SITOP SIMATIC Power Supply 24VDC 6EP1961-2BA21

SIMATIC SITOP POWER SUPPLY 6EP1961-2BA21 24 V DC

I. Product Description:

The SIMATIC 6EP1961-2BA21 is a 4-channel selective module from the SITOP PSE200U series. It is not a power supply, but rather an intelligent power distribution and protection module designed to distribute 24 V DC to four branches and provide each branch with independent, adjustable overload and short-circuit protection

This is its core function. Through adjustable trip thresholds and time delays, it ensures that only the faulty branch is disconnected, rather than the entire system being shut down.

It supports resetting channels that have been shut down due to a fault via a remote reset input (RST), eliminating the need for on-site intervention.

II. Product Specifications:

SIMATIC 6EP1961-2BA21｜SITOP PSE200U 4x10A Selectivity Module

Maximum Input Current: 40 A;
Output Voltage: Typically input voltage minus approximately 0.2 V;
Number of Outputs: 4;
Rated Output Current: 10 A per channel;
Total Rated Output Current: 40 A;
Adjustable Current Threshold: 3 to 10 A per channel;
Tripping Characteristic: Current limiting;
Output Protection: Electronic overload and short-circuit protection;
Short-Circuit Protection: Supported;
Overload Protection: Supported;
Selectivity Function: Supported;
Output Switching-Off: Individual channel shutdown upon overload or short circuit;
Restart Function: Manual reset and automatic restart functions supported according to configuration;
Settable Delay Time: 0 ms, 25 ms, or 100 ms;
Load-Optimized Switching: Supported;
Common Signaling Contact: Supported;
Signaling Contact: Common fault signaling for the four output channels;
LED Status Indication: Individual output status and fault indication;
Input Connection: +24 V and 0 V screw terminals;
Output Connection: Four individual screw terminals;
Signaling Connection: Screw terminals;
Remote Reset: Supported;
Remote Reset Input: Supported;
Efficiency: Approximately 99%;
Voltage Drop: Approximately 0.2 V;
Power Loss: Low power dissipation due to electronic switching;
Parallel Operation: Supported through common 24 V DC power supply;
Galvanic Isolation: Not provided between input and outputs;
Protection Rating: IP20;
Mounting: 35 mm DIN rail mounting according to EN 60715;
Housing Dimensions (W × H × D): Approximately 72 × 80 × 72 mm;
Required Installation Height: Approximately 180 mm;
Required Clearance Above: Approximately 50 mm;
Required Clearance Below: Approximately 50 mm;
Operating Temperature: 0 to 60 °C;
Storage / Transport Temperature: -40 to 85 °C;
Connection Technology: Screw terminals;
Product Status: Active Product;
Product Family Application: Electronic load distribution and selective protection of 24 V DC loads;
Typical Applications: PLC power distribution, SIMATIC automation systems, industrial control circuits, sensors, actuators, relays, contactors, valves, distributed I/O systems, machine automation, process automation, and 24 V DC control cabinet power distribution

III. Technical Parameters:

SITOP PSE200U 10 A selectivity module 4-channel input: 24 V DC/40 A output: 24 V DC/4x 10 A threshold adjustable 3-10 A with common signaling contact

IV. Industries Served:

The SIMATIC 6EP1961-2BA21 is primarily designed for industrial applications that demand extremely high power supply continuity.

Production lines consist of a large number of devices, such as PLCs, sensors, and actuators. If a failure at a single point causes a power outage across the entire line, it can result in significant production losses. This module ensures that a failure at a single workstation does not affect the entire production line.

In automated sorting lines and warehousing systems, it is used to provide reliable power distribution and fault isolation for distributed motors, barcode readers, and conveyor control units.

These industries are extremely sensitive to disruptions in the production environment and require highly reliable power supply systems to ensure the continuous operation of precision equipment.

V. Customer Case Studies:

Customer Industry: Automated Manufacturing Plants

Products Purchased: SIMATIC ET 200SP Series, SIMATIC S7-1200 Series, SIMATIC S7-1500 Series,

Contract Value: 800,000+

1,Addressing the pain points of cross-border transactions for clients in Belarus, we leveraged the localized payment channels and practical experience we’ve accumulated over many years of deep engagement in the Russian-speaking region. This enabled us to successfully overcome the limitations of conventional cross-border payment channels, efficiently complete the entire closed-loop payment process, and ensure the smooth execution of this transaction.

2,Previously, this client had been unable to source products directly from the Chinese market due to cross-border settlement obstacles. During this collaboration, the client not only highly commended the genuine quality and supply efficiency of the SIMATIC industrial automation products delivered but also, based on the smooth collaboration and mutual trust between both parties, formally signed a long-term strategic cooperation agreement, laying a solid foundation for continued, stable bulk procurement in the future.

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