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 6EP3134-0TA00-0AY0 is a SITOP PSU3400 DC/DC converter that regulates a 24 V DC input (14-32 V) into a stabilized, galvanically isolated 24 V DC output at up to 10 A, adjustable from 24 to 28 V via potentiometer. It reaches 93% efficiency, holds a 5 ms minimum buffering time at rated output, and signals output status through a relay contact.
This 24 V-in/24 V-out tap of the PSU3400 family regenerates and galvanically isolates a 24 V DC bus rather than changing voltage level - pick it over the 12 V or 48 V-input variants when the load needs a clean, isolated 24 V rail derived from an already-24 V source, for example downstream of a shared or noisy supply. The rated output steps up to 12.5 A briefly (12 A continuous to +40 degC) before the +60...+70 degC derating band applies, so cabinet ambient temperature sets the real usable current more than the 10 A nameplate figure. Galvanic isolation between input and output (SELV, ES1) is the main reason to choose a converter here instead of simply paralleling two 24 V supplies.
Regenerates and isolates a 24 V DC control bus for a downstream segment that needs its own protected, filtered 24 V supply - for example isolating a noisy drive or motor-control 24 V rail from a cleaner PLC/HMI 24 V rail fed from the same source.
| product brand name | SITOP |
|---|---|
| product type designation | PSU3400 |
| product designation | Power supply SITOP DC-DC converter |
| type of current supply | 24 V/10 A |
| type of the power supply network | DC voltage |
|---|---|
| voltage curve at input | DC |
| supply voltage at AC | Startup as of 18 V, derating necessary for 14 ... 18 V DC |
| supply voltage at DC | 24 V |
| input voltage at DC | 14 ... 32 V |
| wide range input | No |
| overvoltage overload capability | - |
| buffering time for rated value of the output current in the event of power failure minimum | 5 ms |
| operating condition of the mains buffering | at Vin = 24 V |
| input current: at rated input voltage 24 V | 10.8 A |
| current limitation of inrush current at 25 °C maximum | 15 A |
| I2t value maximum | 0.6 A2·s |
| fuse protection type | 25 A (not accessible), breaking capacity 300 A |
| fuse protection type in the feeder | Recommended miniature circuit breaker: 16 A characteristic B or 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 | 24 ... 28 V |
| relative overall tolerance of the voltage | 1% |
| 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 | 250 mV |
| voltage peak: typical | 50 mV |
| display version for normal operation | Green LED for 24 V OK |
| type of signal at output | Relay contact (NO contact, contact rating 30 V AC/0.5 A; 60 V DC/0.3 A; 30 V DC/1 A) for 24 V O.K. |
| behavior of the output voltage when switching on | No overshoot of Vout (soft start) |
| response delay maximum | 0.5 s |
| voltage increase time of the output voltage: typical | 10 ms |
| voltage increase time of the output voltage: maximum | 20 ms |
| output current: rated value | 10 A |
| output current: rated range | 0 ... 12.5 A; 12 A up to +40°C; +60 ... +70 °C: Derating 2%/K |
| supplied active power typical | 260 W |
| bridging of equipment | Yes |
| number of parallel-switched equipment resources for increasing the power | 2 |
| Part number | 6EP3134-0TA00-0AY0 |
|---|---|
| Type designation | PSU3400 |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4025515155454 |
| ETIM class | EC002540 |
| eCl@ss | 27040701 |
| efficiency in percent | 93 % |
|---|---|
| power loss [W]: at rated output voltage for rated value of the output current typical | 20 W |
| power loss [W]: during no-load operation maximum | 1.5 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 load step of resistive load 50/100/50 % typical | 2% |
| setting time: load step 50 to 100% typical | 1 ms |
| setting time: load step 100 to 50% typical | 1 ms |
| design of the overvoltage protection | Ua < 35 V |
|---|---|
| property of the output short-circuit proof | Yes |
| design of short-circuit protection | Electronic shutdown, automatic restart |
| typical | 13 A |
| display version for overload and short circuit | LED yellow for "overload" |
| 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 III |
| protection class IP | IP20 |
| standard: for emitted interference | EN 61000-6-3 |
|---|---|
| standard: for mains harmonics limitation | not applicable |
| 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: CB-certificate | Yes |
| MTBF at 40 °C standards, specifications, approvals hazardous environments | 1 579 080 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 |
| 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, FE: 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 | 42 × 125 × 120 mm |
|---|---|
| installation width × mounting height | 42 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 |
|---|
| other information | Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified) |
|---|
| eClass | 16 27-04-07-01 |
|---|---|
| ETIM | 10 EC002540 |
| IDEA | 4 4130 |
| UNSPSC | 15 39-12-10-04 |
| Net weight | 0.6 kg |
|---|---|
| Country of origin | HU |
| Shipping weight | 1.1 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
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 PSU3400 is 10 A.
The rated motor power of PSU3400 is 0.26 kW.
The tariff (HS) code on file for PSU3400 is 85044095.
The EAN (GTIN) of PSU3400 is 4025515155454.
PSU3400 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
Master PLC system components: CPU, power supply, I/O modules, communication interfaces, and software with sizing formulas and selection tips. Shop at Stoklink.