Main Components of a PLC System: Complete Guide for Engineers
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Siemens 6EP3337-8SB00-0AY0 is a SITOP PSU8200 stabilized power supply that converts 120/230 V AC input into a regulated 24 V DC output rated at 40 A (960 W), with output voltage adjustable from 24 to 28 V via potentiometer. It provides galvanic isolation, short-circuit protection, and 25 ms buffering on mains loss.
The 40 A / 960 W rating and adjustable 24-28 V output place this near the top of the PSU8200 power range for a single unit; two units can be paralleled to raise available power further, which matters when a cabinet's DC bus needs headroom beyond 960 W without moving to a different frame size. The 25 ms buffering time and SELV isolation make it appropriate as the primary 24 V bus feed for PLC and I/O loads rather than a battery-backed branch, since no energy storage is built into the unit itself.
Primary 24 V DC bus supply for automation cabinets with high load current such as drives, I/O racks, and relay banks; marine and offshore panels covered by ABS/DNV shipbuilding approval; and parallel-redundant power architectures for critical 24 V loads.
| product brand name | SITOP |
|---|---|
| product type designation | PSU8200 |
| product designation | Power supply SITOP modular |
| type of current supply | 24 V/40 A |
| type of the power supply network | 1-phase and 2-phase AC |
|---|---|
| phase number | 1 |
| voltage curve at input | AC |
| supply voltage at AC | Automatic selection; startup starting from Ue ≥ 90/180 V |
| 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 |
| buffering time for rated value of the output current in the event of power failure minimum | 25 ms |
| operating condition of the mains buffering | at Vin = 230 V |
| input current: at rated input voltage 120 V | 15 A |
| input current: at rated input voltage 230 V | 9 A |
| current limitation of inrush current at 25 °C maximum | 50 A |
| I2t value maximum | 8 A2·s |
| fuse protection type | Yes |
| fuse protection type in the feeder | Recommended miniature circuit breaker at 1-phase operation: 16 A characteristic C; required at 2-phase operation: circuit breaker 2-pole connected or circuit breaker 3RV2421-4BA10 (120 V) or 3RV2411-1JA10 (230 V) |
| 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. 960 W |
| 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 | 100 mV |
| residual ripple: typical | 50 mV |
| voltage peak: maximum | 240 mV |
| voltage peak: typical | 220 mV |
| display version for normal operation | Green LED for 24 V OK; LED yellow for overload; LED red for short-circuit or latching shutdown |
| 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 approx. 3 % |
| response delay maximum | 1.5 s |
| voltage increase time of the output voltage: typical | 30 ms |
| output current: rated value | 40 A |
| output current: rated range | 0 ... 40 A; +60 ... +70 °C: Derating 3%/K |
| supplied active power typical | 960 W |
| short-term overload current: on short-circuiting during the start-up typical | 120 A |
| short-term overload current: at short-circuit during operation typical | 120 A |
| duration of overloading capability for excess current: on short-circuiting during the start-up | 25 ms |
| duration of overloading capability for excess current: at short-circuit during operation | 25 ms |
| constant overload current: on short-circuiting during the start-up typical | 60 A |
| bridging of equipment | Yes; switchable characteristic |
| number of parallel-switched equipment resources for increasing the power | 2 |
| Part number | 6EP3337-8SB00-0AY0 |
|---|---|
| Type designation | PSU8200 |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4025515154747 |
| ETIM class | EC002540 |
| eCl@ss | 27040701 |
| efficiency in percent | 92 % |
|---|---|
| power loss [W]: at rated output voltage for rated value of the output current typical | 82 W |
| power loss [W]: during no-load operation maximum | 6.8 W |
| relative control precision of the output voltage with rapid fluctuation of the input voltage by +/- 15% typical | 1% |
|---|---|
| relative control precision of the output voltage load step of resistive load 50/100/50 % typical | 1.9 % |
| 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 | 3.8 % |
| setting time: load step 10 to 90% typical | 1 ms |
| setting time: load step 90 to 10% typical | 1 ms |
| setting time: maximum | 1 ms |
| design of the overvoltage protection | < 32 V |
|---|---|
| property of the output short-circuit proof | Yes |
| design of short-circuit protection | Alternatively, constant current characteristic approx. 41 A or latching shutdown |
| typical | 41 A |
| overcurrent overload capability: in normal operation | 250% Iout rated up to 25 ms, 150% Iout rated up to 5 s/min |
| enduring short circuit current RMS value: typical | 41 A |
| display version for overload and short circuit | LED yellow for "overload", LED red for "latching shutdown" or "short-circuit" |
| 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 | 0.1 mA |
| leakage current: typical | 0.1 mA |
| protection class IP | IP20 |
| standard: for emitted interference | EN 55022 Class B |
|---|---|
| standard: for mains harmonics limitation | - |
| 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: EAC approval | Yes |
| certificate of suitability: Regulatory Compliance Mark (RCM) | Yes |
| certificate of suitability: NEC Class 2 | No |
| type of certification: BIS | Yes; R-41183539 |
| type of certification: CB-certificate | Yes |
| MTBF at 40 °C | 838 156 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 | 2 152.1 kg |
| global warming potential [CO2 eq]: during manufacturing | 74.1 kg |
| global warming potential [CO2 eq]: during operation | 2 076.5 kg |
| global warming potential [CO2 eq]: after end of life | 0.62 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 0.2 ... 4 mm2 single-core/finely stranded |
| at output | +, -: 2 screw terminals each for 0.5 ... 10 mm2 |
| for auxiliary contacts | 13, 14 (alarm signal): 1 screw terminal each for 0.14 ... 1.5 mm2 |
| width × height × depth of the enclosure | 145 × 145 × 150 mm |
|---|---|
| installation width × mounting height | 150 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 35x15 |
| DIN-rail mounting | Yes |
| S7 rail mounting | No |
| wall mounting | No |
| housing can be lined up | Yes |
| electrical accessories | Buffer module, redundancy module |
|---|---|
| mechanical accessories | Device identification label 20 mm × 7 mm, TI-grey 3RT2900-1SB20 |
| 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 | 74.1 kg |
|---|
| Net weight | 3.1 kg |
|---|---|
| Country of origin | Romania |
| Shipping weight | 3.6 kg |
| Ships from | Türkiye |
| Dispatch | 13 Nov |
| Stock | Low 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 PSU8200 is 40 A.
The rated operational voltage of PSU8200 is 120–230 V AC.
The rated motor power of PSU8200 is 0.96 (960 W rated output) kW.
The tariff (HS) code on file for PSU8200 is 85044083.
The EAN (GTIN) of PSU8200 is 4025515154747.
PSU8200 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.