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The ABB 4943013-6 is a memory backup battery used in ABB industrial control systems, such as AC 800M or Advant Controller series, to retain critical data (programs, configurations, and volatile memory) during power outages. Below are its key details:

Primary (non-rechargeable) Lithium-Thionyl Chloride (LI-SOCI2) 1/2 AA-sized single cell 3.6V, size 14.5 x 25 mm, Non-restricted Battery for memory backup for PM810, PM825, PM851, PM856, PM860,PM861, PM864, PM865 and PM866.

1. Specifications

• Type: Lithium battery (non-rechargeable)

• Voltage: 3.6V (typical for industrial PLC/controller backup)

• Capacity: ~1.2 Ah (varies by usage conditions)

• Lifespan: ~2–5 years (depends on temperature & power cycles)

• Compatibility:

• ABB AC 800M controllers (e.g., PM851, PM861).

• Legacy Advant OCS systems.

2. Purpose & Function

• Retains: Program logic, process parameters, and real-time clock (RTC) during power loss.

• Prevents: Data corruption or loss when the controller is powered off or during brownouts.

3. Replacement Guide

When to Replace?

• Low Battery Alarm: Most ABB controllers display a warning (e.g., via LED or software).

• Date Code: Check the battery’s manufacturing date (typical shelf life: 5–10 years).

Steps to Replace:

1. Power On: Replace the battery while the controller is powered to avoid memory loss.

2. Locate Battery: Usually in the CPU module (e.g., slot near the RAM).

3. Swap Batteries: Remove the old battery and insert the new one (observe polarity!).

4. Verify: Check for errors in Control Builder M (ABB engineering tool).

4. Cross-Reference & Alternatives

• OEM Part: ABB 4943013-6 (official replacement).

• Equivalent Batteries:

• Tadiran TL-5902/S (3.6V lithium, widely compatible).

• EEMB ER14250 (3.6V, 1.2Ah).

• Caution: Avoid using non-lithium batteries (voltage drop risks memory loss).

5. Troubleshooting

• Memory Lost After Power Cycle?

• Confirm battery voltage (>3.0V under load).

• Check for corrosion on battery contacts.

• Battery Not Recognized?

• Verify compatibility with your ABB controller model.

6. Migration & Upgrades

• Legacy Note: If upgrading to newer ABB controllers (e.g., AC 800M High Integrity), confirm battery requirements.

• Backup Best Practices:

• Regularly save programs to external storage (Control Builder M).

• Use supercapacitors (in newer models) for longer backup life.

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