Brand:Siemens Item No.:6AG1961-3BA21-4AX0 Product Origin: Germany Product Dimensions:12.5 × 7.0 × 12.5 cm Product Weight:0.483 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Siemens 6AG1961-3BA21-4AX0 is a SIPLUS PS E202U redundancy module based on the 6EP1961-3BA21. It is designed to decouple two compatible SITOP power supplies and provide a redundant 24 V DC supply path for industrial automation and control systems.
The module supports 24–28.8 V DC input operation and a rated output current of up to 40 A. It includes green and red LED status indication and an isolated relay contact for monitoring the condition of the two input supplies. The SIPLUS version incorporates conformal coating and is specified for operation from approximately 0 °C to +60 °C.
Technical Specifications
Parameter
Specification
Brand
Siemens
Part Number
6AG1961-3BA21-4AX0
Product Type
SIPLUS PS E202U Redundancy Module
Base Standard Part Number
6EP1961-3BA21
Rated Input Voltage
24 V DC
Input Voltage Range
24–28.8 V DC
Rated Output Voltage
24 V DC
Output Voltage
Vin − approx. 0.5 V
Rated Output Current
40 A
Redundant Power Supplies
2 × SITOP power supplies, max. 20 A each
Efficiency
Approx. 96.6%
Status Indication
Green/red LED
Relay Signaling
Isolated changeover contact
Switching Threshold
Approx. 20–25 V
Protection Class
IP20
Mounting
DIN rail EN 60715 35 × 7.5/15
Connection
Screw terminals
Environmental Design
Conformal coating
Operating Temperature
Approx. 0 °C to +60 °C
Dimensions (L × W × H)
Approx. 12.5 × 7.0 × 12.5 cm
Net Weight
Approx. 0.483 kg
Recommended Companion Models
Model
Product Name
6EP1961-3BA21
Siemens SITOP PSE202U 24 V DC / 40 A Redundancy Module
Siemens SITOP PSE202U 24 V DC / 40 A Redundancy Module
6AG1961-3BA21-7AX0
Siemens SIPLUS PS E202U Redundancy Module
6AG1961-3BA01-7AA0
Siemens SIPLUS PS Modular Buffer Module
6AG1931-2FC21-7AA0
Siemens SIPLUS PS DC-UPS 24 V / 40 A Uninterruptible Power Supply Module
Where It Fits in Industrial Applications
• Designed as a SIPLUS PS E202U redundancy module for compatible Siemens SITOP power-supply systems.
• Decouples two 24 V DC SITOP power supplies to create a redundant power architecture and improve supply availability.
• Supports two power-supply inputs with a maximum output current of 20 A per power supply and a combined output current of up to 40 A.
• Suitable for industrial control cabinets and automation systems requiring monitored redundant 24 V DC power.
Key Strengths at a Glance
• Provides 24 V DC redundancy with a rated output current of up to 40 A.
• Supports decoupling of two SITOP power supplies, each rated up to 20 A in the specified configuration.
• Provides LED status indication and an isolated relay contact for monitoring the input-voltage condition.
• Features conformal coating and SIPLUS construction for demanding industrial applications.
Technical FAQs
1. What is Siemens 6AG1961-3BA21-4AX0?
6AG1961-3BA21-4AX0 is a SIPLUS PS E202U redundancy module based on the Siemens 6EP1961-3BA21.
2. What is the main function of the redundancy module?
The module decouples two SITOP power supplies so that a fault or loss of one supply can be isolated while the redundant supply continues supporting the DC load.
3. What is the rated output current?
The module has a rated output current of 40 A, with a maximum aggregate current of 40 A.
4. What input voltage does the module support?
The module is designed for a 24 V DC supply and supports an input voltage range of 24 to 28.8 V DC.
5. What is the maximum power-supply rating for the two inputs?
The module is suitable for decoupling two SITOP power supplies with a maximum output current of 20 A per supply in the specified configuration.
6. What is the output voltage?
At the rated operating point, the output voltage is 24 V DC and is approximately the input voltage minus 0.5 V.
7. How does the module indicate redundancy status?
A green LED indicates that both input voltages are above the switching threshold, while a red LED indicates that at least one input voltage is below the threshold.
8. Does the module provide a remote monitoring signal?
Yes. It provides an isolated changeover relay contact for signaling the condition in which both input voltages are above the configured switching threshold.
9. How is the module installed?
The module is designed to snap onto an EN 60715 35 × 7.5/15 DIN rail and uses screw terminals for electrical connections.
10. What should be verified before ordering this module?
The SITOP power-supply models, individual supply currents, required redundancy arrangement, operating temperature, DIN-rail installation, and applicable Siemens compatibility documentation should be verified before ordering.
