SIEMENS 6ES7318-2AJ00-0AB0 CPU 318-2 DP Processor Module – SIMATIC S7-300 Series
When a central processing unit fails on the plant floor, the consequences cascade instantly — production lines halt, safety interlocks trip, and every minute of downtime translates directly into lost revenue and potential safety risk. The SIEMENS 6ES7318-2AJ00-0AB0 CPU 318-2 DP is the nerve center of your SIMATIC S7-300 control system; without it, your entire automation architecture goes dark. No other module can substitute for it — it is the irreplaceable intelligence that orchestrates every I/O signal, every PROFIBUS node, and every process variable in your installation.
Within the SIMATIC S7-300 family, the CPU 318-2 DP occupies the top tier of the classic S7-300 lineup. It delivers the largest program memory, the highest I/O capacity, and dual PROFIBUS-DP master/slave interfaces — making it the preferred choice for complex, multi-network manufacturing cells, process plants, and infrastructure projects worldwide. Deployed across automotive assembly, chemical processing, power generation, and water treatment facilities on every continent, the 6ES7318-2AJ00-0AB0 has earned its reputation as one of the most capable and reliable controllers in Siemens’ industrial automation portfolio.
Technical Specifications
- Order Number (SKU): 6ES7318-2AJ00-0AB0
- Product Family: SIMATIC S7-300
- CPU Type: CPU 318-2 DP
- Work Memory: 1 MB (for program and data)
- Load Memory: Integrated 1 MB RAM; expandable via MMC (Micro Memory Card)
- Processing Speed (Bit Operations): 0.1 µs per bit instruction
- Processing Speed (Word Operations): 0.1 µs per word instruction
- Processing Speed (Floating Point): 0.6 µs per floating-point instruction
- Digital I/O (max): 65,536 inputs / 65,536 outputs
- Analog I/O (max): 4,096 inputs / 4,096 outputs
- Communication Interfaces: 1× MPI/DP (12 Mbit/s), 1× DP (12 Mbit/s)
- PROFIBUS-DP: Dual-port — can operate as DP master and DP slave simultaneously
- Timers / Counters: 2,048 / 2,048
- Data Blocks: Up to 8,191
- Supply Voltage: 24 V DC (via backplane bus from PS module)
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: -40 °C to +70 °C
- Dimensions (W × H × D): 80 × 125 × 130 mm
- Weight: Approx. 940 g
- Protection Class: IP20
- Certifications: CE, UL, cULus, FM, ATEX (zone 2)
Key Features & Benefits
- Dual PROFIBUS-DP Interfaces: Simultaneously manage two independent DP networks — one as master, one as slave — enabling seamless integration into hierarchical automation architectures without additional communication modules.
- 1 MB Work Memory: The largest work memory in the classic S7-300 CPU range, supporting complex ladder logic, function block diagrams, and structured text programs without memory constraints.
- High-Speed Instruction Execution: 0.1 µs bit/word processing ensures deterministic, real-time control even in high-cycle-rate applications such as press lines and packaging machinery.
- Micro Memory Card (MMC) Support: Program retention without battery dependency — the MMC stores the user program non-volatilely, eliminating battery maintenance and reducing lifecycle costs.
- Integrated MPI Network: Built-in MPI port allows direct connection to SIMATIC HMI panels, programming devices (PG/PC), and other S7 CPUs for coordinated multi-controller systems.
- STEP 7 & TIA Portal Compatible: Fully programmable via Siemens STEP 7 V5.x; also accessible through TIA Portal with the S7-300 migration toolset.
- Hot-Swap Rack Design: S7-300 modular rack architecture allows module replacement without full system shutdown in many configurations, minimizing maintenance downtime.
- Extensive Diagnostic Capabilities: Integrated hardware and software diagnostics with LED status indicators and STEP 7 diagnostic buffer for rapid fault identification and resolution.
Industry & Equipment Applications
- Automotive Manufacturing: Body-in-white welding lines, paint shop conveyors, engine assembly test benches
- Chemical & Petrochemical: Reactor control, distillation column automation, batch process management
- Food & Beverage: Filling and capping lines, pasteurization control, CIP (clean-in-place) systems
- Power Generation & Utilities: Turbine control auxiliaries, substation automation, water treatment SCADA integration
- Pharmaceutical: GMP-compliant batch control, cleanroom HVAC automation, packaging line control
- Material Handling & Logistics: Automated storage and retrieval systems (AS/RS), conveyor routing, palletizing cells
- Pulp & Paper / Printing: Web tension control, dryer section automation, color registration systems
- Mining & Minerals: Crusher control, conveyor belt management, flotation cell automation
System Integration & Compatible Parts
The 6ES7318-2AJ00-0AB0 is designed to operate within the SIMATIC S7-300 modular rack system. Typical companion components include:
- Power Supply Modules: 6ES7307-1BA01-0AA0 (2A), 6ES7307-1EA01-0AA0 (5A), 6ES7307-1KA02-0AA0 (10A)
- Digital Input Modules: 6ES7321-1BH02-0AA0 (16 DI × 24VDC), 6ES7321-1BL00-0AA0 (32 DI)
- Digital Output Modules: 6ES7322-1BH01-0AA0 (16 DO × 24VDC), 6ES7322-1BL00-0AA0 (32 DO)
- Analog Input Modules: 6ES7331-7KF02-0AB0 (8 AI), 6ES7331-7NF10-0AB0 (8 AI high-speed)
- Analog Output Modules: 6ES7332-5HF00-0AB0 (8 AO)
- Interface Modules (IM): 6ES7360-3AA01-0AA0 / 6ES7361-3CA01-0AA0 for multi-rack expansion
- Micro Memory Card: 6ES7953-8LJ31-0AA0 (4 MB MMC) for program storage
- PROFIBUS Connectors: 6ES7972-0BA52-0XA0 (90° connector with PG socket)
Our Quality Assurance Process
At Konmask.com, every SIEMENS 6ES7318-2AJ00-0AB0 unit undergoes a rigorous multi-stage verification process before shipment:
- Visual Inspection: Examination of housing integrity, connector pins, label authenticity, and firmware version markings against Siemens factory specifications.
- Functional Power-On Test: Each CPU is powered up and verified for correct LED status indication (RUN/STOP/SF/BF/DC5V) and MPI communication response.
- Authenticity Verification: Cross-reference of serial numbers and date codes against known genuine Siemens production batches to screen out counterfeit units.
- Anti-Static Packaging: Modules are packed in ESD-safe bags with foam cushioning and moisture-barrier outer cartons to ensure safe transit.
- Documentation: Each shipment includes a product data sheet, test record, and packing list. CE declaration of conformity available upon request.
How to Order
- Submit an Inquiry: Contact us via the form on this page, email support@konmask.com, or WhatsApp/WeChat at +0086 19859288691.
- Confirm Requirements: Specify quantity, required delivery timeline, and any documentation needs (test reports, COC, etc.).
- Receive Quotation: We respond within 24 hours with pricing, lead time, and shipping options (DHL, FedEx, UPS, sea freight).
- Order Confirmation & Payment: Confirm the proforma invoice and proceed with payment via T/T (bank transfer), PayPal, or other agreed methods.
- Shipment & Tracking: Your order is dispatched with full tracking information and commercial invoice for customs clearance.
Why Choose Konmask.com?
- ✅ Specialized in Industrial Automation Components — PLC, DCS, HMI, drives, and servo systems from all major brands.
- ✅ Global Sourcing Network — Access to genuine new, surplus, and refurbished stock from verified suppliers worldwide.
- ✅ Fast Response — Dedicated B2B inquiry team responds within 24 hours, 6 days a week.
- ✅ Flexible Shipping — Express courier (DHL/FedEx/UPS) and sea freight options to 150+ countries.
- ✅ Technical Support — Our engineers can assist with compatibility verification, system integration questions, and replacement identification.
- ✅ Competitive Pricing — Direct sourcing relationships enable us to offer market-competitive prices without compromising on quality.
Frequently Asked Questions
- Q: Is the 6ES7318-2AJ00-0AB0 still in production by Siemens?
- A: The CPU 318-2 DP has reached end-of-life status in Siemens’ current portfolio. However, Konmask.com maintains access to genuine new-old-stock (NOS) and professionally refurbished units to support ongoing maintenance and replacement needs.
- Q: What is the difference between 6ES7318-2AJ00-0AB0 and 6ES7318-3EL01-0AB0?
- A: The 6ES7318-2AJ00-0AB0 is the CPU 318-2 DP with dual PROFIBUS-DP interfaces. The 6ES7318-3EL01-0AB0 is the CPU 318-3 PN/DP, which adds a PROFINET interface. If your system uses PROFIBUS exclusively, the 318-2 DP is the correct choice.
- Q: Can I use a Micro Memory Card from another S7-300 CPU in this module?
- A: Yes, SIMATIC S7-300 Micro Memory Cards (MMC) are generally interchangeable across S7-300 CPUs. However, always verify the MMC capacity meets the program size requirements of the CPU 318-2 DP (up to 8 MB MMC supported).
- Q: What programming software is required for the 6ES7318-2AJ00-0AB0?
- A: The primary programming environment is Siemens STEP 7 Professional V5.5 or later (Classic). It is also accessible via TIA Portal V13 SP1 and above using the S7-300 migration package.
- Q: Do you provide a warranty on this product?
- A: Yes. All units sold by Konmask.com carry a minimum 90-day warranty against defects in materials and workmanship. Extended warranty options are available — please inquire at the time of order.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
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