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- Part number
- 6EP1961-3BA21
- Model no
- PSE202U
In stock · 11
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· From Türkiye
0
- CE
- EAC
Siemens 6EP1961-3BA21 SITOP PSE202U 24V/40A Redundancy Module
Siemens SITOP PSE202U redundancy module, 24V DC/40A, decouples two SITOP supplies, 96.6% efficiency, IP20, DIN rail.
Description
About the PSE202U
About the PSE202U
The Siemens 6EP1961-3BA21 is a SITOP PSE202U redundancy module that decouples two 24 V DC SITOP power supplies, each contributing up to 20 A, to a combined 40 A output. It signals status through relay contacts and front LEDs, reaches 96.6% efficiency, and mounts on a 35 mm DIN rail in an IP20 enclosure measuring 70 x 125 x 120 mm.
Certifications & Standards
- CE
- EAC
- ABS
- DNV
Selection Notes
This redundancy module accepts two independent 24 V DC feeds and isolates them from each other so a fault or maintenance shutdown on one supply does not pull down the other - pair it with two SITOP power supplies each sized to carry the full 40 A load alone for true N+1 redundancy, not two units each rated for half the load. The isolated relay contact reports loss of either input below the 20-25 V adjustable threshold, giving a hard-wired signal for a PLC or alarm panel independent of any fieldbus. At 96.6% efficiency and a 6.47 million hour MTBF at 40 °C, the module itself is not the weak point in a redundant supply chain.
Applications
Used to combine two SITOP 24 V DC power supplies into a redundant 40 A DC bus for PLC racks, remote I/O, and other loads where a single power-supply failure must not interrupt control power.
Specification
Full specification
General information 3
| product brand name | SITOP |
|---|---|
| product type designation | PSE202U |
| product designation | Redundancy module |
Input 4
| type of the power supply network | DC voltage |
|---|---|
| voltage curve at input | DC |
| supply voltage at DC | 24 V |
| input voltage at DC | 24 ... 28.8 V |
Output 11
| voltage curve at output | Controlled, isolated DC voltage |
|---|---|
| product function output voltage controlled | Yes |
| output voltage at DC rated value | 24 V |
| formula for output voltage | Vin - approx. 0.5 V |
| output voltage: at output 1 at DC rated value | 24 V |
| output voltage: at output 1 at DC | 24 V |
| output voltage adjustable | No |
| display version for normal operation | Green LED for "both Input voltages > switching threshold"; red LED: for "at least one input voltage < switching threshold" |
| type of signal at output | Isolated relay contact (changeover contacts, rating 8 A/240 V AC, 24 V DC): Signals OK if both input voltages > switching threshold, setting range of threshold 20 ... 25 V |
| output current: rated value | 40 A |
| output current: rated range | 40 A; max. aggregate current 40 A; +60 ... +70 °C: derating 3%/K |
Show all 85 specifications ↓ Show less ↑67 more values in Identification, Efficiency, Safety, EMC, Standards, specifications, approvals, Standards, specifications, approvals hazardous environments, Standards, specifications, approvals marine classification, Standards, specifications, approvals Environmental Product Declaration, Ambient conditions, Connection method, Mechanical data, Version Classification, Logistics.
Identification 10
| Part number | 6EP1961-3BA21 |
|---|---|
| Type designation | PSE202U |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4025515152675 |
| ETIM class | EC002540 |
| eCl@ss | 27040701 |
Efficiency 3
| efficiency in percent | 96.6 % |
|---|---|
| power loss [W]: at rated output voltage for rated value of the output current typical | 34 W |
| power loss [W]: during no-load operation maximum | 1.5 W |
Safety 4
| galvanic isolation between input and output | No |
|---|---|
| galvanic isolation | relay contact: SELV, ES1 (IEC 62368-1), DVC As (IEC 61204-7) |
| operating resource protection class | Class III |
| protection class IP | IP20 |
EMC 2
| standard: for emitted interference | EN 55022 Class B |
|---|---|
| standard: for interference immunity | EN 61000-6-2 |
Standards, specifications, approvals 6
| certificate of suitability: CE marking | Yes |
|---|---|
| certificate of suitability: UL approval | Yes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259 |
| certificate of suitability: EAC approval | Yes |
| certificate of suitability: NEC Class 2 | No |
| type of certification: CB-certificate | No |
| MTBF at 40 °C | 6 471 654 h |
Standards, specifications, approvals hazardous environments 4
| certificate of suitability: IECEx | No |
|---|---|
| certificate of suitability: ATEX | No |
| certificate of suitability: ULhazloc approval | No |
| certificate of suitability: FM registration | No |
Standards, specifications, approvals marine classification 5
| shipbuilding approval | Yes |
|---|---|
| Marine classification association: American Bureau of Shipping Europe Ltd. (ABS) | Yes |
| Marine classification association: French marine classification society (BV) | No |
| Marine classification association: Det Norske Veritas (DNV) | Yes |
| Marine classification association: Lloyds Register of Shipping (LRS) | No |
Standards, specifications, approvals Environmental Product Declaration 5
| Environmental Product Declaration | Yes |
|---|---|
| global warming potential [CO2 eq]: total | 954.1 kg |
| global warming potential [CO2 eq]: during manufacturing | 21.8 kg |
| global warming potential [CO2 eq]: during operation | 931.6 kg |
| global warming potential [CO2 eq]: after end of life | 0.51 kg |
Ambient conditions 4
| ambient temperature: during operation | -25 ... +60 °C; with natural convection |
|---|---|
| ambient temperature: during transport | -40 ... +85 °C |
| ambient temperature: during storage | -40 ... +85 °C |
| environmental category according to IEC 60721 | Climate class 3K3, 5 ... 95% no condensation |
Connection method 3
| type of electrical connection | screw terminal |
|---|---|
| at input | Input, output and ground: 1 screw terminal each for 0.33 ... 10 mm2 single- core/finely stranded |
| for auxiliary contacts | Relay contact: 3 screw terminals for 0.5 ... 2.5 mm2 single-core/finely stranded |
Mechanical data 11
| width × height × depth of the enclosure | 70 × 125 × 120 mm |
|---|---|
| installation width × mounting height | 70 mm × 225 mm |
| required spacing: top | 50 mm |
| required spacing: bottom | 50 mm |
| required spacing: left | 0 mm |
| required spacing: right | 0 mm |
| fastening method | Snaps onto DIN rail EN 60715 35x7.5/15 |
| DIN-rail mounting | Yes |
| S7 rail mounting | No |
| wall mounting | No |
| housing can be lined up | Yes |
Version Classification 4
| eClass | 16 27-04-07-01 |
|---|---|
| ETIM | 10 EC002540 |
| IDEA | 4 4130 |
| UNSPSC | 15 39-12-10-04 |
Logistics 6
| Net weight | 0.4 kg |
|---|---|
| Country of origin | Romania |
| Shipping weight | 0.9 kg |
| Ships from | Türkiye |
| Dispatch | 13 Nov |
| Stock | In stock |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
Documents for 6EP1961-3BA21
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Ask us for the datasheet
Certifications
Certifications and standards
- CE
- EAC
- CE marking
- EAC approval
- shipbuilding approval
- American Bureau of Shipping Europe Ltd. (ABS)
- Det Norske Veritas (DNV)
- Environmental Product Declaration
Quick answers
Questions about the PSE202U
What is the rated current of PSE202U?
The rated current of PSE202U is 40 A.
What motor power is PSE202U rated for?
The rated motor power of PSE202U is 34 W kW.
What is the HS code of PSE202U for customs?
The tariff (HS) code on file for PSE202U is 85049090.
What is the EAN of PSE202U?
The EAN (GTIN) of PSE202U is 4025515152675.
Where does PSE202U ship from, and how fast?
PSE202U ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
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Series
Siemens SITOP PSE202U
- Brand
- Siemens
- Series
- SITOP PSE202U
