Siemens 6EP1931-2DC21

Brand: Siemens
Model: 6EP1931-2DC21

Inventory situation: Goods are available in stock.

Product features

The premium SITOP DC UPS module Siemens 6EP1931-2DC21 was created especially for automation and industrial applications. This DC UPS module, a dependable product from Siemens, a pioneer in industrial technology, provides dependable backup power to keep vital devices operating during brief power outages. It provides a steady 24V DC output with a rated output current of 6A and an output power of 144W, making it ideal for powering PLCs, HMIs, sensors, and other crucial industrial equipment. It operates with a 24V DC rated input voltage (ranging from 22V DC to 29V DC).

The Siemens 6EP1931-2DC21's small size-just 50 mm wide-makes it simple to install on standard DIN rails and doesn't take up much room in control cabinets, which is one of its main advantages. This plug-and-play module can be quickly set up for immediate use because it doesn't require complicated configuration. It ensures effective battery maintenance with an adjustable charging current (0.2A or 0.4A) and a fixed charging termination voltage of 26.3V DC. It operates with external batteries (Siemens SITOP battery modules are advised).

The Siemens 6EP1931-2DC21 offers superior overvoltage, short circuit, and battery reverse polarity protection for linked devices. In less than 10 milliseconds, it transitions to battery power in the event of a power outage-fast enough to avoid data loss or equipment shutdown. Additionally, users can easily monitor its performance thanks to its clear status indicators for buffer mode, battery charging, normal operation, and fault alerts.

Specifications

Model	6EP1931-2DC21
Rated Input Voltage	24 V DC
Product Type	SITOP DC UPS module
Input Voltage Range	22 V DC ~ 29 V DC
Rated Input Current	6.85 A (full load + charging)
Rated Output Voltage	24 V DC
Rated Output Current	6 A
Dimensions (W × H × D)	50 mm × 125 mm × 125 mm

Precautions

To guarantee safe operation, a long service life, and dependable backup power for your industrial equipment, you must take important precautions when using the Siemens 6EP1931-2DC21 SITOP DC UPS module. This module needs a 24V DC rated input (ranging from 22V DC to 29V DC), so always check the input voltage before installing. The Siemens 6EP1931-2DC21 and any connected devices, such as PLCs, HMIs, and industrial sensors, could be harmed by connecting it to a voltage outside of this range.

For best results, use only external batteries that are compatible with the Siemens 6EP1931-2DC21. Siemens SITOP battery modules are strongly advised. Even though the module has reverse polarity protection, incorrect wiring can still result in malfunctions or shorten battery life, so make sure the battery is connected correctly. To prevent overcharging, which can damage the battery and the Siemens 6EP1931-2DC21, set the charging current to either 0.2A or 0.4A according to the specifications of your battery.

Maintain adequate ventilation in the control cabinet and install the Siemens 6EP1931-2DC21 strictly on a standard DIN rail as intended. Its IP20 protection rating only protects against solid objects larger than 12mm, so keep it out of places with high moisture (relative humidity over 95% with condensation), extreme temperatures above -25°C to +60°C, or direct dust exposure. The module's short power outage backup capability (switching time <10ms) may be impacted by these severe conditions, which can also deteriorate internal components.

FAQ

Q: What is the Siemens 6EP1931-2DC21, and what is its primary function?

A: A 24V DC UPS module made for DIN rail installation is the Siemens 6EP1931-2DC21. Its main purpose is to supply critical loads, like PLCs, sensors, and HMIs, with continuous DC power in the event that the main power supply fails. It guarantees that operations can safely continue or end, avoiding data loss and equipment damage.

Q: Which battery module is compatible with the 6EP1931-2DC21?

A: For the 6EP1931-2DC21 to function, an external SITOP battery module is needed. The 6EP1935-6MD31 is a frequently linked model. For safe and effective operation, it is essential to use a battery module that Siemens recommends and set up the DIP switches in accordance with its specifications.

Q: Where can I find the manual for the 6EP1931-2DC21?

A: The official manual for Siemens SITOP DC-UPS modules is best obtained directly from Siemens' official support website. This ensures you have the most accurate and up-to-date technical, installation, and safety information. The product series including the 6EP1931-2EC21 has manuals available on document sharing platforms, but for guaranteed accuracy, the official source is recommended .