Main Components of a PLC System: Complete Guide for Engineers
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The Siemens 6EP1333-2BA20 is a SITOP PSU100S DIN-rail power supply that converts 120/230 V AC input into a stabilized 24 V DC output rated at 5 A. It operates with automatic input voltage range selection, delivers 88% efficiency, and provides a 20 ms buffer time on the output during a mains interruption. The output voltage is adjustable from 22.8 to 28 V via potentiometer.
The 5 A rating covers a control cabinet with a compact CPU, an HMI panel, and a modest set of 24 V field devices without stacking additional supplies. Loads that regularly exceed the 6 A overload ceiling need the higher-current PSU100S variant in the same enclosure family instead. The 800 ms overload window at up to 18 A absorbs the inrush from contactor coils or lamp loads without nuisance-tripping the upstream miniature circuit breaker, and two units can run in parallel to double the available output current on the same DIN rail.
Fits control panels, ET 200 remote I/O stations, and PLC/HMI power distribution in cabinets already standardized on SITOP. The -25°C to +70°C operating range with natural convection covers unheated enclosures and outdoor cabinets within the 47-63 Hz mains tolerance.
| product brand name | SITOP |
|---|---|
| product type designation | PSU100S |
| product designation | Power supply SITOP smart |
| type of current supply | 24 V/5 A |
| type of the power supply network | 1-phase AC |
|---|---|
| phase number | 1 |
| voltage curve at input | AC |
| supply voltage at AC | Automatic range selection |
| supply voltage | 120 V/230 V |
| input voltage 1 at AC | 85 ... 132 V |
| input voltage 2 at AC | 170 ... 264 V |
| supply voltage: at 50 Hz | 230 V |
| supply voltage: at 60 Hz | 120 V |
| line frequency | 50/60 Hz |
| wide range input | No |
| overvoltage overload capability | 2.3 × Vin rated, 1.3 ms |
| buffering time for rated value of the output current in the event of power failure minimum | 20 ms |
| operating condition of the mains buffering | at Vin = 93/187 V |
| input current: at rated input voltage 120 V | 2.34 A |
| input current: at rated input voltage 230 V | 1.36 A |
| current limitation of inrush current at 25 °C maximum | 40 A |
| I2t value maximum | 1 A2·s |
| fuse protection type | T 3,15 A/250 V (not accessible) |
| fuse protection type in the feeder | Recommended miniature circuit breaker: from 6 A characteristic C |
| voltage curve at output | Controlled, isolated DC voltage |
|---|---|
| product function output voltage controlled | Yes |
| product function output voltage stabilized | Yes |
| output voltage at DC rated value | 24 V |
| output voltage: at output 1 at DC rated value | 24 V |
| output voltage: at output 1 at DC | 24 V |
| output voltage adjustable | Yes; via potentiometer |
| adjustable output voltage | 22.8 ... 28 V |
| relative overall tolerance of the voltage | 3% |
| relative control precision of the output voltage: on slow fluctuation of input voltage | 0.1 % |
| residual ripple: maximum | 150 mV |
| residual ripple: typical | 30 mV |
| voltage peak: maximum | 240 mV |
| voltage peak: typical | 140 mV |
| display version for normal operation | Green LED for 24 V OK |
| type of signal at output | Relay contact (NO contact, rating 60 V DC/ 0.3 A) for "24 V OK" |
| behavior of the output voltage when switching on | Overshoot of Vout < 3 % |
| response delay maximum | 0.3 s |
| voltage increase time of the output voltage: typical | 15 ms |
| output current: rated value | 5 A |
| output current: rated range | 0 ... 6 A; 6 A up to +45°C; +60 ... +70 °C: Derating 1.6%/K |
| supplied active power typical | 144 W |
| short-term overload current: on short-circuiting during the start-up typical | 18 A |
| short-term overload current: at short-circuit during operation typical | 18 A |
| duration of overloading capability for excess current: on short-circuiting during the start-up | 800 ms |
| duration of overloading capability for excess current: at short-circuit during operation | 800 ms |
| bridging of equipment | Yes |
| number of parallel-switched equipment resources for increasing the power | 2 |
| Part number | 6EP1333-2BA20 |
|---|---|
| Type designation | PSU100S |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4025515153481 |
| ETIM class | EC002540 |
| eCl@ss | 27040701 |
| efficiency in percent | 88 % |
|---|---|
| power loss [W]: at rated output voltage for rated value of the output current typical | 16 W |
| relative control precision of the output voltage with rapid fluctuation of the input voltage by +/- 15% typical | 0.3 % |
|---|---|
| relative control precision of the output voltage at load step of resistive load 10/90/10 % typical | 3% |
| setting time: load step 10 to 90% typical | 1 ms |
| setting time: load step 90 to 10% typical | 1 ms |
| design of the overvoltage protection | protection against overvoltage in case of internal fault Vout < 33 V |
|---|---|
| property of the output short-circuit proof | Yes |
| design of short-circuit protection | Constant current characteristic |
| response value current limitation | 6 ... 7.1 A |
| overcurrent overload capability: in normal operation | overload capability 150 % Iout rated up to 5 s/min |
| enduring short circuit current RMS value: typical | 7.1 A |
| galvanic isolation between input and output | Yes |
|---|---|
| galvanic isolation | Output voltage: SELV, ES1 (IEC 62368-1), DVC As (IEC 61204-7) |
| operating resource protection class | Class I |
| leakage current: maximum | 3.5 mA |
| leakage current: typical | 0.4 mA |
| protection class IP | IP20 |
| standard: for emitted interference | EN 55022 Class B |
|---|---|
| standard: for mains harmonics limitation | EN 61000-3-2 |
| standard: for interference immunity | EN 61000-6-2 |
| 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: UKCA marking | Yes |
| certificate of suitability: EAC approval | Yes |
| certificate of suitability: NEC Class 2 | No |
| type of certification: BIS | Yes; R-41183539, R-41188271 |
| type of certification: CB-certificate | Yes |
| MTBF at 40 °C | 1 998 441 h |
| certificate of suitability: IECEx | No |
|---|---|
| certificate of suitability: ATEX | No |
| certificate of suitability: ULhazloc approval | No |
| certificate of suitability: FM registration | No |
| shipbuilding approval | Yes |
|---|---|
| Marine classification association: American Bureau of Shipping Europe Ltd. (ABS) | No |
| Marine classification association: French marine classification society (BV) | Yes |
| Marine classification association: Det Norske Veritas (DNV) | Yes |
| Marine classification association: Lloyds Register of Shipping (LRS) | No |
| Environmental Product Declaration | Yes |
|---|---|
| global warming potential [CO2 eq]: total | 447.2 kg |
| global warming potential [CO2 eq]: during manufacturing | 12.9 kg |
| global warming potential [CO2 eq]: during operation | 433.8 kg |
| global warming potential [CO2 eq]: after end of life | 0.37 kg |
| ambient temperature: during operation | -25 ... +70 °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 |
| type of electrical connection | screw terminal |
|---|---|
| at input | L, N, PE: 1 screw terminal each for 0.5 ... 2.5 mm2 single-core/finely stranded |
| at output | +, -: 2 screw terminals each for 0.5 ... 2.5 mm2 |
| for auxiliary contacts | Alarm signals: 2 screw terminals for 0.5 ... 2.5 mm2 |
| for signaling contact | 2 screw terminals for 0.5 ... 2.5 mm2 |
| width × height × depth of the enclosure | 50 × 125 × 120 mm |
|---|---|
| installation width × mounting height | 50 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 |
| electrical accessories | Buffer module |
|---|---|
| mechanical accessories | Device identification label 20 mm × 7 mm, pale turquoise 3RT1900-1SB20 |
| other information | Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified) |
|---|
| Environmental Product Declaration: global warming potential [CO2 eq] / during manufacturing | 12.9 kg |
|---|
| 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
No documents are on file for this part yet.
Ask us for the datasheetThe rated current of PSU100S is 5 A.
The rated operational voltage of PSU100S is 120–230 V AC.
The rated motor power of PSU100S is 0.144 kW.
The tariff (HS) code on file for PSU100S is 85044083.
The EAN (GTIN) of PSU100S is 4025515153481.
PSU100S ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
Master PLC system components: CPU, power supply, I/O modules, communication interfaces, and software with sizing formulas and selection tips. Shop at Stoklink.