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- 6ES7288-1SR40-0AA1
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PRODUCT DESCRIPTION
Standard SR40 architecture with relay-based local control
For forty-point relay control, Siemens 6ES7288-1SR40-0AA1 supplies 24 digital inputs, 16 relay outputs and 24 KB of program memory. This AC-powered CPU SR40 supports standard SMART expansion; its V2.8 variable-memory specification is 20 KB, so data capacity must be matched to the installed firmware.
The controller separates its program resources, network communication and relay-load capacity within one expandable station. Ethernet and RS485 interfaces support configured communications, while optional modules and a signal board extend the available resources. Firmware and power-budget checks remain essential when defining the station.
The controller separates its program resources, network communication and relay-load capacity within one expandable station. Ethernet and RS485 interfaces support configured communications, while optional modules and a signal board extend the available resources. Firmware and power-budget checks remain essential when defining the station.
BEFORE YOU BUY
Confirm the complete installed configuration
ACTUAL APPLICATIONS
Industrial Production and Service Sectors
These industry examples describe Siemens' broader market coverage, not verified installations of this exact product. Product suitability depends on the documented configuration and engineering requirements.
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01 · FOOD & BEVERAGE
Bakery, Confectionery and Sugar Manufacturing
Bakery and confectionery manufacturing across diverse consumer food categories.Sugar manufacturing and processing within the commercial food industry. -
02 · PLASTICS PROCESSING
Extruded and Thermoformed Plastics
Plastic extrusion for material production within the plastics industry.Thermoforming as a manufacturing route for shaped plastic products. -
03 · METAL FORMING
Sheet Metal and Wire Processing
Sheet metal processing within the broader metal forming industry.Wire processing for metal products across industrial manufacturing sectors.
Technical specifications for 6ES7288-1SR40-0AA1
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Product Model6ES7288-1SR40-0AA1
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Spare Model6ES7288-1SR40-0AA0
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Product ParametersCPU SR40 Relay Controller
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In stock1 unit
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ManufacturerSiemens
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AC supply range85 to 264 V AC, 47 to 63 Hz
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Onboard digital inputs24, nominal 24 V DC
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Onboard digital outputs16
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Output technologyRelay, dry contact
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Program memory24 KB
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Ethernet interface1, 10/100 Mbit/s
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Serial interface1 x RS485
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Expansion modules6 maximum
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Signal-board expansion1 maximum
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Sensor-power output24 V DC, 300 mA maximum
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Output current per point2 A maximum; observe common-group and load-type limits
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Memory cardOptional microSDHC card
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Expansion-bus supply5 V DC, 1400 mA maximum
View all additional
Alternative Names
6ES7 288-1SR40-0AA1
SIMATIC S7-200 SMART CPU SR40
Siemens CPU SR40 AC/DC/Relay
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
S7-200 SMART ARCHITECTURE
Standard SR40 architecture with relay-based local control
This SR40 combines local relay switching with standard expansion facilities. Up to six expansion modules and one signal board can supplement its twenty-four inputs and sixteen outputs, subject to the configured module arrangement and documented power limits. The CPU provides a 24 KB program area.
The V2.8 manual separates the Ethernet interface from the RS485 serial port and documents both PROFINET controller and I-Device roles. Network addressing, partner configuration and firmware remain part of the project definition, rather than properties established by a connected cable alone.
The relay output table specifies contact load ratings and common-group limits, while the CPU feature table identifies its program and memory resources. These separate boundaries matter when combining local switching, communication and additional analog or digital modules in one project.
Features:
- 24/16 onboard digital I/O
- Ethernet plus serial access
- Expandable standard CPU
The Siemens 6ES7288-1SR40-0AA1 requires the documented hardware configuration, installation conditions and interface arrangement to be verified before system integration and commissioning.
INTERCHANGEABILITY
Verify the complete replacement identity before commissioning
Match the 0AA1 hardware and installed firmware to the engineering project. Siemens documents additional variable and retentive memory for V2.8, but also states that a V2.8 CPU cannot be downgraded to V2.7 or earlier. Confirm the required software environment before selecting a spare, rather than comparing only the SR40 name.
Review the saved project together with its six-module expansion limit and single signal-board position. Preserve Ethernet settings, RS485 configuration and the installed module sequence so that equal onboard channel counts do not conceal a different station configuration. The CPU also permits an optional microSDHC memory card.
Check the AC supply and relay-contact wiring as distinct circuits. The transistor-output ST40 is not electrically equivalent, and the economy CR40s lacks the same expansion and Ethernet facilities; proposed substitutions require a documented project comparison. The manual explicitly separates standard and economy CPU columns.
Features:
- Complete suffix verification
- Project and firmware comparison
- Electrical configuration review
The Siemens 6ES7288-1SR40-0AA1 requires replacement verification based on its complete order number, installed hardware, signal configuration and project documentation.
DOCUMENTATION STATUS
Browse the Manuals, Datasheets, Official Documents, Links
Important Notice: Official documents are provided through manufacturer links. Accessories, manuals, cables, calibration data, software, certificates, and other items are not included with this equipment unless listed in the stock item description.
Features:
- Exact-model manufacturer data and relevant original manual pages
- Verified manufacturer product reference; separate installation document not supplied
- Accessories and supplied documentation follow the written quotation
Documentation for the Siemens 6ES7288-1SR40-0AA1 includes an independent technical summary and selected original manufacturer pages; check the applicable document edition against the delivered product and approved installation documentation.
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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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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 sizeConfirm final packed dimensions
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Shipping weightConfirm final packed weight
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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 reference8537101190
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OriginConfirm supplied-unit origin
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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
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Condition checked
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Tracking supplied
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Sandy Lin
Dedicated account manager · 15+ years
FREQUENTLY ASKED QUESTIONS
Questions buyers ask about 6ES7288-1SR40-0AA1
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
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What is the output-stage difference between SR40 and ST40?
This SR40 uses sixteen dry-contact relay outputs and an AC CPU supply. ST40 uses sourcing transistor outputs and a DC supply; matching the forty-point designation does not preserve the electrical arrangement. -
Does this SR40 have both Ethernet and serial communication?
Yes. It has one Ethernet interface and one RS485 port. A supported optional communication signal board is a separate configured item, not a second built-in port. -
Can the 0AA1 CPU replace a CR40s solely because the dimensions match?
Equal dimensions do not establish interchangeability. The SR40 supports expansion, Ethernet and standard memory resources that differ from the fixed, serial-only CR40s; the project and wiring need comparison. -
Why should user-data capacity be checked with the firmware version?
Siemens documents a 4 KB increase in standard SR/ST variable memory with V2.8, separately from program memory. Verify actual firmware and project needs rather than using an unexplained combined-memory figure. -
Is output overload protection integrated into the relay channels?
The output table lists no overload protection. Review the installation's protection design and observe the per-point, common-group and load-type limits for the relay circuits. -
Is a V2.8 spare downgrade-compatible with older firmware projects?
The V2.8 release notes state that those CPUs cannot be downgraded to V2.7 or earlier. Confirm the engineering software and project compatibility before choosing that firmware configuration.
READY TO VERIFY YOUR PART?
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