Siemens SIMATIC IPC Industrial PCs and Panel PCs, New Zealand

Siemens / SIMATIC IPC

Two SIMATIC IPCs with the same model name can be different machines. The model tells you the format; the article number carries the processor, memory, drive, operating system and expansion fit. On this range the article number is the specification.

SIMATIC IPC is the Siemens industrial PC family: box PCs, panel PCs and rack PCs running SCADA, WinCC, batch systems and software controllers. Common on New Zealand process plant, packhouses and any site with an operator station that is not a Comfort Panel.

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Two article number prefixes, and the age tells you which

Check this first, because it decides which generation you are looking at.

Prefix	Covers
6AV7	Legacy industrial PCs and panel PCs. Panel PC 477, 577, 677, 877, Flat Panel monitors and the earlier box PCs
6AG4	Current SIMATIC IPC numbering. The IPC227, 427, 477, 627, 677, 827 and 847 families in their later generations

A machine can carry a 6AV7 number and a model name that also exists under 6AG4. The two are not the same hardware, and driver and image support does not carry across.

So send the prefix as well as the digits. On a discontinued unit, 6AV7 is the more likely of the two.

Reading the model number

Unusually readable once you know the two rules.

Position	Meaning
First digit	The class. Larger means more capable and physically bigger
Last digit	7 means it has a display. Lower means a box with no screen
Trailing letter	The generation. C, D, E, G and so on

Box PC	Matching panel PC	Class
IPC227	IPC277	Nanobox and Nanopanel, fanless, small
IPC427	IPC477	Microbox and panel, fanless, DIN or wall
IPC627	IPC677	Box and panel, expansion slots
IPC827		Box, more slots
IPC547, IPC847		19 inch rack mount
IPC3000 SMART		Rack, cost-focused range

So an IPC477E is a panel PC and an IPC427E is the same class of machine without a screen. The pairing is deliberate, and it means a failed panel PC can sometimes be replaced by a box PC plus a separate monitor if the panel cutout is being changed anyway.

The generation letter is not cosmetic

An IPC477D and an IPC477E are different machines. Different processor generation, different chipset, different drivers, and in several cases a different mounting cutout.

So a like-for-like panel replacement needs the letter to match, or the panel needs modifying. Check the cutout before assuming a newer generation drops in.

The article number is the specification

The most important thing on this page, and the reason IPC quotes go wrong.

SIMATIC IPCs are configured to order. The article number encodes the processor, the memory fitted, the drive type and capacity, the operating system, the expansion cards and the interfaces.

What varies within one model name
Processor, from entry Celeron and Atom classes up to Core and Xeon
Memory, and whether it is ECC
Drive type. CFast, SSD, HDD, and RAID pairs
Operating system. Windows Embedded, Windows IoT, Windows Server, Linux, or none
Fieldbus interface. PROFIBUS or PROFINET, where fitted
Display size and touch type, on panel versions
Expansion slots and cards

None of that is visible in the model name. Two machines both labelled IPC627D can differ by a factor of several in capability and price.

So send the full article number, and if it is unreadable, send a photo of the rating plate. Quoting from the model name alone produces the wrong machine.

Display and touch on the panel versions

Variable	Options
Size	Typically 12, 15, 19 and 22 inch, by generation
Touch technology	Resistive or capacitive
Format	4:3 on older units, widescreen on newer
Front	Standard, stainless steel, or PRO all-round IP65

Two traps in that table

Resistive and capacitive are not interchangeable in a gloved environment. Resistive works with any glove and a stylus; capacitive needs a conductive touch or a compatible glove. A meat works or coolstore that specified resistive did so for a reason.

And 4:3 to widescreen changes the panel cutout. Replacing an older 15 inch 4:3 unit with a current widescreen one is fabrication work, not a swap. Worth establishing before quoting.

The PRO variants

PRO models are IP65 on all sides and mount on a support arm or pedestal rather than in a cabinet door.

They carry a different mechanical interface and are not a substitute for a cabinet-mount panel or the reverse. If the existing unit is hanging on an arm, it is a PRO.

Flat Panel monitors are a separate thing

Worth knowing when a display fails and the PC is elsewhere.

Siemens also sold display-only Flat Panel and Industrial Flat Panel units, driven remotely from a box PC over a dedicated link or standard video.

So a dead screen does not always mean a dead computer. If there is a box PC in the cabinet and a display in the door, they are two separate part numbers and either can be replaced on its own.

Where the application lives

The question that decides whether a replacement is a swap or a project.

Item	On a replacement IPC
Operating system	Supplied, but pre-installed for that hardware
SCADA or WinCC application	Not included. Restore from backup or reinstall
Software licences	Usually tied to the machine or a licence key
Historical data	On the drive. Recoverable if the drive survived

The drive is often the part worth recovering rather than the PC. If an IPC has failed but the SSD is intact, the application and the data are intact with it, and on several models the drive moves into the replacement.

Tell us whether the drive survived and we will say whether it is transferable to the unit we are quoting.

WinCC and licence keys

Siemens software licences are held as licence keys, historically on a USB dongle or a licence key storage location. Losing the machine does not automatically lose the licence, but losing the dongle can.

If a plant is decommissioning an IPC, the dongle and the recovery media are worth more than the chassis. Keep them.

Software controllers change the stakes

Worth checking before treating an IPC as an office PC in a cabinet.

Some SIMATIC IPCs run a software PLC, where the control logic executes on the industrial PC rather than in a separate S7 CPU.

Two consequences:

An IPC failure on such a machine stops the process, not just the display. It is a controller, and it should be spared like one.

And the fieldbus interface matters. A software controller reaching distributed I/O needs the right PROFINET or PROFIBUS interface, which on many units is a factory-fitted card rather than something added later.

Send the full article number so we can confirm what interface is in the unit.

Drives, and the CFast question

Drive type	Found on	Notes
CFast card	Fanless units, IPC227 and IPC427 classes	Removable. Often the whole system image
SSD	Most current units	Industrial grade, not a consumer part
HDD	Older box and rack units	A wear part. Assume it is near end of life
RAID pair	Rack and higher box classes	Mirrored. A single failed drive is replaceable

On the CFast machines the card is the computer, in the sense that matters. Move it and the application moves with it, in the same way a Beckhoff CX carries its system on a CFast card.

On a RAID unit, a drive alarm is not a reason to replace the PC. Replace the drive and let it rebuild. That is what the RAID was fitted for, and it is frequently misread as a machine failure.

The parts that wear out

Industrial PCs fail in predictable places, and most of them are cheaper than the machine.

Part	Symptom
Fan	Noise, then thermal shutdown. A consumable on fanned units
Dust filter	Overheating in a dirty environment. Cleanable
Hard drive	Slow boot, then failure
Backup battery	Clock resets, BIOS settings lost on power down
Backlight	Dim display on older panel units
Touch screen	Dead zones or drifting calibration
Power supply	Random restarts under load

A clock that resets every shutdown is a coin cell, not a dying PC. That one alone accounts for a fair number of unnecessary replacement quotes.

We supply fans, filters, drives, batteries and touch front assemblies as separate parts where they exist.

IPC against Comfort Panel

Worth being clear about, because the two get conflated.

	SIMATIC IPC panel PC	SIMATIC Comfort Panel
Runs	Windows, and any application on it	WinCC Runtime, embedded
Article prefix	6AG4, or 6AV7 on older units	6AV2
Replacement	Restore the image or reinstall	Transfer the project from the engineering tool
Suited to	SCADA, reporting, batch, software control	Machine-level operator interface

If the label starts 6AV2 it is a panel, not an IPC. Our Siemens HMI page covers those.

Before ordering a replacement

Symptom	Check first
Clock and BIOS settings reset each power down	The backup battery
Thermal shutdown	The fan and the dust filter
Drive alarm on a rack unit	Whether it is a RAID. Replace the drive, not the PC
Touch drifting or dead zones	Calibration, then the touch front assembly
Display dim but working	Backlight on older panels
Display dead, PC still running	Whether it is a separate Flat Panel, which replaces on its own
Random restarts	The power supply, and the 24 V feed quality
Will not boot after a drive swap	Whether the image was licensed to the original hardware

What to send us

The full article number, 6AG4 or 6AV7. On this range it is the specification, not a model code.

A photo of the rating plate, if the number is worn.

The panel cutout dimensions, for a panel PC, since generations change them.

Whether the drive survived, and whether you have a backup image.

Whether it runs a software controller or a fieldbus card.

Whether you need the whole machine or just a fan, filter, drive, battery or touch front.

What we can supply

Current production. The current SIMATIC IPC box, panel and rack families, configured to your specification. Quoted with a delivered lead time.

Discontinued. IPC227, IPC277, IPC427, IPC477, IPC627, IPC677, IPC827, IPC547 and IPC847 across the C, D and E generations, plus the 6AV7 Panel PC 477, 577, 677 and 877 range and Flat Panel monitors. Surplus and tested used, which is frequently the only way to keep an old SCADA image and its licences running unchanged.

Spare parts. Fans, dust filters, drives, CFast cards, backup batteries, touch front assemblies and power supplies where they are available separately.

Whole operator stations. Send the application and we will quote the PC, the display and the mounting as a set.

Why used matters on this range

Worth stating plainly, because it is the argument for holding an old machine.

An older SCADA or batch image is often tied to the hardware generation it was commissioned on. Drivers, licences and validated configurations do not always move forward.

So an identical used IPC keeps the system exactly as it is, where a current machine turns a failure into a migration project. On a validated or audited plant that difference is substantial.

Supply of the discontinued generations thins out and does not improve. If a machine has years left in it, the spare is worth buying while it exists.

We buy SIMATIC IPC

SIMATIC IPCs hold value well, particularly the discontinued generations, because they are the only way to keep an older image running.

If you are decommissioning, keep the drive, the recovery media, any licence dongle and the mounting hardware with the machine. A complete unit is worth considerably more than a bare chassis. See Sell To Us.

Common questions

Can you get a part that is not listed on your site?
Usually. The site shows what we hold, not what we can source.

Two units say IPC477D. Are they the same?
Not necessarily. The article number carries the processor, memory, drive and operating system. Send that.

Mine starts 6AV7 rather than 6AG4. Is that still an IPC?
Yes. 6AV7 is the older numbering for industrial and panel PCs. It usually means a discontinued unit, which is the side of the market we work in.

Will a current panel PC fit my existing cutout?
Often not. Generations change the cutout, and 4:3 to widescreen certainly does. Send the dimensions.

Can I move my drive into the replacement?
Sometimes. It depends on the model and how the operating system was licensed. Tell us both units and we will say.

Do you supply used equipment?
Yes, where new is not available, tested and clearly described.

What is the lead time?
Ex stock items ship the next working day within New Zealand. Configured-to-order units carry a build lead time, which we give you with the quote.

Do you quote in NZD?
Yes, in NZD including GST for New Zealand customers.

Send us your part numbers

The article number is the whole specification on this range, whether it starts 6AG4 or 6AV7. If it is unreadable, a photo of the rating plate does the same job. Quotes in NZD including GST.

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Industech is an independent supplier of new, surplus and used industrial automation equipment. We are not an authorised distributor of, approved by, sanctioned by, or affiliated with Siemens. Siemens, SIMATIC, WinCC, PROFINET and PROFIBUS are trademarks of Siemens AG. Windows is a trademark of Microsoft Corporation. All trademarks, brand names and part numbers are the property of their respective owners and are used here for identification purposes only.