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The Siemens 6ES7291-8BA20-0XA0 is a Battery Module BC 291 designed for the SIMATIC S7-200 series. It plugs into the memory module receptacle of S7-22X CPUs to provide long-term backup of program and data memory.
Item No :
6ES7291-8BA20-0XA0Order(MOQ) :
1Payment :
EXWProduct Origin :
GermanyShipping Port :
Wuhan, Hubei, ChinaLead Time :
3-5 daysWeight :
0.189kgSpecifications
6ES7291-8BA20-0XA0 SIMATIC S7-200
| Origin | Germany |
| Net Weight (kg) | 0.189kg |
| Warranty |
1 year |
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1.How long is the delivery time?
If this item is in stock, it will take 2-3 working days to ship,
if it is not a conventional model,we will inform you of the specific delivery time.
2. Can you provide technical support?
We do not provide technical support.
But we have been working in this field for many years.
If you have any questions, please contact us and we will provide some constructive comments.
3. Can you provide warranty?
All parts we sell have one year warranty.
FAQ
Q1: What is the primary function of the 6ES7291-8BA20-0XA0?
It is a Battery Module BC 291 that provides long-term backup of program and data memory for SIMATIC S7-200 CPU 22x controllers. It plugs into the CPU's memory module receptacle.
Q2: Is this a PLC module?
No. This is a battery module/accessory, not a PLC or I/O module. It is an essential component for maintaining data retention in S7-200 systems.
Q3: Which controllers is this battery compatible with?
The BC 291 is designed for S7-200 CPU 22x controllers, including CPU224XP.
Q4: What are the battery specifications?
The module uses a 3V lithium battery with 300 mAh capacity. The battery weighs approximately 5 g.
Q5: What is the difference between the BC 291 and the clock battery (6ES7 297-1AA20-0XA0)?
The clock battery (6ES7 297-1AA20-0XA0) is designed to provide real-time clock backup for CPU 221 and 222, while the BC 291 (6ES7291-8BA20-0XA0) provides long-term data retention for the CPU memory. They serve different backup functions.
Q6: What is the lifecycle status of this product?
The 6ES7291-8BA20-0XA0 is classified as LTB (Last Time Buy) and is No Longer Stocked by some distributors. Availability is limited to surplus and repair markets.
Q7: What is the country of origin?
Origin information varies by source: some list Germany as the country of origin, while others indicate China. Verify with your supplier for the specific unit available.
Q8: Are there safety certifications?
The product listing indicates KEMA 04ATEX1130 X certification and classification for CLASS I, DIV.2 and CLASS I, ZONE 2 hazardous locations (T4 Ta=40°C).
| Model | Description |
|---|---|
| 6ES7 297-1AA20-0XA0 | Real-time clock battery for CPU 221/222; different function from BC 291 |
| 6ES7291-8BA20-0XA0 | BC 291 battery module for long-term data backup (this product) |
| S7-200 SMART | Modern replacement platform; consult Siemens for migration guidance from S7-200 |
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