Main Components of a PLC System: Complete Guide for Engineers
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SITOP BUF8600 buffer module for PSU8600, 100ms ride-through at 40A, electrolytic caps
The Siemens 6EP4297-8HB00-0XY0 is a SITOP BUF8600 buffer module that plugs into a SITOP PSU8600 power supply and uses maintenance-free electrolytic capacitors to hold a 40 A load for 100 ms during a mains interruption. It recharges in about 20 seconds at 400 V and reports buffer status over Ethernet/PROFINET through the PSU8600, giving the shortest, fastest-cycling bridge in the buffer-module line.
At 4,505,531 hours the MTBF on this module is well above the other BUF8600 buffer durations covered in this line, consistent with electrolytic capacitors doing less work per cycle than the longer-duration double-layer capacitor versions. A 20-second recharge at 400 V means it is ready again almost immediately after a dip, which fits equipment that sees frequent short line disturbances rather than a single sustained outage. Use it to ride through switching transients and brief sags on a PSU8600 rack, not as a substitute for a battery-backed UPS module.
| product brand name | SITOP |
|---|---|
| product type designation | BUF8600 |
| type of current supply | 100 ms/40 A |
| type of energy storage | electrolytic capacitors |
|---|---|
| product function DC-UPS modularly expandable | Yes |
| design of the mains power cut bridging-connection | Backup time with 40 A load current: 100 ms |
| buffering time for rated value of the output current in the event of power failure | 100 ms |
| load time typical | 20 s; at 400 V |
| output current: rated value | 40 A |
|---|
| Part number | 6EP4297-8HB00-0XY0 |
|---|---|
| Type designation | BUF8600 |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4025515154501 |
| ETIM class | EC000382 |
| eCl@ss | 27040705 |
| display version | 3-color LED for operating state module |
|---|---|
| for normal operation | LED green for "buffer standby exist" |
| in buffering mode | LED yellow for "buffered mode" |
| product function communication function | Yes |
|---|---|
| design of the interface | Ethernet/PROFINET via power supply unit PSU8600 |
| operating resource protection class | Class III |
|---|---|
| protection class IP | IP20 |
| standard: for emitted interference | EN 55022 Class B |
| 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 |
| type of certification CB-certificate | Yes |
| MTBF at 40 °C | 4 505 531 h |
| certificate of suitability: ATEX | No |
|---|
| shipbuilding approval | Yes |
|---|---|
| Marine classification association: American Bureau of Shipping Europe Ltd. (ABS) | Yes |
| Marine classification association: Det Norske Veritas (DNV) | Yes |
| Environmental Product Declaration | Yes |
|---|---|
| global warming potential [CO2 eq]: total | 56.6 kg |
| global warming potential [CO2 eq]: during manufacturing | 21.1 kg |
| global warming potential [CO2 eq]: during operation | 34.7 kg |
| global warming potential [CO2 eq]: after end of life | 0.4 kg |
| ambient temperature: during operation | -25 ... +60 °C; with natural convection |
|---|---|
| ambient temperature: during transport | -40 ... +70 °C |
| ambient temperature: during storage | -40 ... +70 °C |
| environmental category according to IEC 60721 | Climate class 3K3, 5 ... 95% no condensation |
| suitability for interaction modular system | Yes |
|---|---|
| type of connection to system components | Via integrated connector |
| width × height × depth of the enclosure | 60 × 125 × 150 mm |
|---|---|
| installation width × mounting height | 60 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 |
| 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 27-04-07-05 |
|---|---|
| ETIM | 10 EC000382 |
| IDEA | 4 4149 |
| UNSPSC | 15 39-12-10-11 |
| Net weight | 1.33 kg |
|---|---|
| Country of origin | Romania |
| Shipping weight | 1.83 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 BUF8600 is 40 A.
The tariff (HS) code on file for BUF8600 is 85322200.
The EAN (GTIN) of BUF8600 is 4025515154501.
BUF8600 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.