Siemens 6ES5377-0BB41 Memory Module

Technical Overview

The Siemens 6ES5377-0BB41 is a memory module from the SIMATIC S5 programmable controller series . This unit provides reliable non-volatile storage for user programs, system data, and configuration parameters using FLASH EPROM technology . It retains stored data without requiring a backup battery, simplifying maintenance and lowering long-term costs . The module is specifically designed for use with the S5-115U, S5-135U, and S5-155U PLCs . Furthermore, this memory expansion module supports a wide operating temperature range, ensuring dependable performance in demanding industrial environments.

Technical Specifications

Parameter	Specification
Manufacturer	Siemens
Model Number	6ES5377-0BB41
Product Type	Memory Module / FLASH EPROM
System Compatibility	SIMATIC S5-115U, S5-135U, S5-155U
Memory Type	FLASH EPROM
Installation	Plugs into CPU
Operating Temperature	0°C to +60°C
Storage Temperature	-40°C to +85°C
Weight	0.02 – 0.1 kg
Product Lifecycle	Obsolete / Discontinued
Country of Origin	Germany

Key Features

Non-Volatile FLASH EPROM Storage – The Siemens 6ES5377-0BB41 retains programs and data without a backup battery, ensuring secure storage and eliminating maintenance costs .

High Environmental Tolerance – The module operates reliably from 0°C to +60°C and withstands storage temperatures from -40°C to +85°C .

Easy Plug-and-Play Installation – Users can install the module easily by inserting it directly into the CPU’s memory slot without special tools .

S5 System Compatibility – The memory module integrates seamlessly with S5-115U, S5-135U, and S5-155U controllers, providing a reliable solution for legacy system maintenance .

Applications

The Siemens 6ES5377-0BB41 suits program storage, system upgrades, and backup solutions for SIMATIC S5-based automation systems. It is ideal for manufacturing, process control, and legacy system maintenance requiring reliable memory expansion.