How to Select an Interface Relay for PLC Outputs
A step-by-step guide to matching PLC output type, coil voltage and current, contact rating, and socket style when selecting an interface relay.
The Siemens 6ES7297-0AX30-0XA0 is a SIMATIC S7-1200 Battery Board BB 1297, a plug-in board for the signal-board slot of an S7-12xx CPU (firmware V3.0 or higher) that buffers the real-time clock over long power-off periods using a CR1025 battery, which is not included. It is rated IP20 and weighs 40 g.
This board only makes sense on installations where the RTC must survive extended power-off periods beyond the CPU's own 480-hour capacitor backup; short outages don't need it. Because it plugs into the signal-board slot rather than a full expansion slot, adding it does not reduce the CPU's signal-module or communication-module count. The CR1025 battery ships separately, so it has to be ordered alongside this board to be functional.
| Alarms | Yes |
|---|---|
| Diagnostics function | Yes |
| Diagnostics indication LED: for maintenance | Yes; The maintenance LED (MAINT) of the PLC signals that the battery needs to be replaced. |
| IP degree of protection | IP20 |
|---|
| CE mark | Yes |
|---|---|
| CSA approval | Yes |
| FM approval | Yes |
| RCM (formerly C-TICK) | Yes |
| Marine approval | Yes |
| Part number | 6ES7297-0AX30-0XA0 |
|---|---|
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 6940408101333 |
| ETIM class | EC002584 |
| eCl@ss | 27242292 |
| Free fall: Fall height, max. | 0.3 m; five times, in product package |
|---|---|
| Ambient temperature during operation: min. | -20 °C |
| Ambient temperature during operation: max. | 60 °C |
| Ambient temperature during storage/transportation: min. | -40 °C |
| Ambient temperature during storage/transportation: max. | 70 °C |
| Air pressure acc. to IEC 60068-2-13: Operation, min. | 795 hPa |
| Air pressure acc. to IEC 60068-2-13: Operation, max. | 1 080 hPa |
| Air pressure acc. to IEC 60068-2-13: Storage/transport, min. | 660 hPa |
| Air pressure acc. to IEC 60068-2-13: Storage/transport, max. | 1 080 hPa |
| Relative humidity: Operation at 25 ℃ without condensation, max. | 95 % |
| Width | 38 mm |
|---|---|
| Height | 62 mm |
| Depth | 21 mm |
| Weight, approx. | 40 g |
|---|
| eClass | 16 27-24-22-92 |
|---|---|
| ETIM | 10 EC002584 |
| IDEA | 4 3552 |
| UNSPSC | 15 32-15-17-03 |
| China RoHS | FM |
|---|
| Net weight | 0.023 kg |
|---|---|
| Country of origin | CN |
| Shipping weight | 0.523 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 01 Nov 2026
No documents are on file for this part yet.
Ask us for the datasheetThe tariff (HS) code on file for 6ES7297-0AX30-0XA0 is 85389091.
The EAN (GTIN) of 6ES7297-0AX30-0XA0 is 6940408101333.
6ES7297-0AX30-0XA0 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
A step-by-step guide to matching PLC output type, coil voltage and current, contact rating, and socket style when selecting an interface relay.
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