Replacing a missing clock-backup board?

Send Myrtle the full CPU number and tell us whether the existing BA01 is missing, damaged or reporting a low battery. We can help separate a board requirement from a simple CR1025 replacement before quotation.

Machines with time-stamped events

Useful where a compatible S7-200 SMART CPU must retain real-time-clock continuity for alarms, batches or maintenance records after control power is removed.

Seasonal and intermittently powered equipment

Suitable for panels that may remain de-energized between production campaigns yet still require sensible date and time information at restart.

Compact OEM control cabinets

The signal-board format adds clock backup without occupying the footprint of a full expansion module, a practical fit for packaging, assembly and small process skids.

Replacement and maintenance stock

A useful spare for sites operating S7-200 SMART CPUs equipped for the BA01, especially when low-battery diagnostics or damaged board hardware calls for planned service.

Is a CR1025 battery supplied with 6ES7288-5BA01-0AA0?

No. Siemens identifies the SB BA01 as the battery board only; the CR1025 coin cell must be purchased separately.

What does the SB BA01 preserve when the controller loses power?

Its role is to provide battery backup for the real-time clock function of a compatible S7-200 SMART CPU. It is not an I/O expansion board.

How should the CR1025 cell be installed?

Install the new cell with the positive side facing upward and the negative side toward the printed circuit board, following the Siemens installation procedure.

How is a weak battery reported?

When battery voltage falls below the critical level, the BA01 red LED remains on and the controller can issue a low-battery diagnostic indication.

How long can the battery provide retention?

Siemens lists an approximate retention period of one year. Actual service life can vary with storage, temperature and the condition of the selected cell.

What information should be checked before ordering a replacement?

Confirm the complete article number, CPU family, existing signal-board position and whether a fresh CR1025 cell is also required.

Careful sourcing starts with the small details

A battery board may be compact, but selecting it still depends on the controller family, complete order number and maintenance objective. PLCEXPORT helps customers check those details before a quotation is prepared.

Our team supplies PLC, DCS and safety-system components to maintenance teams and machine builders worldwide, with support for current, discontinued and difficult-to-source parts.

Tell us what must still be correct after the power returns

Send the complete CPU and board numbers, required quantity and delivery country. If the problem is only a depleted CR1025 rather than the BA01 board itself, include the diagnostic symptoms so Myrtle can review the request more accurately.