6EP1935-6MF01 SITOP Battery Module Siemens

Product Introduction

The 6EP1935-6MF01 SITOP Battery Module is a reliable energy storage solution from Siemens, purpose-built for DC UPS systems. This module pairs seamlessly with SITOP UPS units rated at 6A, 15A, and 40A, providing 24V DC backup power during mains failures. Furthermore, it utilizes maintenance-free sealed lead-acid batteries, eliminating the need for regular electrolyte checks. This design significantly reduces maintenance efforts while ensuring consistent performance. Additionally, the module includes comprehensive safety features, such as a 20A blade-type fuse and valve-controlled overload protection. Consequently, it safeguards both the battery and connected loads from electrical faults. For engineers seeking a durable backup power source, this module offers a perfect balance of capacity, safety, and ease of use.

Technical Specifications

Charging Parameters and Temperature Compensation

The 6EP1935-6MF01 requires specific end-of-charge voltages depending on the ambient temperature to maximize battery life. At 10°C, the recommended voltage is 27.8 V; at 20°C, it drops to 27.3 V; at 30°C, it is 26.8 V; at 40°C, it is 26.6 V; and at 50°C, it is 26.3 V. Moreover, the permissible charging current is limited to a maximum of 3 A. This temperature-dependent voltage adjustment prevents overcharging and thermal runaway, thereby extending the battery's usable lifespan. Meanwhile, the module automatically adapts to the connected SITOP UPS unit's charging profile.

Battery Service Life and Capacity Retention

Service life varies significantly with operating temperature. At 20°C, the battery typically lasts 4 years before its capacity drops to 50% of the original value. At 30°C, the service life decreases to 2 years; at 40°C, it is 1 year; and at 50°C, it is only 0.5 years. Additionally, the battery experiences a typical self-discharge rate of 3% per month at 20°C. Therefore, storing the module in a cool environment (0°C to 20°C) and keeping it fully charged are critical for preserving its capacity. These guidelines help users plan maintenance intervals effectively.

Safety and Approvals

Protection Features

The 6EP1935-6MF01 incorporates multiple safety mechanisms. A 20 A/32 V blade-type fuse protects against short circuits, while valve-controlled design prevents gas accumulation and pressure build-up. Furthermore, the module carries a CE mark and holds cURus recognition (UL 1778, CSA C22.2 No. 107.1), ensuring compliance with North American safety standards. Its protection class is III, indicating operation at safety extra-low voltage (SELV). Besides, the unit meets IP00 degree of protection per EN 60529, suitable for installation within control cabinets.

Operational Safety Notes

Users must adhere to relevant DIN/VDE regulations (e.g., VDE 0510 Part 2 / EN 50272-2) for lead-acid battery handling. Specifically, ensure the battery site has adequate ventilation to prevent hydrogen accumulation. Additionally, maintain a minimum distance of 50 cm between the battery and any potential ignition sources. Following these precautions minimizes explosion risks and ensures safe operation throughout the module's service life.

Mechanical Specifications and Installation

Dimensions and Mounting

The 6EP1935-6MF01 measures 253 mm in width, 168 mm in height, and 121 mm in depth. For installation, it requires a mounting space of 273 mm width and 188 mm height. The enclosure design supports screw mounting onto flat surfaces, with keyhole slots for easy hooking onto M4 screws. Weighing approximately 9 kg, the module is sturdy yet manageable for cabinet integration. Its spring-loaded terminals accommodate wire sizes from 0.08 mm² to 4 mm², ensuring secure and tool-friendly connections for both +BATT and -BATT leads.

Connection Technology

The module uses spring-loaded terminals for reliable and vibration-resistant electrical connections. This terminal type simplifies wiring because it does not require screw tightening—just insert the stripped wire and release. Additionally, the package includes an accessories pack with solid-state circuitry fuses rated at 20A and 30A, offering flexibility for different UPS configurations.

Packaging List

When ordering the 6EP1935-6MF01, the package contains:

• SITOP Battery Module 24V/12Ah (1 unit)

• Accessories pack with 20A and 30A solid-state fuses (1 set)

• Quick-start installation guide (1 copy)

Please note that the package excludes mounting screws, cables, and the DC UPS module itself. For delivery, we partner with Fedex, UPS, and DHL to ensure your shipment arrives safely and on time.

Frequently Asked Questions (FAQ)

1. Can I use the 6EP1935-6MF01 with non-Siemens UPS systems?
While technically possible, this battery module is optimized for SITOP DC UPS units (6A, 15A, 40A). The charging voltage and current profiles are tailored to Siemens' specifications. Using it with third-party UPS systems may result in suboptimal charging or reduced battery life.

2. How do I know when to replace the battery?
Monitor the UPS module's diagnostic indicators. When the battery capacity falls below 50% of its original rating (typically after 4 years at 20°C), the UPS will signal a "battery weak" alarm. Regular capacity tests every 6 months help determine the replacement timing.

3. Is this battery module recyclable?
Yes, lead-acid batteries are highly recyclable. Return the spent module to Siemens' recycling program or to a certified local battery recycler. Do not dispose of it in regular waste, as this violates environmental regulations.

4. What happens if I operate the module above 50°C?
Exceeding the maximum operating temperature of 50°C accelerates aging and may trigger thermal shutdown. The battery's service life halves with every 10°C increase above 20°C. For instance, at 50°C, the service life drops to just 0.5 years. Always ensure proper cabinet ventilation.

5. Does the module support parallel connection for higher capacity?
No, parallel connection of multiple battery modules is not recommended. Different internal resistances and charge states can cause circulating currents, which may damage both batteries. Instead, use a single module with adequate capacity or consult Siemens for custom solutions.