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Copy| Product Name | Siemens 6ES7288-5BA01-0AA0 | SIMATIC S7-200 SMART Battery Signal Board |
| Item NO. | 2927190 |
| Weight | 0.1 kg = 0.2205 lb = 3.5274 oz |
| Category | SIEMENS |
| Brand | SIEMENS |
| Creation Time | 2026-10-26 |
CR1025-backed clock retention for supported S7-200 SMART CPUs.
Siemens 6ES7288-5BA01-0AA0 is the SB BA01 battery signal board used with supported SIMATIC S7-200 SMART CPUs. Its purpose is to provide a replaceable CR1025 battery path for clock retention when the controller supply is removed.
Inside Siemens 6ES7288-5BA01-0AA0, a 3 V, 30 mAh CR1025 cell supports approximately one year of hold-up under the stated conditions. The battery is not included with the board, and a voltage below 2.5 V is treated as a critical condition rather than an acceptable reserve level.
Status handling on Siemens 6ES7288-5BA01-0AA0 combines a red LED with CPU diagnostics. The state is evaluated at power-up and then updated daily while the CPU remains in RUN, so the physical indicator and diagnostic record should both be checked during routine panel inspection.
| Technical Item | Value |
|---|---|
| Brand | Siemens |
| Model | 6ES7288-5BA01-0AA0 |
| Product Name | SB BA01 battery signal board |
| Country | Germany |
| System Family | SIMATIC S7-200 SMART |
| Supported CPU Firmware | V2.0 or later |
| Battery Type | CR1025 lithium coin cell |
| Nominal Battery Voltage | 3 V |
| Nominal Battery Capacity | 30 mAh |
| Approximate Hold-Up | 1 year |
| Critical Battery Threshold | Below 2.5 V |
| Battery Included | No |
| Status Indication | Red LED and CPU diagnostic status |
| Status Update | At power-up, then daily in RUN |
| Power Dissipation | 0.6 W |
| 5 V DC Current Consumption | 18 mA |
| Dimensions (W × H × D) | 35 × 52.2 × 16 mm |
| Weight | 20 g |
When Siemens 6ES7288-5BA01-0AA0 detects a low cell condition, review both the local red indication and the controller diagnostic information. Confirm that the warning belongs to the installed battery board rather than clearing the message before its source is recorded.
Siemens 6ES7288-5BA01-0AA0 supports clock retention when normal controller power is absent; it is not the CPU operating supply. Check the real-time clock before and after a controlled power interruption when proving the retention path, while preserving the PLC project and process state.
Use the warning from Siemens 6ES7288-5BA01-0AA0 to schedule a cell change during an approved maintenance window. Record the clock value and machine state first, then verify the warning clears and the clock continues correctly after the replacement procedure is complete.
Before opening the controller, confirm that the CPU and firmware support Siemens 6ES7288-5BA01-0AA0. Save the current project and real-time-clock value, remove controller power and follow electrostatic-discharge handling so the service task does not introduce a separate CPU fault.
Seat Siemens 6ES7288-5BA01-0AA0 squarely in the signal-board position without bending the connector. Install the separately obtained CR1025 cell with the marked polarity visible and do not substitute a different coin-cell type merely because its diameter appears similar.
After installing Siemens 6ES7288-5BA01-0AA0, restore power, check the local indication and CPU diagnostics, then confirm the controller clock is correct. If maintenance rules permit, perform a controlled power-off retention check before returning the machine to service.
Check CR1025 polarity, terminal contact and actual cell voltage at Siemens 6ES7288-5BA01-0AA0. Also allow for the documented update timing; replacing the cell does not mean every status display changes continuously.
Siemens 6ES7288-5BA01-0AA0 is specified for a CR1025 cell with the required physical and electrical characteristics. A different diameter or thickness may not seat or contact correctly even when its nominal voltage is 3 V.
Confirm that Siemens 6ES7288-5BA01-0AA0 is supported by the CPU firmware, the cell is above 2.5 V and the board is fully seated. Then verify that the observed reset concerns the retained clock function rather than unrelated program data.
Siemens 6ES7288-5BA01-0AA0 is evaluated at controller power-up and then daily while the CPU remains in RUN. A maintenance check should therefore consider both the LED and the timing of the last status evaluation.
No. Siemens 6ES7288-5BA01-0AA0 and the CR1025 battery are separate items, so commissioning should include the correct fresh cell rather than assuming one is fitted at delivery.
Record the CR1025 installation date, measured voltage and the LED/diagnostic state of Siemens 6ES7288-5BA01-0AA0. That evidence helps distinguish normal cell aging from seating or compatibility problems.
