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PRODUCT DESCRIPTION
6ES7288-1ST40-0AA0 combines local I/O and pulse control
Siemens 6ES7288-1ST40-0AA0 is the SIMATIC S7-200 SMART CPU ST40 DC/DC/DC. It provides 24 digital inputs and 16 sourcing transistor outputs, with 24 KB of program memory and 16 KB of user data memory. Its 24 V DC supply operates over the documented 20.4 to 28.8 V DC range.
The V2.5 system manual documents three pulse outputs up to 100 kHz, six high-speed counters, Ethernet and RS485 communications. PROFINET functions depend on the installed firmware and project configuration. Siemens lists the AA0 article as a cancelled spare part with an AA1 successor; verify the required hardware and software before approving a replacement.
The V2.5 system manual documents three pulse outputs up to 100 kHz, six high-speed counters, Ethernet and RS485 communications. PROFINET functions depend on the installed firmware and project configuration. Siemens lists the AA0 article as a cancelled spare part with an AA1 successor; verify the required hardware and software before approving a replacement.
BEFORE YOU BUY
Identify the installed AA0 controller
ACTUAL APPLICATIONS
6ES7288-1ST40-0AA0 connects distributed signals and motion tasks
Siemens demonstrates this exact AA0 CPU with ET 200SP and S7-1200 communication partners. Its system manual also documents open-loop pulse motion. Each task requires its own wiring, firmware and commissioned project.
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01 - REMOTE IO
Exchange signals with ET 200SP
The Siemens example uses a V2.5 ST40 and an IM 155-6 PN ST to read distributed inputs and write distributed outputs. Configure the GSDML, device name, IP address and process-image mapping before testing the remote station. -
02 - PLC DATA EXCHANGE
Transfer process data to an S7-1200
The documented ST40 example sends and reads 20-byte data blocks with an S7-1200 partner. Match the actual V-memory and partner data-block areas, connection permissions and software configuration before using the exchanged values in control logic. -
03 - PULSE MOTION
Command a stepper or servo axis
The system manual describes open-loop speed and position control using pulse outputs. Select a compatible pulse-input drive, configure the motion task and engineer direction, limit and protective functions. The pulse output alone is not a complete safeguarded axis.
Technical specifications for 6ES7288-1ST40-0AA0
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Product Model6ES7288-1ST40-0AA0
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Product ParametersStandard Transistor Output CPU
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ManufacturerSiemens
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CPU supply voltage24 V DC nominal; 20.4 to 28.8 V DC
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Integrated digital inputs24 sinking or sourcing inputs
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Integrated digital outputs16 sourcing MOSFET outputs
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Program memory24 KB
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User data memory16 KB
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Retentive memory10 KB maximum
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Local expansion capacity6 expansion modules and 1 signal board maximum
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High-speed counters6 total; single phase: 4 at 200 kHz and 2 at 30 kHz
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Pulse output channels3 at up to 100 kHz
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Communication interfaces1 Ethernet/PROFINET port and 1 RS485 port
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PROFINET IO device capacity8 devices maximum with supported controller firmware
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Output current limits0.5 A per point; 6 A per common
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Sensor supply capacity300 mA maximum at 20.4 to 28.8 V DC
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Maximum power dissipation18 W
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Module dimensions125 x 100 x 81 mm (W x H x D)
View all additional
Alternative Names
6ES7288-1ST40-0AA0
Siemens CPU ST40 DC/DC/DC
SIMATIC SMART ST40 AA0
SYSTEM & REPLACEMENT CHECK
Information needed before ordering
Three direct checks to secure your system integration and minimize ordering risks.
Information
System integration
Replacement check
Manuals & support
ST40 AA0 SYSTEM INTEGRATION
Validate firmware and assigned resources
Use the saved STEP 7-Micro/WIN SMART project for the installed AA0 controller. Confirm 24 V DC wiring, local I/O allocation and the exact module sequence before commissioning.
Assess expansion demand against six modules and one signal board, the available power budget and configured addresses. Keep high-speed counter and pulse assignments consistent with the physical terminals.
The documented PROFINET controller and I-device roles require compatible firmware. Check device names, addresses and each communication partner rather than assuming every Ethernet function is available.
Features:
- Installed firmware recorded
- Pulse and counter assignments checked
- Network role matched to the project
The Siemens 6ES7288-1ST40-0AA0 requires firmware, terminal assignments and the saved project to be verified before system integration and commissioning.
INTERCHANGEABILITY
Verify the complete replacement identity before commissioning
Siemens identifies this AA0 article as a cancelled spare part and lists 6ES7288-1ST40-0AA1 as its successor. Review the required hardware and software before approving either an exact spare or a successor substitution.
Preserve the installed program, system-block settings, terminal identification and connected-module order. Isolate power to the CPU and related equipment before removal or rewiring.
Validate the inputs, transistor output loading, pulse functions and communication tasks under controlled conditions before returning the equipment to service.
Features:
- Confirm the complete AA0 article
- Retain the installed project and settings
- Test all assigned controller functions
The Siemens 6ES7288-1ST40-0AA0 controller replacement requires replacement verification of firmware, saved logic and connected devices before release.
DOCUMENTATION STATUS
Browse the Manuals, Datasheets, Official Documents, Links
Important Notice: These references use the Siemens V2.5 system manual that explicitly lists 6ES7288-1ST40-0AA0. Shared specification tables contain other CPU columns; only ST40 values apply. Later firmware and the AA1 successor require their own compatibility review.Features:
- Available Siemens document references are confirmed before order
- Use the ST40 column and the exact ST40 pin map
- Accessories are supplied only when listed in the quotation
Documentation for the Siemens 6ES7288-1ST40-0AA0 requires the AA0 article and actual installed firmware to be matched; confirm manual availability in the written quotation.
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Important notice
Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
BUYER INFORMATION
Commercial terms without hidden steps
Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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01
Shipping & delivery
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DispatchEligible stock: same / next day
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CarriersDHL, FedEx or UPS
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Ship fromXiamen, China
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Packed size15.7 × 13.4 × 11.3 cm
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Shipping weightApprox. 0.41 kg
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Payment & customs
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PaymentBank transfer (T/T)
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CurrenciesUSD · EUR · GBP · RMB
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Credit cardsNot accepted
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HS reference85371091
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OriginChina
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Warranty & returns
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Warranty12 months from AMIKON
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InspectionLabel, condition and packing checks
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ReturnsPrior RMA authorisation required
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CompatibilityConfirm before order
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OEM warrantyDoes not apply
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Part checked
Full suffix recorded -
Condition checked
Label and appearance -
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Tracking supplied
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Sandy Lin
Dedicated account manager · 15+ years
FREQUENTLY ASKED QUESTIONS
Questions buyers ask about 6ES7288-1ST40-0AA0
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
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Does the listed AA1 successor authorize an immediate substitution for this AA0 article?
No. Siemens identifies 6ES7288-1ST40-0AA1 as the successor, but that listing does not validate an installed project. Check hardware features, installed firmware, project software and connected equipment before accepting a change of article. -
Do PROFINET controller and I-device functions require the same minimum firmware?
No. Siemens documents controller support for standard CPUs from V2.4, while the V2.5 system manual introduces I-device functionality. Read the actual CPU firmware and use the corresponding supported engineering configuration. -
Are all six high-speed counters rated for 200 kHz?
No. The single-phase specification is four counters at 200 kHz and two at 30 kHz. Two-phase counting has different limits. Choose a supported input assignment and counting mode instead of applying the highest rate to every channel. -
Can every output be loaded to its point rating without checking the common?
No. The 0.5 A point limit and 6 A common limit both apply. Calculate the simultaneous load on each wired group and provide suitable external protection; the manual specifies no output overload protection. -
Why must the first four digital inputs be checked separately for logic thresholds?
The ST40 table distinguishes I0.0 through I0.3 from the other inputs. Their minimum logic-1 requirement is 4 V at 8 mA, whereas the remaining inputs specify 15 V at 2.5 mA. Match the sensor and selected input to the applicable table. -
Is the X13 sensor supply the same connection as the CPU incoming supply?
No. The exact ST40 pin map places incoming L+ and M on X11 pins18 and19, while the sensor supply is on X13 pins10 and11. Identify the connector and terminal number before connecting power. -
How long does the real-time clock retain time without power?
The V2.5 manual states seven days typically and six days minimum at 25 degrees C. This is not indefinite retention. Include clock verification in the restart procedure after extended storage or shutdown. -
Can an IRT or MRP requirement be met merely by using the Ethernet port?
No. The exact ST40 communication table lists neither isochronous real-time communication nor media redundancy support. Validate the network architecture against the documented capabilities instead of treating all PROFINET features as interchangeable.
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