Siemens 6EW1000-7AA S5 Lithium Backup Battery for SIMATIC S5 PLC

In industrial automation environments, maintaining program memory during power interruptions is critical. The Siemens 6EW1000-7AA lithium battery provides reliable backup power for SIMATIC S5 PLCs, ensuring data retention and uninterrupted operation in manufacturing plants, process control systems, and machinery. This original Siemens battery is engineered for long-term stability and is a direct replacement for the S5 series.

Key specifications

• Battery type: Lithium Thionyl Chloride (Li-SOCl2)
• Nominal voltage: 3.6 V
• Nominal capacity: 2.4 Ah (2400 mAh)
• Form factor: Cylindrical (similar to AA size)
• Connector: 2-pin with wire leads
• Compatible with Siemens SIMATIC S5 series (S5-90U, S5-95U, S5-100U, S5-115U, S5-135U, S5-155U)
• Operating temperature: -55°C to +85°C
• Self-discharge rate: less than 1% per year
• Shelf life: up to 10 years
• Application: Memory backup for PLC systems

Why choose it

This battery is manufactured to Siemens' exact specifications, guaranteeing perfect fit and function. Its lithium thionyl chloride chemistry offers an exceptionally low self-discharge rate, meaning the battery retains its charge for years even when not in use. The wide operating temperature range makes it suitable for harsh industrial environments, from cold storage facilities to hot manufacturing floors. With a shelf life of up to 10 years, you can stock spares without worry.

Ideal use cases

• Replacing a depleted battery in existing SIMATIC S5 PLC installations
• Preventive maintenance to avoid unexpected downtime
• Stocking as a spare part for critical automation systems
• Ensuring data retention during power outages in industrial settings

Good to know

The battery is a primary lithium cell and should not be recharged. Always dispose of used batteries according to local regulations. For optimal performance, replace the battery before its expiration date, even if the PLC is not in use.