Largest local I/O in this group
Twenty-four onboard inputs and sixteen relay outputs reduce the need for separate local expansion in applications that fit the SR40 terminal map.
Technical Summary
Controller profile6ES7288-1SR40-0AA1 is the CPU SR40 AC/DC/relay controller in the SIMATIC S7-200 SMART range. Its integrated signal set comprises twenty-four digital inputs and sixteen relay outputs, while the 40 KB combined program/data allocation supports a larger local application than the SR20 and SR30.
The CPU provides one Industrial Ethernet port, one RS485 port, PROFINET controller/device functions and web-server support. These functions still require project, firmware and network-security review before service.
Local inputs24 × 24 V DC
Local outputs16 × relay, 2 A
Memory40 KB program/data
Housing width125 mm
Specifications
Official product data| Manufacturer | Siemens |
|---|---|
| Product family | SIMATIC S7-200 SMART |
| Exact article number | 6ES7288-1SR40-0AA1 |
| CPU designation | CPU SR40 AC/DC/Relay |
| Supply range | 85–264 V AC, 47–63 Hz |
| Integrated digital inputs | 24 × 24 V DC |
| Integrated digital outputs | 16 × relay, 2 A |
| Program memory | 24 KB |
| User data memory | 16 KB |
| Optional memory card | microSDHC |
| Communication interfaces | 1 × Industrial Ethernet; 1 × RS485 |
| PROFINET IO devices | Up to 8 connectable devices |
| Web server | Supported |
| High-speed counters | 6 counters; 4 integrated inputs assigned for HSC functions |
|---|---|
| Pulse outputs | 3 |
| PID loops | Up to 8 |
| I/O address area | 144 bytes inputs; 144 bytes outputs |
| Real-time clock backup | 7 days; hardware clock without battery backup |
| Power loss, maximum | 23 W |
| Current consumption | 190 mA at 240 V AC rated; maximum 300 mA at 120 V AC |
| Inrush current, maximum | 16.3 A at 264 V |
| Backplane/EM bus output | 5 V DC, maximum 1.4 A |
| Engineering software | STEP 7 Micro/WIN SMART |
| Mounting standard | Standard DIN rail |
Features
Integrated capabilitiesWeb-server capability
The CPU supports browser-based service functions, subject to the approved firmware, user configuration and plant network-security policy.
Integrated control functions
Hardware counting, pulse-output and PID resources are provided within the CPU for defined motion-adjacent and process-control tasks.
Two communication paths
Ethernet/PROFINET and RS485 are available directly on the CPU for networked and serial devices.
Compatibility
System fitUse STEP 7 Micro/WIN SMART with the exact hardware and firmware selected in the approved project.
Preserve controller/device roles, device names and the maximum of eight connected IO devices.
Reapply only the approved web-server configuration and keep access within the site cybersecurity boundary.
Verify the 125 mm CPU width, ventilation space and the complete twenty-four-input/sixteen-output wiring map.
Replacement
Controlled exchangeBefore removal
- Record the complete 6ES7288-1SR40-0AA1 label, firmware, web-server configuration, network settings and serial parameters.
- Export the validated project and document every onboard point, expansion module and connected PROFINET device.
- Isolate the CPU mains supply and all external voltages present at the relay contacts.
Before restart
- Confirm the 125 mm housing, supply protection and exact terminal assignment before reconnecting the field wiring.
- Restore the approved project and security configuration, then test local I/O, Ethernet, RS485, web access and expansion paths.
- Do not use CPU SR30 or CPU SR20 as a direct substitute; both provide fewer onboard points, less memory and a different enclosure width.
FAQ
Customer checksQ01What must be checked before quoting 6ES7288-1SR40-0AA1?
Confirm the full nameplate, firmware, project revision, web-server use, expansion modules, connected PROFINET devices and the sixteen relay loads.
Q02Can 6ES7288-1SR40-0AA1 replace an SR30 CPU without project changes?
No. The SR40 has a wider housing, more local I/O and a larger memory allocation, so the enclosure, wiring and project configuration all require review.
Q03How should web-server access on 6ES7288-1SR40-0AA1 be handled after replacement?
Restore only the approved configuration, credentials and network controls; verify access from the authorized service network before returning the machine to production.
Q04Why must relay circuits be documented for 6ES7288-1SR40-0AA1?
The sixteen outputs may switch independently supplied field circuits. Their source voltage, protection and load must be known before removal or recommissioning.
Q05What proves 6ES7288-1SR40-0AA1 has been replaced successfully?
The approved project must run without diagnostics, all local and expanded I/O must pass point checks, communications must be restored and affected safety functions must be validated.
About IndustryParts
https://www.industryparts.com/Higher-I/O replacement planning starts with the complete SR40 execution
IndustryParts reviews 6ES7288-1SR40-0AA1 with its firmware, web-service use, local I/O map and network architecture attached to the enquiry record.
- SR40 width and I/O map retained
- Web-service boundary documented
- Relay and network records requested
Recommended Models
Alternative enquiries| 90QL KBA 80 A4 | 5ST3 012 | I5CA5P02000VA0000S |
| EASY400-P0W | MTL4541A | TZ2LE024M 082052 |
| Extron P/2 DA1 | CMS 1.1 S103046 | DSE 055034 |
| ABB ACS800-04-0400 | DP2500-R8 | 6ES5095-8ME01 6ES5375-0LC61 |
| R47 AQH140/3 | WTR1-P421S08 | 75-NZG/G 5/2 2941060 |
| MTL 5573 | PSF521/M EPH04/14/11 | 10P-10-4C-AS-R-Y-4M+V* 560276 CPV10-GE-ASI-4-Z |
| BRH0852P01A1A | KS-BE-04.0-090-000-01-00 | TE500CW12B2A1E6 |
| 5WG1 567-1AB01 | DEU21B 18221696 | NFSB100-S00 |
| 6ES7922-3BF00-0AB0 | X20IF1020 | Herion 0810100 |
| 1734-0W4 | TX60 L | DVP04PT-H2 |
