Main Components of a PLC System: Complete Guide for Engineers
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The Siemens 6EP3437-8MB00-2CY0 is a SITOP PSU8600 power supply with four independently monitored 24 V DC outputs rated 10 A each (40 A / 960 W total system power), taking 400-500 V 3AC input and offering an integrated PROFINET interface with a built-in web server and OPC UA server for remote diagnostics.
The 6EP3437-8MB00-2CY0 is the 4x10 A PROFINET variant of the PSU8600 family, doubling the per-output current of the 4x5 A model for machines with heavier individually-fused 24 V DC branches. As with the smaller model, outputs 1-2 and 3-4 can be paralleled via DIP switch when one branch needs more than 10 A, up to the 960 W system total. The same PROFINET/OPC UA interface reports per-output voltage, current, and DC-OK state, so branch-level diagnostics scale up without adding wiring as the machine's power budget grows. Choose this model over the 4x5 A 8436 variant when connected loads regularly draw more than 5 A per branch; choose the single-output 40 A PSU8600 model instead if the installation does not need four independently supervised circuits.
| product brand name | SITOP |
|---|---|
| product type designation | PSU8600 |
| product designation | Power supply SITOP PSU8600 |
| type of current supply | 24 V/40 A/4x 10 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 | 320 V |
| supply voltage at AC: full-scale value | 575 V |
| supply voltage at AC | Derating 320 ... 360 and 530 ... 575 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 | 15 ms |
| operating condition of the mains buffering | at Vin = 400 V; Prioritized supply of Output 1 in case of power failure selectable via DIP switch |
| input current: at rated input voltage 400 V | 2.75 A |
| input current: at rated input voltage 500 V | 2.2 A |
| current limitation of inrush current at 25 °C maximum | 14 A |
| I2t value maximum | 2.24 A2·s |
| fuse protection type | none |
| fuse protection type in the feeder | Required: 3-pole connected miniature circuit breaker 10 ... 16 A characteristic C or circuit breaker 3RV2011-1DA10 (setting 3 A) or 3RV2711-1DD10 (UL 489) |
| voltage curve at output | Controlled, isolated DC voltage |
|---|---|
| product function output voltage controlled | Yes |
| product function output voltage stabilized | Yes |
| number of outputs | 4 |
| output voltage at DC rated value | 24 V |
| output voltage: at output 1 at DC rated value | 24 V |
| output voltage: at output 2 at DC rated value | 24 V |
| output voltage: at output 3 at DC rated value | 24 V |
| output voltage: at output 4 at DC rated value | 24 V |
| output voltage: at output 1 at DC | 5 ... 24 V |
| output voltage: at output 2 at DC | 5 ... 24 |
| output voltage: at output 3 at DC | 5 ... 24 |
| output voltage: at output 4 at DC | 5 ... 24 |
| output voltage adjustable | Yes; via potentiometer or IE/PN interface |
| adjustable output voltage | 4 ... 28 V; Derating > 24 V: 4%/V; max. 240 W per output, max. 960 W overall system |
| relative overall tolerance of the voltage | 3% |
| relative control precision of the output voltage: on slow fluctuation of input voltage | 0.2 % |
| residual ripple: maximum | 100 mV |
| voltage peak: maximum | 200 mV |
| display version for normal operation | 3-color LED for operating state device; LED for operating mode manual/remote; 4 LEDs for communication PROFINET; 3-color LED per output for operating state output; LED green for parallel operation Output 1 and 2 / 3 and 4 |
| type of signal at output | Relay contact (changeover contact, contact current capacity DC 60 V/0.3 A) for "Operating state OK" |
| behavior of the output voltage when switching on | No overshoot of Vout (soft start) |
| response delay maximum | 1 s; Without on-delay of the outputs |
| type of outputs connection | simultaneous switch-on of all outputs after device power-up or delay time of 25 ms, 100 ms, or "load-optimized" for sequential switch-on of the outputs via DIP switch configurable |
| voltage increase time of the output voltage: maximum | 500 ms |
| output current: rated value | 40 A |
| output current: per output | 10 A |
| output current: at output 1 rated value | 10 A |
| output current: at output 2 rated value | 10 A |
| output current: at output 3 rated value | 10 A |
| output current: at output 4 rated value | 10 A |
| output current: rated range | 0 ... 40 A; +50 ... +60 °C: Derating 2.5%/K; no derating in connection with expansion module CNX8600 and total load of the outputs at the basic device max. 480 W |
| supplied active power typical | 960 W |
| parallel switching of outputs | Yes; Parallel circuit Output 1 with 2 or Output 3 with 4 can be selected via DIP switch |
| bridging of equipment | No |
| Part number | 6EP3437-8MB00-2CY0 |
|---|---|
| Type designation | PSU8600 |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4025515154471 |
| 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 | 72 W |
| power loss [W]: during no-load operation maximum | 20 W |
| relative control precision of the output voltage with rapid fluctuation of the input voltage by +/- 15% typical | 0.1 % |
|---|---|
| relative control precision of the output voltage load step of resistive load 50/100/50 % typical | 0.4 % |
| setting time: maximum | 10 ms |
| design of the overvoltage protection | max. 35 V (max. 500 ms) |
|---|---|
| property of the output short-circuit proof | Yes |
| design of short-circuit protection | electronic overload cut-off; optionally constant current operation can be selected for Output 4 via DIP switches |
| adjustable current response value current of the current-dependent overload release | 0.5 ... 10 A |
| type of response value setting | via potentiometer or IE/PN interface |
| switching characteristic: of the excess current | Ia >1.0...<1.5 x Ia threshold for 5 s permissible; Ia limit (= 1.5 x Ia threshold) for 200 ms permissible |
| switching characteristic: of the current limitation | Ia limit (= 1.5 x Ia threshold) permissible for 5 s, afterwards Ia threshold continuous |
| overcurrent overload capability: in normal operation | Total system overloadable 150% Ia rated to 5 s/min |
| display version for overload and short circuit | 3-color LED for operating state device; 3-color LED per output for operating state output |
| design of the reset device/resetting mechanism | via sensor per output or IE/PN interface |
| remote reset function | non-isolated 24 V input (signal level "high" at > 15 V) |
| product function communication function | Yes |
|---|---|
| design of the interface | Ethernet/PROFINET |
| design of the interface PROFINET protocol | Yes |
| protocol is supported: OPC UA | Yes |
| electrical separation 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 |
| 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: EAC approval | Yes |
| certificate of suitability: NEC Class 2 | No |
| certificate of suitability: SEMI F47 | Yes |
| type of certification: BIS | Yes; R-41188271 |
| type of certification: CB-certificate | Yes |
| MTBF at 40 °C | 207 612 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 | 1 886.7 kg |
| global warming potential [CO2 eq]: during manufacturing | 62.2 kg |
| global warming potential [CO2 eq]: during operation | 1 823.2 kg |
| global warming potential [CO2 eq]: after end of life | 0.52 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 | Plug-in terminals with screwed connection |
|---|---|
| at input | L1, L2, L3, PE: Plug-in terminal with 1 screwed connection each for 0.2 ... 4 mm2 single-wire / fine stranded |
| at output | 1, 2, 3, 4: Two plug-in terminals (1, 2 and 3, 4) with 2 screwed connections each for 0.2 ... 2.5 mm2; 0 V: Plug-in terminal with 3 screwed connections for 0.2 ... 10 mm2 (max. 6 mm2 with ferrule) |
| for auxiliary contacts | RST (Reset): Plug-in terminal (together with alarm signal) with 1 screwed connection for 0.2 ... 1.5 mm2 |
| for signaling contact | 11, 12, 14 (alarm signal): Plug-in terminal (together with Reset) with 1 screwed connection each for 0.2 ... 1.5 mm2 |
| removable terminal at input | Yes |
| removable terminal at output | Yes |
| design of the interface for communication | PROFINET/Ethernet: two RJ45 sockets (2-port switch) |
| suitability for interaction modular system | Yes |
| width × height × depth of the enclosure | 125 × 125 × 150 mm |
|---|---|
| installation width × mounting height | 125 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 35x15 |
| DIN-rail mounting | Yes |
| S7 rail mounting | No |
| wall mounting | No |
| housing can be lined up | Yes |
| electrical accessories | Expansion modules CNX8600, buffer modules BUF8600, module UPS8600 |
|---|---|
| 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) |
|---|
| eClass | 16 27-04-07-01 |
|---|---|
| ETIM | 10 EC002540 |
| IDEA | 4 4130 |
| UNSPSC | 15 39-12-10-04 |
| Net weight | 2.62 kg |
|---|---|
| Country of origin | Romania |
| Shipping weight | 3.12 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 PSU8600 is 10 A.
The rated operational voltage of PSU8600 is 400–500 V AC.
The rated motor power of PSU8600 is 0.96 kW.
The tariff (HS) code on file for PSU8600 is 85044083.
The EAN (GTIN) of PSU8600 is 4025515154471.
PSU8600 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.