Allen-Bradley 1747-BA SLC 500 Battery | 3V Lithium Backup In Stock

Allen-Bradley 1747-BA | Reliable Automation Component for SLC 500 Controllers

Field Application & Operational Analysis

From a Site Reliability Engineer’s perspective, the Allen-Bradley 1747-BA is not merely a consumable — it is a mission-critical safeguard embedded at the heart of SLC 500 programmable logic controller architectures. In process optimization environments where system uptime is non-negotiable, the 1747-BA delivers the continuous 3V DC backup voltage required to preserve volatile program memory and retentive data registers across unplanned power interruptions, scheduled maintenance windows, and emergency shutdowns. Its role in sustaining operational excellence cannot be overstated: a single battery failure can cascade into full program loss, forcing unplanned reloads and halting production lines for hours.

Engineered for durability in demanding industrial environments, the 1747-BA employs manganese dioxide (MnO ) primary lithium chemistry — a formulation selected for its flat discharge curve, low self-discharge rate, and resistance to thermal stress across a wide operating range (0°C to 60°C). Installation requires no special tooling: with the processor de-energized, the depleted cell is disconnected from its JST-style connector and replaced in under two minutes. Field technicians should note that the battery compartment is accessible without removing the processor from the rack, minimizing exposure time and reducing the risk of accidental I/O module disturbance during the swap procedure.

For facilities operating legacy SLC 500 infrastructure — particularly in end-of-life (EOL) environments where original equipment manufacturers no longer provide active support — maintaining a certified stock of 1747-BA units as critical spare parts is a fundamental tenet of proactive reliability engineering. Automation components like this battery represent low-cost insurance against high-consequence failures in mission-critical applications.

Key Operational Features

Guaranteed Program Retention: Sustains volatile SRAM and retentive data across full power loss events — zero data corruption risk during planned or unplanned outages.
High Availability Chemistry: MnO lithium cell delivers 5+ year service life under standard duty cycles, reducing maintenance frequency and unscheduled intervention.
Seamless Integration: Drop-in OEM replacement for all SLC 5/01, 5/02, 5/03, 5/04, and 5/05 processor variants (1747-L5xx series) — no firmware changes or configuration adjustments required.
Redundancy-Ready Design: Compatible with dual-processor redundancy configurations; supports hot-standby architectures where continuous memory integrity is mandatory.
Regulatory Compliance: UL Listed, CE marked, RoHS compliant — meets international safety and environmental standards for global deployment.
Process Optimization Support: Eliminates unplanned downtime caused by battery-induced memory loss, directly contributing to OEE (Overall Equipment Effectiveness) improvement targets.

Maintenance & Performance Benchmarks

The 1747-BA is designed to integrate seamlessly into both small-scale standalone SLC 500 installations and large distributed I/O module networks spanning multiple racks and remote I/O drops. In high-density system integration scenarios — where a single SLC 5/05 processor manages Ethernet-connected HMI stations, remote DeviceNet nodes, and analog I/O modules simultaneously — the battery’s stable voltage output ensures that all retentive data tables, PID tuning parameters, and communication configuration blocks remain intact regardless of power event duration.

Performance benchmarks confirm that the 1747-BA maintains nominal output voltage ( 2.8V) for a minimum of 5 years at 25°C ambient, with accelerated life testing validating acceptable performance up to 60°C continuous exposure. For facilities in tropical climates or high-ambient enclosures, a proactive replacement interval of 3 years is recommended to maintain system reliability margins. Battery voltage can be monitored via the processor’s built-in battery status bit (S:2/1 in the status file), enabling predictive maintenance integration with SCADA or DCS supervisory systems without additional hardware investment.

Comprehensive Data Sheet

| Attribute | Technical Data | |—|—| | Part Number | 1747-BA | | Manufacturer | Allen-Bradley (Rockwell Automation) | | Product Series | SLC 500 | | Battery Chemistry | Manganese Dioxide (MnO ) Primary Lithium | | Nominal Voltage | 3.0V DC | | Minimum Operating Voltage | 2.8V DC | | Expected Service Life | 5+ years @ 25°C | | Operating Temperature | 0°C to 60°C (32°F to 140°F) | | Storage Temperature | -40°C to 85°C (-40°F to 185°F) | | Compatible Processors | SLC 5/01, 5/02, 5/03, 5/04, 5/05 (1747-L5xx) | | Connector Type | JST-style polarized connector | | Compliance | UL Listed, CE, RoHS | | Replacement Interval | 3-5 years (condition-based) | | Weight | 2.9g | | Country of Origin | United States |

Professional Logistics & Sourcing Excellence

Every Allen-Bradley 1747-BA unit dispatched from our facility ships in original factory packaging, preserving the hermetic seal integrity of the lithium cell and ensuring that shelf life calculations begin from the moment of installation — not from an unknown intermediate storage period. For time-sensitive production recovery scenarios, same-day dispatch is available for orders confirmed before the daily logistics cutoff, with worldwide express courier options covering North America, Europe, Southeast Asia, and the Middle East.

We specialize in global supply chain solutions for EOL and legacy automation components. As SLC 500 platforms transition toward end-of-support status, sourcing certified 1747-BA stock through verified distribution channels becomes increasingly critical. Our inventory is continuously replenished through authorized supply networks, providing procurement engineers with a reliable, traceable source for both single-unit emergency replacements and bulk preventive maintenance kits.

Engineering Support & FAQ

Q1: What is the correct installation procedure for the 1747-BA in an active production environment?
A: The SLC 500 processor should be placed in Program mode and the system de-energized before battery replacement. Disconnect the old battery from the JST connector, insert the new 1747-BA ensuring correct polarity, and restore power. The processor will automatically validate memory integrity on the next power-up cycle. Total procedure time is typically under 5 minutes.

Q2: Is the 1747-BA compatible with all firmware versions of the SLC 5/05 processor?
A: Yes. The 1747-BA is a hardware component with no firmware dependency. It is compatible across all firmware revisions of the SLC 5/01 through 5/05 processor family. No firmware update is required before or after battery replacement.

Q3: How can I monitor battery health without removing the processor from service?
A: The SLC 500 processor exposes a battery status bit at S:2/1 in the processor status file. When this bit transitions to 1, the battery voltage has dropped below the acceptable threshold. This bit can be mapped to an HMI alarm or SCADA alert for predictive maintenance integration, enabling planned replacement before memory loss risk becomes critical.

Q4: What is the warranty coverage for the 1747-BA and how is a claim initiated?
A: Each unit carries a 12-month warranty from the date of shipment, covering manufacturing defects and premature capacity loss under normal operating conditions. To initiate a warranty claim, contact our technical support team via email with the order reference number and a description of the observed fault. Replacement units are dispatched within 2 business days of claim approval.

Q5: Can the 1747-BA be used in high-vibration or high-humidity industrial environments?
A: The 1747-BA is rated for standard industrial environments within the SLC 500 processor enclosure. For installations subject to extreme vibration (e.g., press lines or mobile equipment), ensure the processor rack is mounted on vibration-damping hardware per Rockwell Automation installation guidelines. The battery itself has no humidity sensitivity when installed within a properly sealed enclosure.

Q6: Do you supply 1747-BA batteries in bulk quantities for preventive maintenance programs?
A: Yes. Bulk procurement packages are available for facilities managing large SLC 500 fleets. Volume pricing and consolidated shipping options are available — contact our sales team directly for a customized quotation aligned with your maintenance schedule and inventory requirements.

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