Siemens 6ES7414-4HM14-0AB0 CPU 414H

Series#: Siemens

Product Details

SIEMENS SIMATIC S7-400 CPU 414H (6ES7414-4HM14-0AB0) – High-availability redundant controller for mission-critical process automation.
Integrated dual synchronization interfaces for seamless hot-standby redundancy in S7-400H systems.
2.8 MB total memory (1.4 MB load + 1.4 MB working) for complex, large-scale control programs.
Supports MPI/DP and PROFIBUS DP interfaces for flexible fieldbus connectivity.
Programmable via STEP 7 V5.5+ with LAD, FBD, STL, SCL, and Graph languages.
Unlimited S7 counters and timers (RAM-limited) with retentivity, plus enhanced diagnostics for rapid fault resolution.
Guaranteed 100% Original factory condition, offering fast and secure worldwide delivery.

Specification

The SIEMENS SIMATIC S7-400 CPU 414H (MLFB 6ES7414-4HM14-0AB0) is a high-performance, fault-tolerant central processing unit designed for the S7-400H redundant automation platform. Engineered for the most demanding industrial environments—including chemical, oil & gas, power generation, and process industries—this CPU delivers exceptional reliability through its integrated dual synchronization modules, enabling true hot-standby operation with automatic switchover. With a generous 2.8 MB memory architecture and support for unlimited S7 counters and timers, the 6ES7414-4HM14-0AB0 handles complex control algorithms, extensive data management, and large-scale distributed I/O networks with ease. Its robust communication capabilities, including MPI/DP and PROFIBUS DP interfaces, ensure seamless integration into existing plant infrastructures. This CPU is programmed using Siemens STEP 7 V5.5+ and supports multiple IEC languages, making it a versatile choice for engineers building high-availability systems. Below is the comprehensive technical specification table.

Category	Specification
Product Type	CPU 414H for S7-400H Redundant Systems
MLFB / Order Number	6ES7414-4HM14-0AB0
Memory – Total	2.8 MB (1.4 MB Load Memory + 1.4 MB Working Memory)
Memory Expansion	Supports optional external memory cards (e.g., MMC) for additional load memory
Interfaces – Integrated	1x MPI/DP (RS485), 1x PROFIBUS DP (RS485), 2x Sync Module Interfaces (for redundancy)
Redundancy Support	Full hot-standby with automatic switchover; synchronization via fiber-optic or electrical modules
Programming Software	STEP 7 V5.5 + SP1 or higher
Programming Languages	LAD, FBD, STL, SCL, Graph (S7-Graph)
Max. Number of Data Blocks (DBs)	Limited by memory capacity; typically > 4096
Max. Number of Function Blocks (FBs)	Limited by memory capacity; typically > 2048
Max. Number of Functions (FCs)	Limited by memory capacity; typically > 2048
Organization Blocks (OBs)	All standard OBs (OB1, OB10-OB122, etc.) plus S7-400H-specific OBs for redundancy
S7 Counters	Unlimited (RAM-limited); retentive configuration available
S7 Timers	Unlimited (RAM-limited); retentive configuration available
Bit Operation Time	Approx. 0.01 µs (typical)
Word Operation Time	Approx. 0.02 µs (typical)
Fixed-Point Arithmetic	Approx. 0.05 µs (typical)
Floating-Point Arithmetic	Approx. 0.09 µs (typical)
Power Supply	External 24 V DC (via backplane bus); typical consumption 1.5 A
Diagnostics	Integrated diagnostic buffer, status LEDs, and system error reporting
Ambient Temperature	0 °C to +60 °C (horizontal installation); 0 °C to +40 °C (vertical)
Weight	Approx. 1.2 kg
Approvals	CE, cULus, ATEX (when used in appropriate system configuration)
Application Areas	Chemical, Oil & Gas, Power Generation, Water/Wastewater, Metal Processing, Pharmaceutical