SIEMENS 6ES7314-6EH04-0AB0 CPU 314C-2 DP Compact PLC with Integrated Digital I/O – SIMATIC S7-300 Series
Imagine a continuous production line — a bottling plant, an automotive assembly cell, or a water treatment facility — suddenly losing its central controller. Conveyors stop, valves freeze in position, alarms cascade across the HMI, and every minute of downtime translates directly into lost revenue and potential safety risk. The CPU at the heart of the control cabinet is not a commodity; it is the brain of the entire operation. Without a reliable, specification-matched replacement, recovery can take days rather than hours.
The SIEMENS 6ES7314-6EH04-0AB0 is the CPU 314C-2 DP — a compact, high-performance central processing unit within the legendary SIMATIC S7-300 platform. Combining an onboard digital I/O interface with an integrated PROFIBUS DP master/slave port, this module occupies a unique position in the S7-300 lineup: it delivers mid-range processing power in a space-efficient form factor, making it the preferred choice for distributed automation architectures across discrete manufacturing, process control, and infrastructure projects worldwide. With millions of S7-300 installations still active globally, the 6ES7314-6EH04-0AB0 remains one of the most sought-after spare and replacement CPUs in the industrial automation market.
Technical Specifications
- Manufacturer: Siemens AG
- Part Number / SKU: 6ES7314-6EH04-0AB0
- Series: SIMATIC S7-300
- Module Type: Compact CPU (CPU 314C-2 DP)
- Integrated Digital Inputs: 24 × DC 24 V
- Integrated Digital Outputs: 16 × DC 24 V / 0.5 A
- Integrated Analog Inputs: 4 × 12-bit
- Integrated Analog Outputs: 2 × 12-bit
- Work Memory: 192 KB
- Load Memory: Expandable via MMC (Micro Memory Card)
- Processing Speed (Bit Operations): 0.1 µs
- Communication Interface 1: MPI (Multi-Point Interface)
- Communication Interface 2: PROFIBUS DP Master/Slave (integrated)
- Max. I/O Addresses: 2048 bytes input / 2048 bytes output
- Counters / Timers: 256 / 256
- Supply Voltage: DC 24 V
- Weight: Approx. 720 g
- Mounting: DIN rail (S7-300 standard)
- Operating Temperature: 0 °C to +60 °C
- Protection Class: IP20
- Firmware Version: V3.3 (0AB0 variant)
Key Features & Benefits
- Compact All-in-One Design: Integrates CPU, digital I/O, analog I/O, and PROFIBUS DP into a single module — reducing cabinet space and wiring complexity.
- Dual Communication Ports: MPI for programming and HMI connectivity; PROFIBUS DP for distributed I/O, drives, and field devices — no additional CP module required.
- High Processing Speed: 0.1 µs per bit instruction enables fast scan cycles suitable for motion-adjacent and high-speed discrete control tasks.
- 192 KB Work Memory: Sufficient for complex ladder, FBD, STL, and SCL programs with extensive data blocks.
- Broad S7-300 Ecosystem Compatibility: Fully compatible with the entire S7-300 signal module, function module, and communication module range.
- STEP 7 & TIA Portal Support: Programmable via Siemens STEP 7 V5.x and TIA Portal (with legacy support), protecting existing engineering investments.
- Proven Reliability: Designed for 24/7 industrial operation with robust EMC shielding and wide temperature tolerance.
Industry & Equipment Applications
- Automotive Manufacturing: Body-in-white welding lines, paint shop conveyors, assembly cell sequencing
- Food & Beverage: Filling and capping machines, pasteurization control, CIP systems
- Water & Wastewater Treatment: Pump station control, dosing systems, SCADA integration via PROFIBUS
- Pharmaceutical: Batch process control, clean-room HVAC automation, packaging lines
- Oil & Gas / Petrochemical: Compressor control panels, pipeline monitoring, valve actuation
- Building Automation & Infrastructure: Tunnel ventilation, power distribution monitoring, elevator control
- Machine Tool & Robotics: CNC auxiliary control, robot cell I/O management, safety interlock systems
System Integration & Compatible Parts
The 6ES7314-6EH04-0AB0 operates within the standard S7-300 rack architecture. Typical companion components include:
- Power Supply: 6ES7307-1BA01-0AA0 / 6ES7307-1EA01-0AA0 (PS 307)
- Digital Input Modules: 6ES7321-1BH02-0AA0 (SM 321, 16 × DC 24 V DI)
- Digital Output Modules: 6ES7322-1BH01-0AA0 (SM 322, 16 × DC 24 V DO)
- Analog I/O Modules: 6ES7331-7KF02-0AB0 / 6ES7332-5HB01-0AB0
- Micro Memory Card: 6ES7953-8LJ31-0AA0 (MMC 4 MB) — required for program storage
- PROFIBUS DP Slaves: ET 200M, ET 200S, ET 200SP distributed I/O stations
- Programming Cable: 6ES7972-0CB20-0XA0 (PC Adapter USB)
Our Quality Assurance Process
At Konmask.com, every unit of the 6ES7314-6EH04-0AB0 passes through a structured verification process before shipment:
- Visual Inspection: Checking for physical damage, corrosion, and counterfeit indicators on housing, labels, and PCB markings.
- Functional Power-On Test: Module is powered and firmware version confirmed against Siemens documentation.
- Communication Port Verification: MPI and PROFIBUS DP interfaces tested for signal integrity.
- Authenticity Cross-Check: Serial number and date code verified against known genuine Siemens production batches.
- Secure Packaging: Anti-static bag + foam-lined carton with desiccant for safe international shipping.
How to Order
- Submit your inquiry via the Contact / RFQ form on this page or email [email protected].
- Provide your required quantity, delivery timeline, and destination country.
- Our team will respond within 24 business hours with availability confirmation and a formal quotation.
- Upon PO confirmation, we arrange export documentation, customs clearance support, and tracked international shipping.
- Post-delivery technical support is available for integration and commissioning questions.
Why Choose Konmask.com?
- ✅ Specialized in Industrial Automation Spares: PLC, DCS, HMI, drives, and I/O modules from leading global brands.
- ✅ Global B2B Export Experience: Serving customers in Europe, Southeast Asia, the Middle East, and the Americas.
- ✅ Competitive Lead Times: In-stock items ship within 3–5 business days; sourced items within 7–15 days.
- ✅ Transparent Sourcing: We disclose product condition (new/surplus/refurbished) clearly on every quotation.
- ✅ Dedicated Account Support: One point of contact from inquiry through delivery and after-sales.
Frequently Asked Questions
Q1: Is the 6ES7314-6EH04-0AB0 still in production by Siemens?
A: The SIMATIC S7-300 series has been phased out of active production by Siemens, with the platform reaching end-of-life. However, Konmask.com maintains stock of genuine surplus and refurbished units to support ongoing maintenance and replacement needs.
Q2: What is the difference between 6ES7314-6EH04-0AB0 and 6ES7314-6EH04-0AB0 earlier firmware versions?
A: The 0AB0 suffix denotes the current hardware revision with firmware V3.3, offering improved diagnostics and extended MMC compatibility compared to earlier 0AA0 variants. Always verify firmware compatibility with your existing STEP 7 project version.
Q3: Does this CPU require a Micro Memory Card (MMC)?
A: Yes. The 6ES7314-6EH04-0AB0 requires an MMC for program storage and retentive data. The CPU will not run a user program without an MMC inserted. We recommend the 6ES7953-8LJ31-0AA0 (4 MB).
Q4: Can I program this CPU with TIA Portal?
A: The S7-300 CPU 314C-2 DP is natively programmed with STEP 7 V5.x. TIA Portal supports S7-300 via a legacy compatibility layer, but full feature support requires STEP 7 Professional.
Q5: What shipping methods are available for international orders?
A: We ship via DHL Express, FedEx International, and UPS Worldwide. For bulk orders, sea freight and air freight consolidation are available. All shipments include tracking and export documentation.
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