6ES7511-1AK02-0AB0

Product information

The 6ES7511-1AK02-0AB0 is a Siemens SIMATIC S7-1500 central processing unit designated CPU 1511-1 PN. It combines 150 KB of program work memory with 1 MB of data work memory, a PROFINET IRT interface with an integrated two-port switch, and 60 ns bit-operation performance. A SIMATIC memory card is required for operation — this CPU has no integral program storage.

The 1511-1 PN is the entry point to the S7-1500 platform, which makes it a common specification on machines engineered for S7-1500 but not needing the memory or performance of a larger CPU. Its PROFINET IRT interface supports isochronous operation, with a minimum OB 6x cycle of 625 µs distributed and 1 ms central.

Technical specifications

Manufacturer / family	Siemens · SIMATIC S7-1500
Product type	CPU 1511-1 PN
Hardware functional status	FS03
Firmware version	V2.9
Engineering software	STEP 7 TIA Portal from V17 (FW V2.9) / V15 (FW V2.5) or higher; older versions address this hardware as 6ES7511-1AK01-0AB0
Work memory — program	150 KB
Work memory — data	1 MB
Interface 1	PROFINET IRT with 2-port switch
Isochronous mode	Yes — distributed and central
CPU processing time, bit operations	60 ns typical
Supply voltage	24 V DC (permissible 19.2–28.8 V DC)
Current consumption	0.7 A rated · 0.95 A maximum
Power infeed to backplane bus	10 W
Power loss	5.7 W typical
Memory card	SIMATIC memory card required — 1 slot
Mains buffering	5 ms stored energy time, repeat rate min. 1/s
Display	Integrated, 3.45 cm screen diagonal, 8 keys

Specifications as published in Siemens product data for this article number. Verify against the nameplate of the unit offered to you — hardware functional status and firmware can differ between production runs.

Lifecycle status

Siemens product data marks this article number as a spare part rather than an actively produced item: delivery release 2018-03-29, phase-out announced 2024-05-01, product cancellation 2025-04-01. For installations built around the CPU 1511-1 PN, that means replacement units may become difficult to obtain through normal new-stock channels, and sourcing shifts to surplus and secondary-market supply.

Send a photograph of the nameplate with your required quantity. Units of this type can differ in hardware functional status and firmware, so availability is confirmed against your specific requirement rather than against the ordering code alone.

Typical applications

• Machine-level control on S7-1500 platforms, including retrofit and spare-part replacement
• Motion control over PROFINET IRT where isochronous operation is required
• Line topology installations using the integrated two-port switch to daisy-chain devices
• Existing installations where the running program must execute on an identical CPU type

Application examples describe typical uses of this product type. Suitability for your own installation must be confirmed against your engineering documentation.

Related references

• 6ES7511-1AK01-0AB0 — earlier functional status of the same CPU 1511-1 PN; older TIA Portal versions address this hardware under that ordering code
• 6ES7505-0KA00-0AB0 — PS 25W 24 V DC system power supply for the S7-1500 backplane bus
• 6ES7155-6AU01-0BN0 — ET 200SP PROFINET interface module IM 155-6 PN ST

Before you order

To confirm a specific unit, please provide the complete ordering code, hardware functional status (FS), firmware version, a nameplate photograph, the quantity required and the delivery destination. Availability, condition, quantity, lead time and commercial terms are confirmed individually after inquiry.

Frequently asked questions

Is the 6ES7511-1AK02-0AB0 still manufactured?
Siemens lists it as a spare part rather than active production, with phase-out announced in May 2024 and cancellation in April 2025. Units are sourced through surplus channels.

Do I need a SIMATIC memory card?
Yes. This CPU requires a SIMATIC memory card for program and data storage and will not run without one.

Which TIA Portal version is required?
Siemens lists TIA Portal V17 or higher for firmware V2.9, and V15 or higher for firmware V2.5. Older versions address this hardware as the AK01 reference.

Can I supply the exact revision I have installed?
Send the nameplate photograph and the hardware functional status of the existing unit. Matching is done against what is actually available rather than assuming the ordering code is sufficient.

What is the difference to the AK01 version?
AK01 is an earlier functional status of the same CPU 1511-1 PN. Matching the complete ordering code and FS matters when the existing program and hardware configuration must remain valid.

What is the price and lead time?
Both depend on current availability for the specific revision and quantity, so they are quoted individually.