Industrial Automation Solution – Siemens 6ES7288-1SR40-0AA0 | S7-200 SMART Series
Where This Product Is Used
The Siemens 6ES7288-1SR40-0AA0 CPU SR40 is a high-performance compact PLC at the core of the S7-200 SMART platform. It is widely deployed across demanding industrial environments where reliable discrete and analog control is essential:
- Packaging Machinery – Coordinating conveyor sequencing, labeling, and case-sealing lines with deterministic scan times under 1 ms/K.
- Water & Wastewater Treatment – Pump station control, level monitoring, and dosing systems requiring 24/7 unattended operation.
- HVAC & Building Automation – Fan coil unit control, chiller sequencing, and BMS integration via Modbus RTU/TCP.
- Textile & Printing Equipment – Tension control, register correction, and web-break detection using high-speed counter inputs.
- Food & Beverage Processing – Batch mixing, filling, and CIP cycle management with relay outputs rated for inductive loads.
- Material Handling & Conveyor Systems – Multi-zone sorting, divert control, and barcode scanner integration over Ethernet.
- OEM Machine Builders – Cost-effective, compact controller for standalone machines requiring Ethernet connectivity without an additional communication module.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 6ES7288-1SR40-0AA0 |
| Series | SIMATIC S7-200 SMART |
| CPU Type | SR40 (Standard, Relay Output) |
| Digital Inputs | 24 × DC 24 V |
| Digital Outputs | 16 × Relay (2 A / 250 VAC) |
| Analog Inputs | 1 × 0–10 V (built-in) |
| Program Memory | 24 KB |
| Data Memory | 10 KB (retentive) |
| High-Speed Counters | 4 × up to 100 kHz (single-phase) |
| Pulse Outputs | 3 × up to 100 kHz (transistor emulated via relay board) |
| Communication Ports | 1 × Ethernet (RJ45), 1 × RS-485 |
| Protocols Supported | Modbus RTU/TCP, USS, S7 Protocol, Open User Communication |
| Real-Time Clock | Yes (battery-backed) |
| Supply Voltage | AC 85–264 V / DC 24 V |
| Power Consumption | ≤ 15 W |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | −40 °C to +70 °C |
| Protection Rating | IP20 |
| Dimensions (W × H × D) | 175 × 100 × 81 mm |
| Weight | approx. 600 g |
| Programming Software | STEP 7-Micro/WIN SMART V2.x |
| Country of Origin | Germany / China (Siemens-manufactured) |
Why Engineers Specify This Model
- Relay Outputs for Mixed-Voltage Loads – The SR40 variant’s 16 relay outputs switch both AC and DC loads up to 250 VAC / 2 A, eliminating external interposing relays in most panel designs.
- Built-in Ethernet – No Extra Module Required – Native RJ45 port enables SCADA/HMI connectivity and remote programming without purchasing a CP module, reducing BOM cost and panel footprint.
- 40 I/O in a Single Compact Housing – Handles mid-complexity machines without expansion modules, simplifying wiring and reducing failure points.
- 100 kHz High-Speed Counters – Suitable for encoder feedback, flow metering, and pulse-train positioning without a dedicated motion controller.
- Proven S7-200 SMART Ecosystem – Compatible with the full range of EM expansion modules, HMI panels (SMART LINE), and STEP 7-Micro/WIN SMART programming environment.
- Long Production Lifecycle – Siemens continues active production and support, making it a safe long-term design choice for OEMs.
Complete System Bill of Materials
For a fully operational S7-200 SMART control system based on the 6ES7288-1SR40-0AA0, engineers typically specify:
- CPU: 6ES7288-1SR40-0AA0 (this unit)
- Digital I/O Expansion: 6ES7288-2DE08-0AA0 (EM DE08, 8 DI) or 6ES7288-2DR08-0AA0 (EM DR08, 8 DO relay)
- Analog Expansion: 6ES7288-3AE04-0AA0 (EM AE04, 4 AI) / 6ES7288-3AQ02-0AA0 (EM AQ02, 2 AO)
- HMI Panel: 6AV6648-0CC11-3AX0 (SMART LINE 700 IE V3) or compatible SMART LINE series
- Programming Cable: Standard Ethernet patch cable (Cat5e or above)
- Power Supply: 6EP1332-1SH52 (SITOP PSU100S, 24 VDC / 5 A) for sensor supply
- Memory Card: 6ES7288-8BA00-0AA0 (Micro SD for program backup)
Compliance & Industry Standards
- CE Marking – EU Low Voltage Directive & EMC Directive compliant
- UL Listed – UL 508 (Industrial Control Equipment)
- cULus – Canadian market approval
- RCM (formerly C-Tick) – Australia/New Zealand EMC compliance
- KC Mark – Korea Communications Commission approval
- IEC 61131-2 – Programmable controllers hardware standard
- ATEX / IECEx – Not rated for Zone 0/1; use appropriate barriers for hazardous areas
Quality Assurance & Sourcing
Every unit offered by Konmask.com undergoes the following verification process before dispatch:
- Authenticity Check – Holographic label, firmware version, and housing markings verified against Siemens OEM specifications.
- Functional Power-On Test – Unit is powered and communication ports are confirmed active.
- ESD-Safe Packaging – Shipped in anti-static bag with foam insert and outer carton rated for international freight.
- Traceability – Batch and serial number recorded for each shipment; available on request.
- Sourcing – Procured from Siemens-authorized distribution channels and verified secondary market with documented chain of custody.
How to Source This Part
- Add to Cart – Click “Add to Cart” above. Bulk pricing is available for orders of 5+ units; contact us before checkout.
- Request a Quote – Email support@konmask.com with your required quantity, delivery timeline, and destination country for a formal quotation.
- Lead Time – In-stock units ship within 1–2 business days. Out-of-stock orders: 7–21 business days depending on sourcing channel.
- Shipping – DHL Express, FedEx International Priority, and sea freight (LCL/FCL) available. Export documentation (commercial invoice, packing list, CO) provided.
- Payment – T/T (bank transfer), PayPal, credit card, and Alibaba Trade Assurance accepted.
Application-Specific FAQ
Q: Can the 6ES7288-1SR40-0AA0 control a servo drive directly?
A: The SR40 has relay outputs only; it cannot generate high-frequency pulse trains for servo positioning. For motion control, pair it with a transistor-output CPU (e.g., ST40) or use a dedicated motion expansion module.
Q: How many expansion modules can be connected?
A: Up to 6 EM expansion modules can be connected to the left side of the CPU SR40, supporting up to 188 additional I/O points.
Q: Is STEP 7-Micro/WIN SMART free to download?
A: Yes. Siemens provides STEP 7-Micro/WIN SMART as a free download from the Siemens Industry Online Support (SIOS) portal. No license key is required.
Q: Can this CPU communicate with a Siemens S7-1200 or S7-300?
A: Yes, via S7 Protocol over Ethernet (PUT/GET instructions). The S7-200 SMART acts as a client or server in the S7 communication topology.
Q: What is the difference between SR40 and ST40?
A: SR40 has relay digital outputs (AC/DC loads, slower switching); ST40 has transistor (solid-state) outputs (DC loads only, faster switching, suitable for pulse output / motion). Choose SR40 for mixed-voltage or inductive load applications.
Q: Is this product suitable for export? Are there any trade restrictions?
A: Siemens S7-200 SMART products are generally classified under EAR99 or low-ECCN categories. However, buyers are responsible for verifying import regulations in their destination country. Konmask.com provides standard export documentation.
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