Product Name:Stabilized power supplies Input
Brand Name: SIEMENS
Model Number:6EP1961-3BA21
Country of Origin:GERMANY
Warranty: 12 Months
Whatsapp：+86 18159889985
Email：[email protected]
Brand Name: |
SIEMENS |
Model Number: |
6EP1961-3BA21 |
Country of Origin: |
GERMANY |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
Delivery time in stock |
Payment Terms: |
T/T |
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Sales Manager: |
Stella |
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Send an email: |
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Contact in Whatsapp: |
The 6EP1961-3BA21, a SITOP PSE202U redundancy module from Siemens, ensures uninterrupted 24 V DC power delivery in critical industrial systems. This 6EP1961-3BA21 module decouples two SITOP power supplies, each rated up to 20 A, to provide a combined 40 A output. In the event of a power supply failure, the 6EP1961-3BA21 automatically transfers the load to the healthy unit. Compact and DIN rail‑mountable, the 6EP1961-3BA21 offers diagnostic signaling via LEDs and a relay contact.
Industrial Automation: Redundant power supply for PLCs, HMIs, actuators, and sensors in critical control systems
Process Control: Ensuring continuous 24 V DC supply for distributed control systems (DCS) and field instruments
Manufacturing: Backup power for production line equipment where downtime is not acceptable
Mission‑Critical Systems: High‑availability power for safety systems, emergency shutdown (ESD) controllers, and communication networks
Redundant Configuration: Decouples two SITOP power supplies of the same type for automatic failover
High Output Current: Supports up to 40 A combined output current
Diagnostic Signaling: Green LED for OK status, red LED for fault; isolated relay changeover contact for remote monitoring
Adjustable Switching Threshold: Threshold settable from 20 V to 25 V
High Efficiency: 96.6% efficiency minimizes power loss and heat generation
Compact DIN Rail Mounting: Space‑saving 70 mm wide design for control cabinet installation
Industrial Certifications: UL 508, CE, ABS, DNV, ATEX, IECEx
Wide Temperature Range: Operates from -25 °C to +60 °C
The redundancy module employs diode decoupling in a parallel configuration. Two identical SITOP 24 V power supplies are connected to the module's inputs. The module continuously monitors the output voltage of both supplies against a user‑adjustable switching threshold (20–25 V). When both supplies are operational, the module combines their outputs to deliver up to 40 A to the load. If one supply fails or its output falls below the threshold, the healthy unit automatically assumes the full load. The diode‑based decoupling prevents reverse current from the healthy supply into the faulty unit. Status is indicated by the front‑panel LED (green: both inputs OK; red: at least one input below threshold) and a floating relay contact for remote monitoring.
Q1: What is the maximum output current of the 6EP1961-3BA21?
A1: The 6EP1961-3BA21 supports a combined output current of up to 40 A.
Q2: Can the 6EP1961-3BA21 be used with non‑SITOP power supplies?
A2: The 6EP1961-3BA21 is designed specifically for decoupling two SITOP 24 V power supplies of the same type.
Q3: Does the 6EP1961-3BA21 provide a status signal?
A3: Yes, it features a green LED (OK), a red LED (fault), and an isolated relay changeover contact for remote signaling.
Q4: What is the operating temperature range of the 6EP1961-3BA21?
A4: The module operates from -25 °C to +60 °C with natural convection cooling.
Q5: Is the 6EP1961-3BA21 suitable for hazardous locations?
A5: Yes, it holds ATEX (Ex nA nC IIC T4 Gc) and cCSAus (Class I, Div. 2) certifications.
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