SIEMENS 6ES7314-6CH04-0AB0 – Compact CPU with Integrated I/O | SIMATIC S7-300
Engineering Background
The SIEMENS 6ES7314-6CH04-0AB0 is a high-performance Compact CPU from the SIMATIC S7-300 series — Siemens’ proven mid-range PLC platform trusted in industrial automation worldwide for over two decades. Designed for demanding process and discrete manufacturing environments, this module integrates CPU processing power with onboard digital and analog I/O, reducing panel footprint and wiring complexity without sacrificing capability.
Product Positioning
Targeted at automation engineers and system integrators who require a reliable, all-in-one control node for mid-complexity machine control, conveyor systems, process automation, and OEM equipment. The 6ES7314-6CH04-0AB0 is the preferred choice when panel space is constrained and a standalone CPU with integrated I/O eliminates the need for additional signal modules.
Complete Technical Specifications
| Order Number (SKU) | 6ES7314-6CH04-0AB0 |
| Product Family | SIMATIC S7-300 |
| Module Type | Compact CPU |
| Work Memory | 192 KB (integrated) |
| Load Memory | Micro Memory Card (MMC) required, up to 8 MB |
| Digital Inputs (DI) | 24 × DC 24V |
| Digital Outputs (DO) | 16 × DC 24V / 0.5A (transistor) |
| Analog Inputs (AI) | 4 × 12-bit resolution |
| Communication Interfaces | MPI (187.5 kbps – 12 Mbps) + PROFIBUS-DP Master/Slave |
| Max. Expandable Modules | Up to 8 modules per rack, up to 3 expansion racks |
| Processing Speed | 0.1 µs per binary instruction |
| Timers / Counters | 256 / 256 |
| Data Blocks | Up to 511 DB |
| Supply Voltage | DC 24V (via PS 307 or equivalent) |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +70°C |
| Protection Class | IP20 |
| Dimensions (W×H×D) | 80 × 125 × 130 mm |
| Weight | approx. 660 g |
| Certifications | CE, UL, cULus, ATEX (Zone 2) |
| Programming Software | STEP 7 V5.x / TIA Portal (via legacy support) |
| Country of Origin | Germany |
Proven Application Environments
- Discrete Manufacturing: Assembly lines, CNC machine tool control, robotic cell coordination
- Process Automation: Chemical dosing, water treatment, HVAC control loops
- Material Handling: Conveyor systems, palletizers, sorting stations
- OEM Equipment: Packaging machines, printing presses, textile machinery
- Building Automation: Energy management, access control integration via PROFIBUS-DP
- Retrofit Projects: Drop-in replacement for legacy S7-300 CPU 314 compact variants
Engineering Advantages
- Integrated I/O eliminates signal modules — 24DI + 16DO + 4AI onboard reduces BOM cost and panel wiring by up to 40% vs. modular CPU + SM configuration
- Dual communication ports — simultaneous MPI (HMI/programming) and PROFIBUS-DP (field device network) without additional CP modules
- 192 KB work memory — sufficient for complex ladder, FBD, and SCL programs with structured data blocks
- MMC-based load memory — non-volatile program storage survives power loss; easy program transfer via card swap
- STEP 7 ecosystem compatibility — full library support, S7 communication, and diagnostic buffer access
- Compact form factor — 80 mm width fits tight DIN-rail configurations; ideal for retrofit and space-constrained panels
System Architecture & Signal Flow
The 6ES7314-6CH04-0AB0 operates as the central processing node on a standard S7-300 rail. The integrated I/O front connector (40-pin) handles all 24DI, 16DO, and 4AI signals directly. The MPI port connects to SIMATIC HMI panels (TP/OP series) and the PG/PC programming interface. The integrated PROFIBUS-DP port acts as DP Master, managing up to 125 DP Slaves (ET 200 distributed I/O, drives, valve terminals). Expansion racks (ER) connect via IM 360/361 interface modules, extending the system to up to 32 additional signal modules across 3 racks. Program execution follows a cyclic scan model with configurable OB interrupt hierarchy (OB1, OB35, OB40, etc.).
Sourcing & Quality Verification
- Source: Authorized distribution channels and verified industrial surplus with full traceability
- Inspection: Each unit undergoes visual inspection, label verification (CE/UL markings, date codes), and functional power-on check before dispatch
- Authenticity: Holographic Siemens labels, correct MMC slot cover, and factory-sealed connectors verified on every unit
- Warranty: 12-month replacement warranty against manufacturing defects
- Documentation: Original Siemens datasheet and hardware manual available upon request
Procurement Process
- Confirm SKU: Verify 6ES7314-6CH04-0AB0 matches your existing hardware configuration or BOM
- Request Quote: Contact support@konmask.com with quantity and delivery timeline
- Order Confirmation: Pro-forma invoice issued within 1 business day
- Shipping: DHL Express / FedEx International Priority — typical transit 3–7 business days
- Customs & Documentation: Commercial invoice, packing list, and HS code 8537.10 provided for customs clearance
- After-Sales: Technical support available via email or WhatsApp for integration questions
Technical FAQ
Q: Can the 6ES7314-6CH04-0AB0 replace a CPU 314 (6ES7314-1AG14-0AB0)?
A: Yes, with caveats. The compact variant adds integrated I/O but uses the same rack and power supply. Program migration via STEP 7 is straightforward; verify I/O addressing offsets in your existing program.
Q: Is a Micro Memory Card (MMC) included?
A: MMC is not included by default. Please specify if you require an MMC (e.g., 6ES7953-8LJ31-0AA0 64KB or larger) when ordering.
Q: Does this CPU support PROFINET?
A: No. The 6ES7314-6CH04-0AB0 supports MPI and PROFIBUS-DP only. For PROFINET, consider the CPU 315-2 PN/DP (6ES7315-2EH14-0AB0) or add a CP 343-1 module.
Q: What HMI panels are compatible?
A: All SIMATIC HMI panels with MPI interface (TP177, OP177, MP277, etc.) and WinCC flexible / TIA Portal WinCC projects targeting S7-300 are fully compatible.
Q: Can I use TIA Portal to program this CPU?
A: TIA Portal V13 SP2 and later support S7-300 CPUs in “classic” mode. Full TIA Portal native support requires CPU 31xC firmware V3.3+; verify firmware version on your unit.
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