Main Components of a PLC System: Complete Guide for Engineers
Master PLC system components: CPU, power supply, I/O modules, communication interfaces, and software with sizing formulas and selection tips. Shop at Stoklink.
The Siemens 6EP1436-2BA10 is a SITOP PSU300S stabilized power supply that converts 400-500 V three-phase AC input into a regulated 24 V DC output rated at 20 A. It delivers 91% efficiency, 480 W typical output power, and only 6 ms buffering time, with electronic short-circuit shutdown and automatic restart.
The 20 A / 480 W rating and three-phase 400-500 V input suit larger control cabinets or multi-drop 24 V DC bus segments beyond what a single-phase supply covers. The 150% overload capability for up to 5 s per minute accommodates inrush loads such as contactor coils or motor starters without nuisance shutdown, and the soft-start output with no voltage overshoot protects sensitive downstream electronics at power-up.
Three-phase distribution cabinets, high-current 24 V DC bus supply for larger PLC and motor-control installations, and applications with intermittent inrush loads such as relay or contactor banks.
| product brand name | SITOP |
|---|---|
| product type designation | PSU300S |
| product designation | Power supply SITOP smart |
| type of current supply | 24 V/20 A |
| type of the power supply network | 3-phase AC |
|---|---|
| phase number | 3 |
| voltage curve at input | AC |
| supply voltage at AC: minimum rated value | 400 V |
| supply voltage at AC: maximum rated value | 500 V |
| supply voltage at AC: initial value | 340 V |
| supply voltage at AC: full-scale value | 550 V |
| supply voltage: at 50 Hz | 400 V |
| supply voltage: at 60 Hz | 500 V |
| line frequency | 50/60 Hz |
| wide range input | Yes |
| buffering time for rated value of the output current in the event of power failure minimum | 6 ms |
| operating condition of the mains buffering | at Vin = 400 V |
| input current: at rated input voltage 400 V | 1.2 A |
| input current: at rated input voltage 500 V | 1 A |
| current limitation of inrush current at 25 °C maximum | 36 A |
| I2t value maximum | 0.9 A2·s |
| fuse protection type | none |
| fuse protection type in the feeder | Required: 3-pole connected miniature circuit breaker 6 ... 16 A characteristic C or circuit breaker 3RV2011-1DA10 (setting 3 A) or 3RV2711-1DD10 (UL 489- listed, DIVQ) |
| 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 | 24 ... 28 V; max. 480 W |
| relative overall tolerance of the voltage | 3% |
| relative control precision of the output voltage: on slow fluctuation of input voltage | 0.5 % |
| residual ripple: maximum | 150 mV |
| voltage peak: maximum | 240 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 | No overshoot of Vout (soft start) |
| response delay maximum | 1.5 s |
| voltage increase time of the output voltage: typical | 30 ms |
| voltage increase time of the output voltage: maximum | 500 ms |
| output current: rated value | 20 A |
| output current: rated range | 0 ... 20 A |
| supplied active power typical | 480 W |
| short-term overload current: on short-circuiting during the start-up typical | 35 A |
| short-term overload current: at short-circuit during operation typical | 35 A |
| duration of overloading capability for excess current: on short-circuiting during the start-up | 100 ms |
| duration of overloading capability for excess current: at short-circuit during operation | 100 ms |
| bridging of equipment | Yes |
| number of parallel-switched equipment resources for increasing the power | 2 |
| Part number | 6EP1436-2BA10 |
|---|---|
| Type designation | PSU300S |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4025515151388 |
| ETIM class | EC002540 |
| eCl@ss | 27040701 |
| efficiency in percent | 91 % |
|---|---|
| power loss [W]: at rated output voltage for rated value of the output current typical | 47 W |
| relative control precision of the output voltage with rapid fluctuation of the input voltage by +/- 15% typical | 3% |
|---|---|
| relative control precision of the output voltage load step of resistive load 50/100/50 % typical | 3% |
| setting time: load step 50 to 100% typical | 2 ms |
| setting time: load step 100 to 50% typical | 2 ms |
| 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 | 2 ms |
| setting time: load step 90 to 10% typical | 2 ms |
| setting time: maximum | 10 ms |
| design of the overvoltage protection | protection against overvoltage in case of internal fault Vout < 35 V |
|---|---|
| property of the output short-circuit proof | Yes |
| design of short-circuit protection | Electronic shutdown, automatic restart |
| typical | 25.5 A |
| overcurrent overload capability: in normal operation | overload capability 150 % Iout rated up to 5 s/min |
| enduring short circuit current RMS value: maximum | 7 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 | 1 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 |
| certificate of suitability: SEMI F47 | Yes |
| type of certification: BIS | Yes; R-41183539 |
| type of certification: CB-certificate | Yes |
| MTBF at 40 °C | 500 000 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) | 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 |
| Environmental Product Declaration | Yes |
|---|---|
| global warming potential [CO2 eq]: total | 1 500 kg |
| global warming potential [CO2 eq]: during manufacturing | 31.6 kg |
| global warming potential [CO2 eq]: during operation | 1 470 kg |
| global warming potential [CO2 eq]: after end of life | 0.48 kg |
| 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 |
| type of electrical connection | screw terminal |
|---|---|
| at input | L1, L2, L3, PE: 1 screw terminal each for 0.5 ... 4 mm2 single-core/finely stranded |
| at output | +, -: 2 screw terminals each for 0.2 ... 4 mm2 |
| for auxiliary contacts | 13, 14 (alarm signal): 1 screw terminal each for 0.05 ... 2.5 mm2 |
| width × height × depth of the enclosure | 90 × 145 × 150 mm |
|---|---|
| installation width × mounting height | 90 mm × 225 mm |
| required spacing: top | 40 mm |
| required spacing: bottom | 40 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 | Redundancy module, buffer module, selectivity module, DC UPS |
|---|---|
| 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 | 31.6 kg |
|---|
| Net weight | 1.6 kg |
|---|---|
| Country of origin | Romania |
| Shipping weight | 2.1 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 PSU300S is 20 A.
The rated operational voltage of PSU300S is 400–500, 3–phase V AC.
The rated motor power of PSU300S is 0.48 kW.
The tariff (HS) code on file for PSU300S is 85044083.
The EAN (GTIN) of PSU300S is 4025515151388.
PSU300S 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.