Reviews & Ratings
? Product Overview
The 6EP1931‑2EC21 is a DIN‑rail mounted
SITOP DC UPS module designed to provide uninterruptible 24 V DC power with up to 15 A continuous output. Ideal for
industrial automation systems where power continuity is critical
⚙️ Key Specs
|
Feature |
Description |
|
Input
Voltage |
22–29 V DC (nominal 24 V DC) |
|
Output
Voltage |
Maintains
~24 V
DC (no-load mode: ~Vin−0.5 V)
|
|
Output
Current |
15 A continuous (max peak ~15.7 A) (~360 W) |
|
Efficiency |
~96.2 % on mains, ~96 % on battery |
|
Power
Loss |
~14 W (mains) / ~15 W (battery) |
|
Start-Up
Delay |
~1 s startup, 60 ms output ramp-up |
|
Battery
Support |
Works
with SITOP battery modules (charging currents: 0.35 A or 0.7 A) |
|
Protection
& Monitoring |
Reverse
polarity protection, status LEDs, wet contacts ("Bat/OK", alarm),
and "Bat >85 %"
indicator |
|
Certifications |
CE,
UL/cUL, EN 55022
Class B,
EN 61000‑6‑2
|
|
Operating
Temp. |
–25 °C to +60 °C; Storage –40 °C to +85 °C |
|
Connections |
Screw
terminals, IP20 enclosure |
|
Dimensions
& Weight |
~50 mm × 125 mm × 125 mm, ≈0.4 kg |
?️ Functionality
- In
normal operation, it passes mains 24 V
DC directly to loads.
- If
input drops below ~22.5 V
(adjustable), it switches to battery backup seamlessly, typically within
~1 s
- DIP
switches allow customization of battery cutoff, charge rates, and
end-of-charge voltage.
?️ Typical Application
Suited for industrial process
automation, machine control, factory systems, or any critical 24 V devices requiring uninterrupted power
during mains disruptions.
? Lifecycle & Availability
- Active
product, though scheduled for phase-out
effective October 1, 2025
- Available
globally in stock via Siemens and authorized distributors.
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