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Datasheet generated 2026-10-07
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Siemens SITOP DC power supply 6EP1961-2BA11

Siemens · Control & Automation · Power Supplies · Germany · siemens.com
Part Number
6EP1961-2BA11  ·  HS 8536.30
Siemens SITOP DC power supply 6EP1961-2BA11

Siemens 6EP1961-2BA11 — SITOP DC power supply. DIN-rail primary-switched regulated 24 VDC power supply for automation panels. SITOP PSE200U 3 A "Selectivity" module for 4 channels, Input: 24 V DC/3 A per trunking outlet, adjustable.

Technical Specifications

Manufacturer part number (MPN)6EP1961-2BA11
EAN / GTIN4025515152651
Sales unitpcs
Type of the power supply networkControlled DC voltage
Supply voltage at DC rated value24 V
Input voltage at DC22 ... 30 V
Overvoltage overload capability35 V
Input current at rated input voltage 24 V rated value12 A
Voltage curve at outputcontrolled DC voltage
Formula for output voltageVin - approx. 0.2 V
Relative overall tolerance of the voltage noteIn accordance with the supplying input voltage
Number of outputs4
Output current up to 60 °C per output rated value3 A
Adjustable current response value current of the current-dependent overload release0.5 ... 3 A
Type of response value settingvia potentiometer
Response delay maximum5 s
Product feature parallel switching of outputsNo
Type of outputs connectionsimultaneous switch-on of all outputs after power-up of the supply voltage > 20 V, delay time of 25 ms, 100 ms, or "load-optimized" via DIP switch configurable for sequential switch-on
Efficiency in percent97 %
Power loss [W] at rated output voltage for rated value of the output current typical9 W
Switching characteristic — of the excess currentIout = 1.0 ...1.5 x set value, switch-off after approx. 5 s
Switching characteristic — of the current limitationIout = 1.5 x set value, switch-off after typ. 100 ms
Switching characteristic — of the immediate switch-offIout > set value and Vin < 20 V, switch-off after approx. 0.5 ms
Residual current at switch-off typical1 mA
Design of the reset device/resetting mechanismvia sensor per output
Remote reset functionnon-isolated 24 V input (signal level "high" at > 15 V)
Fuse protection type at input5 A per output (not accessible)
Display version for normal operationThree-color LED per output: green LED for "Output switched through"; yellow LED for "Output switched off manually"; red LED for "Output switched off due to overcurrent"
Design of the switching contact for signaling functionCommon signal contact (changeover contact, rating 0.1 A/24 V DC)
Galvanic isolation between input and output at switch-offNo
Standard for safetyaccording to EN 62368-1
Operating resource protection classClass III
Protection class IPIP20
Standard — for emitted interferenceEN 55022 Class B
Standard — for interference immunityEN 61000-6-2
Shipbuilding approvalYes
Ambient temperature — during operation-25 ... +60 °C; with natural convection
Ambient temperature — during transport-40 ... +85 °C
Ambient temperature — during storage-40 ... +85 °C
Type of electrical connectionscrew terminal
Connection method — at input+24 V: 2 screw terminals for 0.5 ... 16 mm²; 0 V: 2 screw terminals for 0.5 ... 4 mm²
Connection method — at outputOutput 1 ... 4: 1 screw terminal each for 0.5 ... 4 mm²
Connection method — for auxiliary contactsRemote reset: 1 screw terminal for 0.5 ... 4 mm²
Connection method — for signaling contact3 screw terminals for 0.5 ... 4 mm²
Width × height × depth of the enclosure72 × 80 × 72 mm
Installation width × mounting height72 mm × 180 mm
Required spacing — top50 mm
Required spacing — bottom50 mm
Fastening methodSnaps onto DIN rail EN 60715 35x7.5/15
Mechanical data — DIN-rail mountingYes
Mechanical data — S7 rail mountingNo
Mechanical data — wall mountingNo
Housing can be lined upYes
Mechanical data — net weight0.2 kg
Mechanical accessoriesDevice identification label 20 mm × 7 mm, TI-grey 3RT2900-1SB20
Other informationSpecifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified)
Type of electric connectionScrew connection
With detachable clampsNo
Single-phase under current possibleNo
Three-phase under current possibleNo
Single-phase overcurrent possibleNo
Three-phase overcurrent possibleNo
Single-phase hysteresis possibleNo
Three-phase hysteresis possibleNo
Contains function DC-voltage under currentNo
Contains function DC-voltage overcurrentYes
Function DC-current hysteresisYes
Rated control supply voltage DC22–30 V
Voltage type for actuatingDC
Current measuring range0.5–3 A
Max. permitted delay-on energization time5 s
Number of contacts as change-over contact1
Width72 mm
Height80 mm
Depth72 mm
Country of originGermany

Properties

MOQ1

Cross-References

Attached Documents