Siemens 6ES7297-0AX30-0XA0 Battery Board

This battery board provides long-term buffering for the real-time clock in SIMATIC S7-1200 PLC systems. It plugs directly into the signal board receptacle of the S7-12XX CPU (firmware version 3.0 or higher). The board ensures uninterrupted timekeeping during power outages or controller shutdowns.

RTC Buffering and Maintenance Features

The Siemens 6ES7297-0AX30-0XA0 uses a CR1025 button cell to maintain the real-time clock for extended periods . The board’s high-performance capacitor provides reliable operation and supports easy battery replacement. A maintenance LED (MAINT) on the PLC signals when the battery requires replacement . This feature simplifies preventative maintenance and avoids unexpected clock failures. The board does not include the battery in the delivery scope; users must source a CR1025 cell separately .

Technical Specifications

Specification	Detail
Model	6ES7297-0AX30-0XA0
Product Type	Battery Board (BB 1297)
System Compatibility	SIMATIC S7-1200 (FW 3.0 or higher)
Battery Type	CR1025 (not included)
Function	Real-time clock long-term buffering
Alarms/Diagnostics	Yes
Maintenance LED	Yes (MAINT on PLC)
IP Protection	IP20
Width	38 mm
Height	62 mm
Depth	21 mm
Weight	Approx. 40 g
Operating Temperature	-20°C to +60°C
Storage Temperature	-40°C to +70°C
Humidity (25°C, non-condensing)	95% max
Approvals	CE, CSA, FM, RCM, Marine, EAC, CCC

Installation and System Integration

Installation requires only plugging the board into the signal board receptacle inside the S7-1200 CPU. The CPU firmware version 3.0 or higher is mandatory for compatibility . No additional programming or configuration is necessary after installation. The board occupies minimal space due to its compact dimensions. Applications requiring accurate time stamping of process events benefit most from this accessory.