Brand:Siemens Item No.: 6AG1961-3BA21-7AX0 Product Origin: Germany Product Dimensions:12.5 × 7.0 × 12.0 cm Product Weight:0.482 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 6AG1961-3BA21-7AX0 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 a 24–28.8 V DC input range and a rated output current of up to 40 A. It provides green and red LED indication for input-voltage status and an isolated changeover relay contact for remote monitoring. The SIPLUS configuration incorporates conformal coating and supports an extended operating temperature range of approximately -40 °C to +70 °C.
Technical Specifications
Parameter
Specification
Brand
Siemens
Part Number
6AG1961-3BA21-7AX0
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
Input voltage − approx. 0.5 V
Rated Output Current
40 A
Redundant Power Supplies
2 × SITOP power supplies, max. 20 A each
Maximum Aggregate Current
40 A
Efficiency
Approx. 96.6%
Typical Power Loss at Rated Output
Approx. 34 W
Status Indication
Green/red LED
Relay Signaling
Isolated changeover contact
Relay Contact Rating
8 A / 240 V AC, 24 V DC
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. -40 °C to +70 °C
Dimensions (L × W × H)
12.5 × 7.0 × 12.0 cm
Net Weight
Approx. 0.482 kg
Recommended Companion Models
Model
Product Name
6EP1961-3BA21
Siemens SITOP PSE202U 24 V DC / 40 A Redundancy Module
6AG1961-3BA21-4AX0
Siemens SIPLUS PS E202U Redundancy Module, 0 °C to +60 °C
6AG1436-3BA10-7AA0
Siemens SIPLUS PS 24 V DC / 20 A Power Supply
6AG1437-3BA10-7AA0
Siemens SIPLUS PS 24 V DC / 40 A Power Supply
Frequently Selected Alternatives
Model
Product Name
6EP1961-3BA21
Siemens SITOP PSE202U Redundancy Module
6AG1961-3BA21-4AX0
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 for industrial automation and control applications.
• Supports two power-supply inputs with a maximum output current of 20 A per supply and a combined output current of up to 40 A.
• Suitable for control cabinets and industrial environments requiring reliable 24 V DC power continuity across an extended temperature range.
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 rated up to 20 A each.
• Provides green and red LED status indication for monitoring the two input voltages.
• Includes an isolated changeover relay contact for remote monitoring of redundancy status.
• Features conformal coating and an extended operating temperature range of approximately -40 °C to +70 °C.
Technical FAQs
1. What is Siemens 6AG1961-3BA21-7AX0?
6AG1961-3BA21-7AX0 is a SIPLUS PS E202U redundancy module based on the Siemens 6EP1961-3BA21.
2. What is the main function of this redundancy module?
The module decouples two SITOP power supplies so that the two supplies can operate as a redundant 24 V DC power source.
3. What is the rated output current?
The module has a rated output current of 40 A, with a maximum aggregate output current of 40 A.
4. What power supplies can be connected to the module?
It is designed to decouple two SITOP power supplies with a maximum output current of 20 A from each supply.
5. What input voltage range does the module support?
The specified input voltage range is 24 to 28.8 V DC.
6. What is the output voltage of the module?
The rated output voltage is 24 V DC, with the actual output approximately equal to the input voltage minus 0.5 V.
7. How is the operating status displayed?
A green LED indicates that both input voltages are above the configured switching threshold, while a red LED indicates that at least one input voltage is below the threshold.
8. Does the module provide remote status signaling?
Yes. An isolated changeover relay contact provides a status signal when both input voltages are above the configured switching threshold, which can be set between approximately 20 and 25 V.
9. What makes the -7AX0 version suitable for demanding environments?
The module uses conformal coating and is specified for an operating temperature range of approximately -40 °C to +70 °C, making it suitable for extended-temperature industrial applications.
10. What should be verified before ordering this module?
The connected SITOP power-supply models, individual supply ratings, required redundancy configuration, operating temperature, mounting arrangement, and applicable Siemens documentation should be verified before ordering.
