Technical Specifications
| Parameter Name | Value |
|---|---|
| Product Model | 6EP1933-2EC41 |
| Manufacturer | Siemens |
| Series | SITOP UPS500S |
| Product Type | DC UPS Basic Unit (Capacitor-based) |
| Energy Storage | 2.5 kWs (Capacitor) |
| Input Voltage | 24 VDC (22 – 29 VDC range) |
| Output Voltage | 24 VDC (24 – 24.7 V in buffer mode) |
| Output Current (Rated) | 15 A |
| Peak Current | 25 A |
| Buffering Time (15 A load) | 3 seconds (basic unit) |
| Buffering Time (5 A load) | 15 seconds (basic unit) |
| Efficiency (Typical) | 97.5% |
| Power Loss (Typical) | 9 W |
| Response Threshold (Adjustable) | 22.0 – 25.5 VDC (0.5 V steps) |
| Charging Current (Selectable) | 1 A or 2 A |
| Interface | USB (for monitoring and control) |
| Signaling | LEDs: OK (green), BAT (yellow), ALARM (red), BAT>85% (green); Floating relay contacts |
| Mounting | DIN rail (35 mm) |
| Dimensions (W×H×D) | 120 × 125 × 125 mm |
| Weight | Approx. 1.0 kg |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +70 °C |
| Degree of Protection | IP20 |
| MTBF (at 40 °C) | 638,570 hours |
| Approvals | CE, cULus, ATEX, ABS, DNV GL, EAC |
| Standards | EN 55022 Class B, EN 61000-6-2 |
Main Features and Advantages
Maintenance-Free Capacitor Technology: The SIEMENS 6EP1933-2EC41 represents a paradigm shift in industrial UPS design by utilizing high-performance capacitors instead of traditional batteries. This innovative approach eliminates the need for periodic battery replacement, significantly reducing lifecycle maintenance costs and system downtime. The capacitors used in the SIEMENS 6EP1933-2EC41 have an exceptionally long service life, retaining over 80% of their capacity even after 8 years of operation at 50 °C ambient temperature . Unlike lead-acid or lithium batteries, capacitors do not emit gases during operation, meaning the SIEMENS 6EP1933-2EC41 does not require cabinet ventilation in compliance with VDE 0510 Part 2 / EN 50272-2. This feature enables more compact control cabinet designs and reduces installation complexity.
Seamless Buffering and Rapid Response: The SIEMENS 6EP1933-2EC41 provides instantaneous protection against power disturbances with zero transfer time. When the input voltage drops below the preset threshold, the device immediately begins supplying power from its internal capacitors, ensuring connected loads experience no interruption. The buffering time can be extended by connecting up to three SITOP UPS501S expansion modules in parallel, providing scalable backup duration for applications requiring longer protection periods . The SIEMENS 6EP1933-2EC41 supports flexible buffering time configuration via DIP switches, allowing operators to select either fixed-time buffering or maximum available energy utilization based on application requirements.
Comprehensive Diagnostics and Communication: The SIEMENS 6EP1933-2EC41 features a sophisticated status indication system that enables proactive system monitoring and rapid fault diagnosis. Four LED indicators provide at-a-glance status information: green “OK” for normal operation, yellow “BAT” for buffer mode, red “ALARM” for fault conditions, and a dedicated LED indicating energy storage level above 85% . Three floating relay contacts deliver remote status signals for seamless integration into plant monitoring systems. The integrated USB interface allows connection to a PC for detailed diagnostics and control using the free SITOP DC UPS Software tool, enabling remote management of buffering time, shutdown commands, and data logging . This connectivity makes the SIEMENS 6EP1933-2EC41 an intelligent and manageable component of any modern automation network.
Robust Design and Reliability: Engineered for the demanding conditions of industrial environments, the SIEMENS 6EP1933-2EC41 delivers exceptional operational reliability. With a mean time between failures (MTBF) exceeding 638,000 hours at 40 °C, the module provides long-term dependable service . Its wide operating temperature range from 0 °C to +60 °C ensures stable performance in various industrial settings. The device complies with stringent international standards including ATEX certification for hazardous area installations, cULus listing for North American markets, and marine classification approvals from ABS and DNV GL , making the SIEMENS 6EP1933-2EC41 suitable for use in oil and gas, marine, and other demanding
