Brand:Siemens Item No.:6ES7291-8BA20-0XA0 Product Origin:Germany Product Dimensions:16.5 x 17.5 x 9.9 mm Product Weight:0.03 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Siemens 6ES7291-8BA20-0XA0 Battery Module is a compact accessory intended for compatible Siemens PLC systems. Unlike a CPU or I/O module, it serves a supporting role by providing the battery-related backup function required by the associated automation equipment.
Battery backup can be important in industrial control systems where certain controller information needs to remain available following a power interruption. For maintenance teams, maintaining the correct battery configuration is therefore an important part of PLC service and reliability management.
With dimensions of only 16.5 × 17.5 × 9.9 mm, the 6ES7291-8BA20-0XA0 occupies very little space. Its lightweight construction also makes it suitable for compact PLC assemblies and control cabinets where component size is an important consideration.
When replacing or servicing this type of component, engineers should verify the exact PLC hardware configuration and follow the appropriate installation procedure to ensure that the backup function operates as intended.
Technical Specifications
Parameter
Specification
Model
Siemens 6ES7291-8BA20-0XA0
Product Type
Battery Module
Brand
Siemens
Application
PLC Backup and Data Retention
Dimensions
16.5 × 17.5 × 9.9 mm
Weight
0.03 kg (0.07 lb)
Installation
Compatible Siemens PLC System
Primary Function
Battery Backup Support
The extremely compact dimensions make this battery module suitable for installations where available space inside the PLC assembly is limited. Despite its small physical size, correct selection and installation remain important for maintaining the intended backup function.
Recommended Related Models
For Siemens PLC applications and compact automation systems, the following models can be considered alongside the 6ES7291-8BA20-0XA0:
Model
Product Type
Siemens 6ES7211-1AE40-0XB0
Compact CPU
Siemens 6ES7211-1BE40-0XB0
Compact CPU
Siemens 6ES7211-1HE40-0XB0
Compact CPU
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Compact CPU
Siemens 6ES7212-1BE40-0XB0
Compact CPU
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Applications
The Siemens 6ES7291-8BA20-0XA0 Battery Module is a compact battery accessory designed for compatible Siemens PLC applications where backup power is required for retaining selected controller data during power interruptions.
Its small form factor makes it suitable for installations where cabinet space is limited. The module can be used as part of PLC maintenance and replacement activities, helping maintain the intended backup function of the associated control system.
Typical applications include:
PLC control systems requiring battery backup
Industrial automation control panels
S7-200 PLC maintenance
Battery replacement and servicing
Retention of supported PLC data during power loss
Machine automation systems
Process control equipment
Compact control cabinet installations
Advantages
The 6ES7291-8BA20-0XA0 is designed as a compact battery module for compatible Siemens automation equipment. Its small dimensions allow it to be integrated into space-constrained control installations without adding significant mechanical load.
Key advantages include:
Compact construction for space-limited PLC installations
Dedicated battery module design for compatible Siemens controllers
Simple maintenance concept for battery-related service work
Low weight with minimal impact on cabinet installation
Suitable for industrial automation environments
Useful for PLC maintenance and replacement operations
Designed for integration with compatible Siemens control equipment
Technical FAQs
1. What is the Siemens 6ES7291-8BA20-0XA0 used for?
The 6ES7291-8BA20-0XA0 is a battery module used with compatible Siemens PLC equipment to provide the required backup function for supported controller data.
2. Why is a battery module used in a PLC system?
A battery module can provide backup power for supported memory or data-retention functions when the primary PLC power supply is interrupted.
3. Is the 6ES7291-8BA20-0XA0 a CPU module?
No. It is a battery module and does not perform PLC processing, logic execution, or I/O control.
4. Can the battery module be used for PLC maintenance?
Yes. It can be relevant during scheduled maintenance or battery replacement procedures for compatible Siemens PLC installations.
5. What should be checked before replacing the battery module?
The PLC model, installed hardware configuration, battery requirements, polarity, installation procedure, and data-retention requirements should be checked before replacement.
6. Can an incorrect battery module affect PLC operation?
Yes. Using an incompatible battery or installing it incorrectly can prevent the intended backup function from operating correctly and may result in loss of retained data where applicable.
7. Does the battery module control PLC inputs and outputs?
No. PLC input and output processing is handled by the controller and associated I/O modules. The battery module provides a backup-related function.
8. What happens if the battery backup function is lost?
Depending on the PLC configuration and retained data, loss of battery backup can affect the retention of supported data during a power interruption. The exact behavior depends on the controller and memory configuration.
9. Is battery condition important during PLC maintenance?
Yes. Battery condition should be considered during preventive maintenance, particularly in older PLC installations where reliable data retention is important.
10. Should the PLC be powered down before battery replacement?
The correct procedure depends on the specific Siemens PLC and system configuration. The applicable equipment documentation and maintenance procedure should always be followed before removing or replacing the battery module.
