In the event of CPU shutdown, the real-time clock of the S7-1200 CPU is supplied with power by means of a high-performance capacitor. The capacitance of the capacitor determines the power reserve for the real-time clock. The use of the battery board extends the power reserve by up to one year.
Siemens Accessories S7-1200 Product Specifications:
| Article number |
6ES7297-0AX30-0XA0 |
|
Battery Board BB 1297 f. CPU 12xx |
| General information |
|
| Product type designation |
BB 1297 |
| Interrupts/diagnostics/status information |
|
| 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. |
| Degree and class of protection |
|
| IP degree of protection |
IP20 |
| Standards, approvals, certificates |
|
| CE mark |
Yes |
| CSA approval |
Yes |
| FM approval |
Yes |
| RCM (formerly C-TICK) |
Yes |
| Marine approval |
Yes |
| Ambient conditions |
|
| Free fall |
|
| ● Fall height, max. |
0.3 m; five times, in product package |
| Ambient temperature during operation |
|
| ● min. |
-20 °C |
| ● max. |
60 °C |
| Ambient temperature during storage/transportation |
|
| ● min. |
-40 °C |
| ● max. |
70 °C |
| Air pressure acc. to IEC 60068-2-13 |
|
| ● Operation, min. |
795 hPa |
| ● Operation, max. |
1 080 hPa |
| ● Storage/transport, min. |
660 hPa |
| ● Storage/transport, max. |
1 080 hPa |
| Relative humidity |
|
| ● Operation at 25 ℃ without condensation, max. |
95 % |
| Mechanics/material |
|
| Enclosure material (front) |
|
| ● Plastic |
Yes |
| Dimensions |
|
| Width |
38 mm |
| Height |
62 mm |
| Depth |
21 mm |
| Weights |
|
| Weight, approx. |
40 g |
