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The 6ES5373-1AA41 functions as a memory module for the Siemens SIMATIC S5 PLC system. This unit stores user programs and system parameters in non-volatile EPROM memory. It plugs directly into the CPU or expansion rack for easy installation. Therefore, this module enables fast program backup and recovery for legacy automation systems.
Technical Specifications
We engineered this memory module for reliable program storage in industrial environments. Its compact design fits into a dedicated memory slot on the S5 CPU. Moreover, the module retains data without any battery backup for permanent storage.
| Parameter | Specification |
|---|---|
| Dimensions (W x H x D) | 3.9 x 2.8 x 0.8 inches (99 x 71 x 20 mm) |
| Weight | 0.09 kg (0.2 lbs) |
| Memory Type | EPROM (Erasable Programmable Read-Only Memory) |
| Memory Capacity | 32 KB (32,768 bytes) |
| Data Retention | >10 years without power |
| Access Time | 150 ns typical |
| Compatible CPUs | S5-115U, S5-135U, S5-155U |
| Programming Method | External EPROM programmer |
| Erasure Method | UV light (253.7 nm wavelength) |
| Erasure Time | 20 minutes typical |
| Write Cycles | 1 (program once, read many times) |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
Memory Architecture
The 6ES5373-1AA41 uses UV-erasable EPROM technology for program storage. A quartz window on the top exposes the chip for erasure with UV light. The module stores both the user program and the system configuration parameters. Consequently, you can completely restore a CPU by inserting this single module.
Program Storage and Protection
This memory module protects user programs from accidental modification or corruption. Once programmed, the EPROM retains data without any power source. The module includes a protective label to cover the UV erasure window. Hence, sunlight or fluorescent light will not accidentally erase the stored program.
Compatibility and System Integration
The 6ES5373-1AA41 works with all major S5 CPU families including the 115U, 135U, and 155U. Insert the module into the dedicated memory socket on the CPU front panel. The CPU automatically recognizes the memory type on power-up. Therefore, no additional configuration parameters are necessary for operation.
Programming and Erasure Process
Program this memory module using a standard EPROM programmer device. Erase the module by exposing the quartz window to UV light for 20 minutes. Cover the window with the opaque label after programming to prevent accidental erasure. Consequently, you can reuse the same module up to 100 times with proper erasure.
Data Retention and Reliability
The 6ES5373-1AA41 retains stored data for over ten years without any power. The EPROM technology provides excellent data stability in harsh environments. The module withstands vibration and temperature extremes without data corruption. Hence, you can store programmed modules as spare parts for many years.
Energy Storage and Power Requirements
This memory module contains no battery or capacitor energy storage components. It draws minimal current only during CPU read operations. The module requires no power for data retention whatsoever. Therefore, the stored program will never be lost due to battery failure.
Installation and Handling
Mount the 6ES5373-1AA41 into the CPU memory slot with correct orientation. Push firmly until the module seats completely in the socket. Do not touch the gold-plated edge connector with bare fingers. Cover the quartz window with the protective label after programming. Store spare modules in opaque containers away from direct sunlight. Never expose the module to UV light while installed in a running CPU.