Siemens 6AG4131-3GD20-3AA2
Siemens 6AG4131-3GD20-3AA2 – Industrial PCs. Van Haelen supplies it refurbished, with a 24-month warranty.
Also written as: 6AG4 131-3GD20-3AA2, 6AG41313GD203AA2
The Siemens 6AG4131-3GD20-3AA2 is a operator panel or industrial PC. Back up the project before replacing the panel and check that the software version matches. Ask us about exchange, repair and a spare-parts pool for your installation.
Available as
Product data
| Manufacturer | Siemens |
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| Part number | 6AG4131-3GD20-3AA2 |
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| ETIM | EC001413 |
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Documentation from the manufacturer
All Industrial PCs
Faults and fixes 6AG4131-3GD20-3AA2
6AG4131-3GD20-3AA2 (IPC627E): which LED is lit and what does it mean?
The front carries four multi-colour LEDs. PC ON/WD: green is BIOS ready to boot, flashing green/yellow (1 Hz) is BIOS in POST with the power switch on, yellow is idle state, flashing red (1 Hz) means the watchdog is active. RUN/STOP (L1), ERROR (L2) and MAINT (L3) are controlled by your own program or a controller program (for example a soft PLC) and mean nothing without such a program. At the rear, next to the removable drives, sit the RAID LEDs HDD ALARM: both off is RAID OK, LED 1 red is HDD1 not OK, LED 2 red is HDD2 not OK, both red is RAID not OK, both flashing is synchronising. Ethernet: LED 1 off, green or orange for 10, 100 or 1000 Mbps, LED 2 lit with a connection and flashing with activity. Source: Siemens, SIMATIC IPC627E Operating Instructions (A5E44297201-AE), 1.4.2 and 1.4.3.
6AG4131-3GD20-3AA2 (IPC627E): RAID degraded or drive defective: how do I integrate a new drive?
A defective drive is reported by SIMATIC IPC DiagBase or DiagMonitor, by the HDD ALARM LEDs at the rear and by the RAID software: Intel Rapid Storage Technology (Start > Intel), Status tab. In the delivery state the system does not integrate a replaced drive by itself: in the Status menu click the RAID volume, then in the Manage menu 'Rebuild to another Disk', select the new drive and click 'Rebuild'; this works in the running system or after switching off. Prefer automatic: enable the 'Auto-rebuild on hot plug' option under 'Automatic Rebuild' in the Preferences menu. Note: an automatically integrated drive is erased without warning, all partitions and data on it are lost, so use a brand new drive. The synchronisation takes, as a guide value, less than 3 hours at 90% drive load, with extremely high load hours to days; the system may respond with a delay meanwhile, so do not operate safety-critical functions until the synchronisation is complete. Source: Siemens, SIMATIC IPC627E Operating Instructions (A5E44297201-AE), 5.3.1, 5.3.4 tot 5.3.6 en 7.2.
6AG4131-3GD20-3AA2 (IPC627E): temperature, fan, watchdog or battery alarm in DiagBase or DiagMonitor
SIMATIC IPC DiagBase (supplied with a Windows installation) or the optionally ordered DiagMonitor (via the network, from version 5.1.0) monitors the device. Temperature: sensors at critical points such as the processor, with high and low limits per sensor; when a limit is exceeded the software adjusts the speed of the device and power supply fans and a temperature alarm follows. Fans: underspeed, failure and a cable break of the tachometer line give a fan alarm. Watchdog: if it is not addressed within the configured time, an alarm follows and, as configured, a hardware reset, a restart or a shutdown. Battery: when the first warning threshold is reached, the CMOS backup battery runs for at least one more month. Drives: SMART status, also in RAID (Normal, OK, Degraded, Rebuild); when it goes to 'Not OK', back up your data and replace the drive. Preventive replacement according to Siemens: hard disk and fans 3 years, CMOS backup battery 5 years, SSD depending on the type of use. Permitted ambient temperature in operation: 0 to +55 °C (with a hard disk from +5 °C); above 45 °C the permissible total power for USB and PCI/PCIe expansions is lower (table in 8.5). Source: Siemens, SIMATIC IPC627E Operating Instructions (A5E44297201-AE), 5.4.1 tot 5.4.3, 7.2 en 8.5.
6AG4131-3GD20-3AA2 (IPC627E): wrong time and date, BIOS settings lost: the CMOS backup battery
Set date and time with F2 during the boot operation in the Main tab of the firmware. If they are still wrong afterwards, the backup battery is dead: replace it only with the same type, the lithium cell CR2450-N (Siemens article number A5E00047601). Note the firmware settings first, because they are deleted when the battery is changed, and disconnect the device fully from the mains. The battery compartment is at the rear, next to the removable drives: remove the screw, take out the battery holder, replace the battery and refit the holder with the screw. Then check the firmware settings. Siemens gives a replacement interval of 5 years, and DiagBase or DiagMonitor warns at the first threshold at least one month in advance. Source: Siemens, SIMATIC IPC627E Operating Instructions (A5E44297201-AE), B.2.1, 1.4.2, 7.2 en 7.3.3.
6AG4131-3GD20-3AA2 (IPC627E) does not boot: Windows does not start, 'Boot device not found' or after a BIOS update
If Windows no longer boots, Siemens says to check the 'SATA Configuration' submenu and the Boot menu in the firmware (BIOS). For 'Boot device not found': under 'Boot > Boot device' set the boot medium to 'Enabled' and to the top of the priority, and activate UEFI mode if the medium is set up with GPT. After a drive change the system does not boot from the RAID array if it does not have the highest boot priority, and the SATA port shows 'unused' if the removable tray is not fully pushed in: reboot with a functioning drive. If the device crashes during start-up after an expansion card was fitted, remove the card and restart; if a card is not detected, reseat it and clean the contact surfaces with pure ethanol. A firmware update deletes all BIOS settings: save them to a file first (Exit tab). If the device no longer starts after a failed update there is BIOS Recovery: a USB stick with the file 'EFI\UpdateCapsule\CapsuleUpdateFile1000.bin', the recovery jumper in position '3-4 BIOS Recovery', switch on, wait for the update to start, and afterwards the jumper back to '2-3'. Source: Siemens, SIMATIC IPC627E Operating Instructions (A5E44297201-AE), B.2.1, B.2.2 en B.2.4; Firmware/BIOS description SIMATIC IPC627E, IPC677E, IPC647E, IPC847E (A5E45911216-AC), 5 and 5.1.
What do I check when replacing a 6AG4131-3GD20-3AA2 (IPC627E)?
Siemens declared the IPC627E and the IPC677E phase-out products as of 1 October 2026 (product note 110007332 of 1 October 2026). For questions to Siemens and when choosing a replacement, have the article number (MLFB) from the rating plate, the BIOS or image version and the installed hardware and software at hand; the Windows licence is on the COA label on the device. Take the same order variant: 2 or 5 expansion slots, processor, memory, drives (RAID1 or not, SSD or hard disk) and the Windows version. Siemens assures spare parts for 5 years after the end of production. Source: Siemens, SIMATIC IPC627E Operating Instructions (A5E44297201-AE), 1.2, 3.1.3 en B.1; Siemens-productmelding 110007332.
Fault not fixed: replace, exchange or repair the 6AG4131-3GD20-3AA2?
Replacing from stock is the fastest route when a machine is down. Van Haelen supplies the 6AG4131-3GD20-3AA2 refurbished: tested to this family's test protocol, with a test report per serial number, with a 24-month warranty. The current lead time is shown with the condition on this page. Prefer an exchange: you get a refurbished unit straight away and return the faulty one within 14 days. Repairing your own unit is also possible: diagnosis, then a fixed price.
What information should I send for a quick diagnosis?
A photo of the rating plate (order number, product version, firmware), the exact fault code or LED state, when the fault occurs (at power-up, on enable, under load) and what you have already tried. For PLCs an export of the diagnostic buffer, for drives the parameter set. With that we can usually say the same day whether replacing, exchanging or repairing is best.
Frequently asked questions
What does refurbished mean?
Cleaned, inspected, aged or critical components replaced and tested to our test protocol for this product family. You get a 24-month warranty, a test report and a serial number label.
Can I exchange or repair my faulty unit?
Yes. With an exchange Van Haelen supplies a refurbished unit straight away and you return the faulty one. With a repair you first get a diagnosis and then a fixed price, with test report and warranty.