Machine Automation Solution — Siemens 6ES7214-2AD23-0XB0 | S7-200 SMART CPU SR20
Where This Product Is Used
The Siemens 6ES7214-2AD23-0XB0 (CPU SR20) is a compact programmable logic controller from the S7-200 SMART series, engineered for standalone and networked machine-level automation. It is widely deployed across the following industrial environments:
- Packaging Machinery — Controlling fill-seal cycles, conveyor indexing, and reject gates in food and pharmaceutical packaging lines.
- HVAC & Building Automation — Managing pump sequencing, fan speed staging, and chiller interlocks in commercial building systems.
- Conveyor & Material Handling — Coordinating belt drives, diverters, and accumulation zones in warehouse and logistics facilities.
- Injection Moulding & Press Control — Sequencing clamp, inject, cool, and eject cycles with relay output control of solenoid valves and motor contactors.
- Water Treatment & Pump Stations — Automating dosing pumps, level control, and alarm annunciation in municipal and industrial water systems.
- OEM Machine Builders — Embedded as the primary controller in compact machines where panel space and cost are constrained.
Technical Specifications
| Parameter | Value |
|---|---|
| Order Number | 6ES7214-2AD23-0XB0 |
| Series | SIMATIC S7-200 SMART |
| CPU Type | CPU SR20 |
| Power Supply | AC 85–264 V |
| Digital Inputs | 12 × DC 24 V |
| Digital Outputs | 8 × Relay (2 A per point) |
| Program Memory | 24 KB |
| Data Memory | 10 KB |
| Onboard Ethernet | 1 × RJ45 (PROFINET-compatible) |
| Expansion Modules | Up to 6 signal modules |
| High-Speed Counters | 4 × up to 200 kHz |
| Pulse Outputs | 3 × up to 100 kHz (transistor models) |
| Real-Time Clock | Yes (integrated) |
| Programming Software | STEP 7-Micro/WIN SMART |
| Operating Temperature | 0 °C to +55 °C |
| Protection Rating | IP20 |
| Dimensions (W×H×D) | 90 × 100 × 81 mm |
| Weight | Approx. 500 g |
Why Engineers Specify This Model
- AC Power Input — Eliminates the need for a separate 24 VDC PSU in panels fed directly from mains, reducing BOM cost and panel footprint.
- Relay Outputs — Directly switch inductive loads (contactors, solenoids, lamps) without interposing relays, simplifying wiring.
- Onboard Ethernet — Native PROFINET/TCP-IP port enables HMI connectivity (SMART LINE panels), SCADA integration, and remote monitoring without additional communication modules.
- Compact Form Factor — 90 mm width fits standard 35 mm DIN rail in space-constrained enclosures.
- Proven S7-200 SMART Ecosystem — Compatible with the full range of EM expansion modules (analog, temperature, positioning) and SMART HMI panels.
- STEP 7-Micro/WIN SMART — Free programming software with ladder, FBD, and STL editors; supports library reuse and motion control wizards.
Complete System Bill of Materials
A typical compact automation panel built around the CPU SR20 includes:
- CPU: 6ES7214-2AD23-0XB0 (this unit)
- Analog Expansion: 6ES7288-3AE04-0AA0 (EM AE04 — 4 × AI)
- HMI Panel: 6AV6648-0CC11-3AX0 (SMART 700 IE V3, 7″)
- Programming Cable: Standard Ethernet patch cable (Cat5e or above)
- Power Supply: Not required — CPU SR20 accepts AC input directly
- DIN Rail: 35 mm × 7.5 mm steel rail, min. 150 mm length
- Terminal Blocks: Phoenix Contact or equivalent, 2.5 mm²
Contact support@konmask.com for a complete panel BOM quotation.
Compliance & Industry Standards
- CE Marking — EU Low Voltage Directive & EMC Directive
- UL Listed — UL 508 (Industrial Control Equipment)
- cULus — Canadian market compliance
- RCM — Australia / New Zealand
- KC — Korea Certification
- IEC 61131-2 — Programmable Controllers Hardware Standard
- PROFINET Conformance Class A
Quality Assurance & Sourcing
Konmask.com sources Siemens automation components exclusively through verified distribution channels. Every unit undergoes the following before dispatch:
- Visual inspection of housing, label, and connector integrity
- Firmware version verification against Siemens release notes
- Functional power-on test with STEP 7-Micro/WIN SMART
- Anti-static packaging with humidity indicator card
- Traceable lot documentation retained for 3 years
We do not supply grey-market, refurbished, or counterfeit product. All units ship with original Siemens factory packaging and documentation.
How to Source This Part
- Add to Cart — Click the purchase button above for standard stock orders.
- Request a Quote — For orders of 5+ units or project-based procurement, email support@konmask.com with your project name, quantity, and required delivery date.
- Expedited Sourcing — If the item shows out of stock, contact us directly. We maintain relationships with multiple Siemens-authorised distributors and can typically source within 3–7 business days.
- System Integration Support — Our engineering team can assist with panel design, module selection, and STEP 7-Micro/WIN SMART configuration. Enquire via email or phone.
Application-Specific FAQ
Q: Can the CPU SR20 control a servo drive directly?
A: The SR20 relay output variant (this model) is not suitable for high-speed pulse-train servo control. For servo axis control, specify the CPU ST20 (6ES7214-2AS23-0XB0) with transistor outputs, or add a dedicated motion module.
Q: How many HMI panels can be connected simultaneously?
A: The onboard Ethernet port supports one active HMI connection via S7 protocol. For multi-panel architectures, use an unmanaged Ethernet switch.
Q: Is this CPU compatible with TIA Portal?
A: No. The S7-200 SMART series is programmed exclusively with STEP 7-Micro/WIN SMART. TIA Portal supports S7-300, S7-400, S7-1200, and S7-1500 families.
Q: What is the maximum number of expansion modules?
A: Up to 6 signal expansion modules (EM series) can be connected to the CPU SR20 via the local bus connector on the right side of the unit.
Q: Can this unit operate in high-humidity environments?
A: The CPU SR20 is rated IP20 and is designed for installation inside a sealed control enclosure (minimum IP54 enclosure recommended) in humid or dusty environments.
Q: What warranty applies?
A: Konmask.com provides a 12-month warranty against manufacturing defects on all Siemens products supplied. Warranty claims are processed via support@konmask.com.
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