Siemens 6ES7 315-2AH14-0AB0 is a high-performance CPU module in the S7-300 series PLC, designed specifically for medium to large automation control systems, with powerful data processing and expansion capabilities. This product integrates 256KB working memory and supports high-speed processing of binary instructions in 0.05 μ s and floating-point operations in 0.45 μ s, enabling efficient execution of complex logic control tasks. Its core interface includes one MPI/DP interface, supports PROFIBUS-DP master/slave mode, can connect up to 16 S7-300/400 devices or programmers, and form 32 CPU networks through global data communication, but requires additional modules to achieve Ethernet communication. The product needs to be used in conjunction with a miniature memory card (MMC, up to 8MB), supporting program loading, data archiving, and recipe management. It can also expand up to 32 modules and connect up to 16384 I/O points (centralized 1024 points), adapting to large-scale distributed systems.
In terms of hardware, the module adopts 24V DC power supply, rated current of 850mA, built-in 2A fuse, supports 5ms power-off holding, working temperature range of 0-60 ℃, storage temperature of -20-70 ℃, and meets industrial environmental standards.
Processor: Equipped with a high-performance 32-bit processor, the binary instruction execution time is only 0.05 μ s, and the floating-point operation time is 0.45 μ s. It can efficiently handle complex logic control, arithmetic operations, and PID tuning tasks.
Work memory: Built in 256KB RAM, supporting high-speed access to programs and data; The loading memory is expanded through a miniature memory card (MMC) and supports up to 8MB, meeting the requirements of large-scale projects.
Input/output (I/O) capability
Centralized I/O: Directly connect up to 1024 digital I/O points or 256 analog I/O points.
Distributed I/O: It can be expanded to 16384 I/O points (including 1024 centralized I/O points) through the PROFIBUS-DP interface, supports synchronous mode, and ensures data consistency in distributed systems.
communication interface
MPI interface: supports multi-point communication, can simultaneously connect 16 devices (such as programmers, touch screens), and build a simple network.
PROFIBUS-DP interface: master/slave mode, transmission rate up to 12Mbps, compatible with PROFIBUS-DP V1 standard, enhancing slave diagnostic and parameterization capabilities.
Industrial Ethernet (some models): Supports PROFINET protocol to achieve high-speed data exchange with upper computer or remote I/O.
Scalability
Module Expansion: Supports up to 32 S7-300 series modules (4-row structure), covering digital/analog input/output, high-speed counting, PWM output and other functional modules.
Network Expansion: Through the "Global Data Communication" function, a network consisting of 16 CPUs can be formed to achieve cross device data sharing.
Power requirements
Power supply voltage: 24V DC, built-in power module, no additional configuration required.
Power Expansion: Provide 5V power to the expansion module through the I/O bus, with a total consumption of ≤ CPU power rating (usually 10A); When exceeded, an external 24V DC power supply is required.
Environmental adaptability
Working temperature: 0-60 ℃ (wide temperature models support -25-60 ℃), suitable for extreme climates.
Storage temperature: -20-70 ℃ to ensure long-term stability of the equipment.
Protection level: Compliant with IEC 60068-2 standard, resistant to electromagnetic interference (EMC), shock resistant (compliant with IEC 60068-2-6), and capable of stable operation in dusty and humid environments.
safety certification
Certification standards: Passed CE, UL, cULus certification, in compliance with the EU Low Voltage Directive (LVD) and Electromagnetic Compatibility (EMC) specifications.
Redundant design: supports fault diagnosis and redundant configuration to improve system reliability; Integrated self diagnostic function, real-time monitoring of hardware status.
Software and Programming
Programming software: Compatible with STEP 7 V5. x and above versions, supporting programming languages such as SCL (Structured Control Language) and S7-GRAPH (Sequential Function Diagram).
Process functions: Built in PID control, motion control (such as simple positioning tasks), and "standard/modular PID control" software package to simplify the development process.
other characteristics
Real time clock: Built in battery powered clock, supports timestamp recording and periodic task scheduling.
Data management: Implement data archiving, recipe management, and project backup through MMC cards.
Diagnostic function: Integrated SIMATIC S7-PDIAG tool, supports extended process diagnosis, and improves maintenance efficiency.
This product, with its excellent performance, flexible scalability, and rigorous industrial grade design, is widely used in fields such as automotive manufacturing, petrochemicals, food processing, and logistics warehousing, becoming the core control unit for medium and large-scale automation projects.
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