Siemens 6FC5372-0AA30-0AA1 – NCU 720.3PN WITH PLC 317-3 PN/DP
Siemens 6FC5372-0AA30-0AA1 – NCU 720.3PN WITH PLC 317-3 PN/DP from the 840 range. Status: discontinued by the manufacturer, no longer available new since October 2017; successor 6FC5372-0AA30-0AB0. Van Haelen supplies it refurbished or new in sealed factory packaging, with a 24-month warranty.
Also written as: 6FC5 372-0AA30-0AA1, 6FC53720AA300AA1
The Siemens 6FC5372-0AA30-0AA1 is a frequency converter or servo drive from the SINUMERIK 840D sl/840Di sl range. Manufacturer type designation: NCU 720.3PN WITH PLC 317-3 PN/DP. Status: discontinued by the manufacturer, no longer available new since October 2017; successor according to the manufacturer: 6FC5372-0AA30-0AB0. Key data: weight 4.336 kg, HS code 85371091. When replacing, keep the parameter set of the old unit; it makes setting up the replacement quick. 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 | 6FC5372-0AA30-0AA1 |
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| Type designation | NCU 720.3PN WITH PLC 317-3 PN/DP |
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| Series | 840 |
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| Manufacturer status | discontinued by the manufacturer, no longer available new since October 2017 |
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| Predecessor | 6FC5372-0AA30-0AA0 |
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| Successor | 6FC5372-0AA30-0AB0 |
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| HS code | 85371091 |
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| Country of origin | DE |
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| Weight | 4,336 kg |
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| Dimensions | 5,10 x 40,60 x 27,90 cm |
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Documentation from the manufacturer
All products of the 840 series
Faults and fixes 6FC5372-0AA30-0AA1
Problems with 6FC5372-0AA30-0AA1: alarm 2100 or 2101, NCK battery
Alarm 2100 is the warning that the NCU buffer battery is nearly flat, 2101 the message that it is flat. Replace the battery with the control switched on, otherwise machine data, programs and the axis references are lost. Make a complete series start-up backup (NC, PLC, HMI) first.
6FC5372-0AA30-0AA1: operator panel dark, keys unresponsive or alarm 300xxx
A dark OP panel with the control running is usually the backlight or the panel's power supply; keys that do not respond are a worn membrane or a loose connection to the MCP/TCU. Alarms in the 300xxx range come from the drives (611D) and name the axis; look for those at the drive module, not at the panel.
What do I check when replacing a 6FC5372-0AA30-0AA1?
On SINUMERIK components the software version (NCK, HMI, MCP firmware) must match the machine; the version is shown in the diagnostics or on the rating plate. Restore the series start-up backup on a replacement NCU and check the licence (hardware-bound on 840D sl). Panels and MCPs with the same issue are interchangeable without further steps.
Fault not fixed: replace, exchange or repair the 6FC5372-0AA30-0AA1?
Replacing from stock is the fastest route when a machine is down. Van Haelen supplies the 6FC5372-0AA30-0AA1 refurbished (tested, with a test report per serial number) or new in factory packaging, 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
Is the 6FC5372-0AA30-0AA1 still available?
Not new from the manufacturer any more: the 6FC5372-0AA30-0AA1 was discontinued since October 2017. Van Haelen supplies it refurbished and tested.
What is the successor of the 6FC5372-0AA30-0AA1?
According to the manufacturer it is the 6FC5372-0AA30-0AB0. A successor does not always fit an existing installation without changes; replacing like for like is often the fastest route. If in doubt, ask us.
Does the 6FC5372-0AA30-0AA1 replace the 6FC5372-0AA30-0AA0?
Yes. According to the manufacturer the 6FC5372-0AA30-0AA1 is the successor of the 6FC5372-0AA30-0AA0. Before replacing, check that the project and the connections match the new version; if in doubt we also supply the 6FC5372-0AA30-0AA0 itself, refurbished or new, as long as it can be found.
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.
What should I check when replacing a 6FC5372-0AA30-0AA1?
Keep the parameter set of the old unit; it makes setting up the replacement quick. Also check power rating, supply voltage and any option boards.
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.