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- 1747-BA
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- 14.5 × 5.0 × 2.5 cm
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Allen Bradley 1747-BA Detailed Product Introduction and Technical Specifications
Product Overview
The Allen Bradley 1747-BA is a lithium backup battery designed for use with SLC 500 programmable logic controller systems. Its primary function is to provide continuous backup power for volatile RAM memory inside the controller during power outages or when the PLC is powered down.
The battery helps preserve user programs, processor memory, configuration data, and real-time clock information, preventing data loss and reducing system downtime during unexpected power interruptions.
The 1747-BA is widely used in industrial automation environments where continuous system memory retention is critical for production stability and operational reliability.
This battery module is commonly installed in manufacturing plants, packaging systems, automotive assembly lines, conveyor systems, process automation facilities, water treatment plants, food processing equipment, and industrial machinery using SLC 500 controllers.
The compact structure, long shelf life, and stable lithium chemistry make the 1747-BA a reliable memory retention solution for legacy industrial control systems.
Brand Information
| Item | Details |
|---|---|
| Brand | Allen Bradley |
| Product Model | 1747-BA |
| Product Type | Lithium Backup Battery |
| Product Family | PLC Memory Retention Accessory |
| Series | SLC 500 Series |
| Main Function | RAM Memory Backup |
| Battery Chemistry | Lithium |
| Installation Type | Plug-In Battery Assembly |
Product Series Introduction
SLC 500 Series
The SLC 500 series is one of the most recognized modular PLC automation platforms used in industrial control applications worldwide.
The platform was designed to support medium-scale automation systems requiring stable processing capability, flexible communication options, modular I/O expansion, and dependable long-term operation.
The SLC 500 family includes processors, communication modules, analog modules, digital I/O modules, power supplies, and system accessories such as memory backup batteries.
The 1747-BA belongs to the SLC 500 accessory family and serves as the memory retention battery for compatible SLC processors and memory modules.
Its function is extremely important because many industrial facilities rely on continuous program retention to avoid production interruption after power failures.
Detailed Technical Specifications of 1747-BA
Main Technical Parameters
| Parameter | Specification |
|---|---|
| Model | 1747-BA |
| Product Type | Lithium Backup Battery |
| Series | SLC 500 |
| Battery Chemistry | Lithium Thionyl Chloride |
| Nominal Voltage | 3V DC |
| Alternate Voltage Version | 3.6V DC |
| Typical Capacity | 850 mAh – 2400 mAh |
| Battery Type | Non-Rechargeable |
| Main Function | RAM Memory Retention |
| Connector Type | 2-Pin Connector |
| Installation Method | Plug-In |
| Compatible Controllers | SLC 5/01, 5/02, 5/03, 5/04, 5/05 |
| Compatible Memory Modules | 1747-M11, M12, M13, M14 |
| Shelf Life | Up to 10 Years |
| Estimated Service Life | 2–5 Years |
| Operating Temperature | -40°C to 85°C |
| Storage Temperature | 20°C to 25°C Recommended |
| Maximum Discharge Current | 7.0 mA |
| Self-Discharge Rate | Very Low |
| Housing Type | Cylindrical |
| Protection Feature | Leakage Resistant Design |
| Application Type | PLC Program Backup |
| Dimensions | 14.5 × 5.0 × 2.5 cm |
| Weight (kg) | 0.009 kg |
Technical information summarized from industrial product specification references.
Product Features
1. Reliable Memory Retention
The primary function of the 1747-BA is maintaining RAM memory inside SLC 500 controllers during power loss situations.
This prevents the loss of user programs, machine parameters, timer values, and operational settings.
Reliable memory retention is essential in industrial production systems where unexpected data loss can cause major downtime and production disruption.
2. Long Battery Service Life
The battery is designed with lithium chemistry technology that provides extremely low self-discharge characteristics.
Under normal operating conditions, the battery can provide several years of continuous backup performance.
The long shelf life also allows spare batteries to be stored for extended periods before installation.
3. Compact and Lightweight Structure
The compact cylindrical design allows simple installation inside compatible PLC systems without occupying excessive internal space.
Its lightweight construction also simplifies maintenance and replacement procedures.
4. Stable Performance in Industrial Environments
Industrial environments often contain vibration, temperature fluctuations, humidity, and electrical interference.
The 1747-BA is designed to operate reliably under these demanding conditions while maintaining stable memory backup capability.
5. Easy Replacement Procedure
The battery can be replaced quickly during scheduled maintenance procedures.
This simplifies preventive maintenance planning and minimizes system downtime during battery replacement operations.
Product Applications
Factory Automation Systems
The 1747-BA is commonly used in manufacturing systems operating SLC 500 controllers.
It preserves machine programs and operational parameters during facility power interruptions.
Automotive Production Lines
Automotive assembly systems rely on continuous PLC program retention to maintain synchronized machine operations.
The battery ensures critical controller memory remains intact during power shutdowns or maintenance activities.
Food and Beverage Processing
Food production systems often operate continuously for long periods.
Unexpected data loss could interrupt recipes, machine timing, or process sequences.
The 1747-BA helps maintain stable controller operation in these environments.
Packaging Equipment
Packaging systems require precise motion sequences and machine timing data.
The battery preserves this information during power interruptions, reducing restart time after shutdowns.
Water and Wastewater Treatment
Water treatment facilities frequently use SLC 500 controllers for pump control, valve operation, and monitoring systems.
The battery helps preserve process control logic and system configuration data.
Product Advantages
| Advantage | Description |
|---|---|
| Reliable Backup Power | Prevents memory loss during power failure |
| Long Operational Life | Low self-discharge lithium chemistry |
| Compact Structure | Easy installation inside PLC systems |
| Stable Industrial Performance | Suitable for harsh environments |
| Easy Maintenance | Quick replacement procedure |
| Strong Compatibility | Works with multiple SLC 500 controllers |
| Data Protection | Maintains programs and configuration data |
| Lightweight Design | Minimal additional system weight |
Recommended Models from the Same Series or Related Series
Related SLC 500 Modules and Accessories
| Model | Product Type | Main Function | Voltage / Communication | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1747-M13 | EEPROM Memory Module | Program Storage | Non-Volatile Memory | 5 × 3 × 1 cm | 0.02 kg |
| 1747-M15 | EEPROM Memory Module | Backup Program Storage | Non-Volatile Memory | 5 × 3 × 1 cm | 0.02 kg |
| 1747-ASB | Remote I/O Adapter | Distributed I/O Communication | Remote I/O | 14.5 × 13.1 × 3.5 cm | 0.168 kg |
| 1747-SN | Scanner Module | Remote I/O Scanning | Remote I/O | 24 × 13 × 7 cm | 1.80 kg |
| 1747-ACNR15 | Redundant Adapter Module | ControlNet Communication | ControlNet | 26.3 × 13.8 × 8.8 cm | 2.35 kg |
Recommended Popular Models from the Same Brand
Popular Industrial Automation Products
| Model | Product Category | Main Features | Application Area | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1756-EN2TR | Ethernet Communication Module | Dual Ethernet/IP Ports | Industrial Networks | 14 × 11 × 8 cm | 0.45 kg |
| 1769-L33ER | Compact PLC Controller | Integrated Ethernet Communication | Machine Automation | 18 × 12 × 9 cm | 0.92 kg |
| 1756-IB16 | Digital Input Module | 16-Point Digital Input | Factory Automation | 15 × 11 × 6 cm | 0.30 kg |
| 1769-IF8 | Analog Input Module | 8-Channel Analog Input | Process Control | 12 × 9 × 5 cm | 0.35 kg |
| 1783-US8T | Industrial Ethernet Switch | Managed Ethernet Switching | Industrial Networking | 16 × 12 × 5 cm | 0.80 kg |
Memory Backup Importance in PLC Systems
In industrial automation systems, memory retention is extremely important because many controllers use RAM-based program storage.
Without backup battery support, a sudden power loss may erase critical operational data including machine configurations, timers, counters, recipes, and user-developed control programs.
The 1747-BA helps eliminate this risk by continuously supplying backup power to the PLC memory circuit.
This greatly improves operational reliability and reduces unexpected production downtime.
Maintenance Characteristics
The battery should be inspected periodically as part of preventive maintenance procedures.
Most industrial facilities replace backup batteries according to scheduled maintenance intervals to avoid low-voltage conditions.
The SLC 500 controller system can typically generate battery-low warning indicators before complete battery depletion occurs.
Proper battery maintenance significantly improves long-term PLC reliability.
Community discussions among industrial automation technicians often emphasize proactive battery replacement to avoid program loss in legacy SLC systems.
Industrial Reliability
The 1747-BA has been widely used for many years in industrial automation environments because of its stable lithium chemistry and dependable backup performance.
The battery is designed for continuous industrial operation and supports long-term memory retention even under challenging environmental conditions.
Its combination of compact size, long service life, and reliable operation made it one of the most commonly used backup batteries within SLC 500 automation systems.
Many industrial facilities continue using this battery today in legacy automation systems that remain operational worldwide.
Summary
The Allen Bradley 1747-BA is a highly reliable lithium backup battery developed for SLC 500 programmable controller systems.
Its primary purpose is maintaining RAM memory retention during power interruptions, helping industrial facilities avoid program loss and production downtime.
The battery offers stable industrial performance, long service life, compact installation, and strong compatibility with multiple SLC 500 processors and memory modules.
For industrial environments operating legacy SLC 500 automation systems, the 1747-BA continues to be an important and dependable memory backup solution.