SIEMENS 6EP19312EC42 SITOP DC-USV Module 24V/6A Ultracapacitor UPS

Unlike conventional battery-based UPS systems that demand periodic battery replacement and suffer from limited cycle life, the Siemens 6EP19312EC42 SITOP DC-USV module stores energy in maintenance-free ultracapacitors. This design delivers instant backup power for 24 V DC industrial loads, with a recharge time of just 60 seconds to 90% capacity and an operating temperature range from -25 °C to +70 °C. It is an offline UPS that seamlessly bridges brief power interruptions, protecting PLCs, HMIs, and other critical automation components from voltage dips and micro-outages.

Highlights

• Ultracapacitor energy storage: 2.5 kJ, no batteries to replace, virtually unlimited charge/discharge cycles
• Fast backup: up to 10 minutes at 100 W load, 2 minutes at 300 W
• Rapid recharge: reaches 90% capacity in approximately 60 seconds
• Wide temperature tolerance: -25 °C to +70 °C for demanding industrial environments
• Compact DIN rail mounting with IP20 protection
• Clear LED status indicators and floating relay contacts for remote monitoring

In daily use

The SITOP DC-USV module connects in series between the 24 V DC power supply and the load. During normal operation, it passes through the input voltage with an efficiency greater than 97%. When the input voltage drops below the threshold, the module instantly switches to backup mode, drawing energy from its ultracapacitors to maintain a regulated 24 V DC output. The integrated relay contacts signal 'Ready', 'Battery mode', and 'Battery low' states, enabling seamless integration into plant monitoring systems.

Full specifications

• Input voltage: 24 V DC (range 22.8–28.8 V DC)
• Output voltage: 24 V DC regulated
• Output current: 6 A nominal
• Output power: 144 W nominal
• Energy storage: ultracapacitors, 2.5 kJ, maintenance-free
• Backup time: up to 10 min at 100 W, 2 min at 300 W
• Charging time: approx. 60 s to 90% capacity
• Operating temperature: -25 °C to +70 °C
• Protection class: IP20
• Mounting: DIN rail
• Efficiency: >97%
• Input current max: 6.5 A, recommended external fuse 10 A
• Signaling: floating relay contacts (Ready, Battery mode, Battery low), LED indicators
• Parallel operation: yes, for increased backup time
• Approvals: CE, cULus, ATEX, IECEx, GL, DNV, RINA, ABS, LR, BV

Final note

With ultracapacitor technology, the SITOP DC-USV module eliminates battery maintenance and ensures reliable backup for critical automation systems in harsh environments.