing that. We don't claim the simulator replaces hardware: terminations, live wiring and the physical fault-finding layer need a real bench eventually, and we've tried to give the kit its full due above. We don't claim our exercise count makes hardware time unnecessary either — volume builds the logic skill, and the bench builds a different one. And kit prices are estimates, not quotes: exchange rates and distributor margins move them, so verify before you spend.