Siemens 6ES5340-3KA21 Memory Module

This memory module expands the storage capacity of SIMATIC S5 controllers. It holds user programs and system parameters for automation tasks. Therefore, this component enables complex logic sequences and data handling operations.

Physical Dimensions and Weight Specifications

The Siemens 6ES5340-3KA21 occupies one standard slot in the S5 rack. Its housing measures 233 mm in depth for backplane connectivity. The module weighs approximately 0.35 kg for straightforward handling. Consequently, technicians can install this unit without additional rack reinforcement.

Interface Types and Connection Layout

The Siemens 6ES5340-3KA21 provides a 20-pin backplane connector for power and data. A separate front panel carries no external field wiring connections. The module includes a memory submodule socket for additional storage expansion. Hence, users can upgrade capacity by replacing the submodule.

Component Count and Memory Architecture

This memory module contains one main board with static RAM chips. The board holds 8 KB of battery-backed memory for user programs. You will also find a lithium battery for data retention during power loss. An onboard write-protect switch prevents accidental program modifications.

Energy Storage and Power Consumption

The Siemens 6ES5340-3KA21 draws 100 mA from the 5V backplane supply. A lithium battery retains memory contents for 300 days without power. This battery maintains user programs during prolonged equipment shutdowns. Therefore, the module eliminates the need for frequent reprogramming after outages.

Data Integrity and Operational Reliability

The module includes a memory check function for error detection. It signals a front LED when the battery voltage drops too low. Users can replace the battery without removing the module from the rack. This hot-swap capability reduces downtime for maintenance procedures.