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Description
The Allen-Bradley 1756-BA1 is a dedicated lithium battery assembly engineered to provide reliable memory backup for ControlLogix and FlexLogix programmable automation controllers. This non-rechargeable 3.0V DC lithium manganese dioxide cell is essential for maintaining user programs, configuration data, and variable memory tables during power interruptions or system shutdowns. It ensures that volatile RAM contents are preserved, preventing the need for time-consuming system reprogramming upon power restoration.
Features
- Nominal voltage: 3.0V DC
- Nominal capacity: 1800 mAh
- Form factor: 2/3A cylindrical lithium cell
- Integrated lead wire with dedicated connector for secure chassis interface
- Designed for legacy ControlLogix and FlexLogix processor modules
Applications
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Process & Manufacturing Automation: Safeguards critical process data and logic against unexpected power loss.
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Safety Control Systems: Maintains configuration integrity for safety-rated controller chassis.
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High-Availability Operations: Facilitates faster system recovery and uptime in redundant PLC configurations.
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Motion Control: Retains position data and servo configuration parameters for Kinetix and related drive systems.
Technical Specifications
| Product Model |
1756-BA1 |
| Battery Chemistry |
Lithium Manganese Dioxide |
| Nominal Voltage |
3.0V DC |
| Capacity |
1800 mAh |
| Operating Temperature |
Recommended storage near 30 degC |
| Weight |
0.04 kg |
Installation Guidelines
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Power Status: Always ensure the controller is properly powered down or the battery replacement procedure is performed in accordance with the specific controller manual to avoid memory corruption.
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Connector Seating: Ensure the lead wire connector is fully seated in the controller battery port. The 1756-BA1 uses a specific connector type; do not force or modify the connector.
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Temperature Management: Battery life is significantly impacted by ambient temperature. In environments exceeding 30 degC, monitor battery health closely and plan for more frequent replacement cycles.
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Storage: Store in a cool, dry environment. Avoid high-temperature areas to maximize shelf life prior to installation.
FAQ
What is the primary function of the 1756-BA1?
The 1756-BA1 acts as a volatile memory backup power source. It ensures that user-programmed logic and configuration data are not lost when the main power to the controller is disconnected.
Is the 1756-BA1 compatible with Series B ControlLogix processors?
No. Series B and later controllers typically require the 1756-BA2 battery, which utilizes a different connector size. The 1756-BA1 connector is physically incompatible with newer hardware; do not attempt to modify cables to bypass this restriction.
How long does the battery typically last?
Under normal operating conditions, the life expectancy is approximately 2 years. However, this duration can decrease significantly if the controller is frequently power-cycled or stored for extended periods without backplane power.
