Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 1747-BA |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Product Type | Lithium battery assembly for RAM memory retention |
| Cell Chemistry | Lithium manganese dioxide (Li-MnO2), non-rechargeable |
| Cell Reference | FDK CR14250SE (1/2 AA cylindrical), Sanyo-assembled |
| Nominal Voltage | 3.0 V DC |
| Rated Capacity | 1200 mAh (typical) |
| Service Life (in-circuit) | ~2 years on SLC 5/02, 5/03, 5/04, 5/05; up to 5 years on SLC 5/01 |
| Shelf Life | Up to 10 years when stored per recommendations |
| Cell Dimensions | 14.5 mm diameter × 25 mm length (0.58 in × 1.04 in) |
| Battery Weight | Approx. 12 g |
| Termination | Wire leads with 6-pin Phoenix-style connector (brown plug) |
| Lithium Content | 0.23 g metallic lithium per battery |
| Compatible Processors | SLC 5/01, 5/02, 5/03, 5/04, 5/05; 1746-BAS; 1747-PT1 HHT; MicroLogix 1500 (1764-LxP); MicroLogix 1400 (1766-L32xxx) |
| Recommended Storage | 20–25 °C (68–77 °F), 40–60% relative humidity, cool and dry |
| Transportation Class | UN Class 9 Dangerous Goods (lithium metal) — max 2 batteries per inner package for US ground |
| Reference Publications | 1747-UM011 / 1747-UM009 (user manuals); 1747-IN515 (lithium handling guidelines) |
Main Features and Advantages
Factory-Specified Chemistry and Fit: The 1747-BA is built around the FDK CR14250SE half-AA lithium cell — the same chemistry and physical format that Rockwell Automation validated across the SLC 500 processor family. Because the cell, wire gauge, connector shell, and plug polarity all match the original OEM specification, the battery drops directly into the memory compartment without modification, improvisation, or adapter leads. This direct fit eliminates the miswiring and polarity mistakes that occasionally accompany generic substitutes, and it preserves the processor’s warranty and agency certificationsreplacenc.com+1.
Long-Interval Memory Retention: With a 1200 mAh capacity and the very low self-discharge characteristic of Li-MnO2 chemistry, the 1747-BA sustains SLC processor RAM for approximately two years of continuous service on the higher-memory 5/02 through 5/05 models, and up to five years on lower-memory SLC 5/01 processors. When maintained on the shelf under the recommended 20–25 °C / 40–60% RH conditions, the battery retains its rated capacity for up to ten years — allowing maintenance planners to hold spares on hand without worrying about degradation before installationdosupply.com+2.
Hot-Swappable on Powered Processors: On SLC 5/03, 5/04, and 5/05 processors, an internal capacitor provides at least 30 minutes of RAM hold-up once the battery is disconnected, provided the processor retains control power. This means the 1747-BA can be replaced with the processor still mounted in the chassis and control power still applied — no program upload beforehand, no downtime beyond a few minutes of careful work. On 5/01 and 5/02 processors the swap should be performed with the processor powered, or a program backup uploaded in advance, since these models do not carry the same capacitor hold-up windowrockwellautomation.com+1.
Predictable End-of-Life Warning: Every SLC processor monitors battery voltage continuously and illuminates the front-panel BATT LED when the 1747-BA approaches its end of useful life. This early-warning indication gives maintenance teams a defined window to schedule a planned replacement rather than discovering the problem after a power event has already erased the program — a substantially lower-risk operating model than running processors to silent failuredosupply.com+1.
Documented Handling and Compliance: Rockwell publishes specific handling, storage, and transportation guidance for the 1747-BA in instruction 1747-IN515, and the battery is classified as a Class 9 dangerous good for shipment under UN regulations owing to its 0.23 g of metallic lithium content. Sourcing genuine, properly certified stock ensures the installation stays compliant with hazmat transport rules, avoids customs delays on international shipments, and preserves full traceability back to the original manufacturer
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