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.
- Part number
- 6EP1933-2EC41
- Model no
- UPS500S
- CE
- EAC
Siemens 6EP1933-2EC41 SITOP UPS500S 24V DC/15A 2.5kWs DC UPS Module
SITOP UPS500S DC UPS module, 24V DC input, 15A/2.5kWs output, USB interface, IP20.
Description
About the UPS500S
About the UPS500S
The Siemens 6EP1933-2EC41 SITOP UPS500S is a maintenance-free DC uninterruptible power supply module that bridges 24 V DC power interruptions using an internal capacitor energy store. Rated for 24 V DC input and 15 A output, it holds a 2.5 kWs energy reserve — enough to sustain full load for 3 seconds or a reduced load for up to 38 seconds — and reports status through a USB interface and floating relay contacts.
Certifications & Standards
- CE
- EAC
- Shipbuilding
- ABS
- DNV
- EPD
Selection Notes
The 15 A bridging rating covers three distinct scenarios rather than a single number: full 15 A load for 3 s, a reduced 10 A draw for 6 s, or 5 A for 15 s — the actual ride-through time depends on how much of the 15 A output the connected load draws. Applications needing longer coverage than the onboard 2.5 kWs capacitor bank provides can add an extension module instead of stepping up to a larger UPS. The USB interface plus floating OK/ALARM/BAT>85% contacts let the module report buffering state to a PLC without extra I/O wiring beyond the existing 24 V DC distribution.
Applications
Bridges short 24 V DC control-power interruptions for PLCs, remote I/O stations, and network switches during mains transfer or brief supply dips, where a battery-based UPS would be oversized for a sub-minute ride-through requirement.
Specification
Full specification
General information 3
| product brand name | SITOP |
|---|---|
| product type designation | UPS500S |
| type of current supply | Basic unit 2.5 kWs |
Input 6
| voltage curve at input | DC |
|---|---|
| supply voltage at DC rated value | 24 V |
| input voltage at DC | 22 ... 29 V |
| adjustable response value voltage for buffer connection preset | 22.5 V |
| adjustable response value voltage for buffer connection | 22 ... 25.5 V; Adjustable in 0.5 V increments |
| input current at rated input voltage 24 V rated value | 15.2 A; + approx. 2.3 A with empty energy storage (capacitor) |
Memory 5
| type of energy storage | with capacitors |
|---|---|
| product function DC-UPS modularly expandable | Yes |
| design of the mains power cut bridging-connection | 15 A for 3 s or 10 A for 6 s or 5 A for 15 s or 2 A for 38 s; longer buffering times with expansion modules |
| buffering time in the event of power failure | 0.05 min |
| energy content of energy storage | 2.5 kW.s |
Show all 90 specifications ↓ Show less ↑76 more values in Identification, Output, Efficiency, Protection and monitoring, Interfaces, Safety, Standards, specifications, approvals, Standards, specifications, approvals marine classification, Standards, specifications, approvals Environmental Product Declaration, Ambient conditions, Connection method, Mechanical data, Accessories, Additional information, Logistics.
Identification 10
| Part number | 6EP1933-2EC41 |
|---|---|
| Type designation | UPS500S |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4025515152392 |
| ETIM class | EC000382 |
| eCl@ss | 27040705 |
Output 12
| output voltage: in normal operation at DC rated value | 24 V |
|---|---|
| output voltage: in buffering mode at DC rated value | 24 V |
| formula for output voltage | 24 V ± 3 % |
| startup delay time typical | 0.6 s |
| voltage increase time of the output voltage typical | 25 ms |
| output voltage in buffering mode at DC | 24 ... 24.7 V |
| output current: rated value | 15 A |
| output current: in normal operation | 0 ... 15 A |
| output current: in buffering mode | 0 ... 15 A |
| peak current | 25 A |
| property of the output short-circuit proof | Yes |
| charging current | 1 A, 2 A |
Efficiency 3
| efficiency in percent: at rated output voltage for rated value of the output current typical | 97.5 % |
|---|---|
| power loss [W]: at rated output voltage for rated value of the output current typical | 9 W |
| supplied active power typical | 360 W |
Protection and monitoring 4
| product function: reverse polarity protection against energy storage unit polarity reversal | Yes |
|---|---|
| product function: reverse polarity protection against input voltage polarity reversal | Yes |
| display version: for normal operation | Normal operation: LED green (OK), floating changeover contact "OK/Bat" to setting "OK" ("OK" means: Voltage of the supplying power supply unit is greater than cut-in threshold set at the DC UPS module); lack of buffer standby: LED red (ALARM), floating changeover contact "ALARM/BAT" to setting "ALARM"; energy storage > 85%: LED green (BAT > 85%), floating NO contact "BAT > 85" closed; permissible contact current capacity: DC 60 V/1 A or AC 30 V /1 A |
| display version: in buffering mode | Buffered mode: LED yellow (BAT), floating changeover contact "OK/BAT" to setting "BAT"; Prewarning buffer end after expiry of 80% of the available buffer time: LED red (ALARM), floating changeover contact "ALARM/BAT" to setting "ALARM"; Energy storage > 85%: LED green (BAT > 85%), floating NO contact "BAT > 85" closed |
Interfaces 3
| product component PC interface | Yes |
|---|---|
| product function communication function | No |
| design of the interface | USB |
Safety 5
| galvanic isolation between input and output | No |
|---|---|
| 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 |
Standards, specifications, approvals 4
| 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 |
| MTBF at 40 °C | 638 570 h |
Standards, specifications, approvals marine classification 3
| shipbuilding approval | Yes |
|---|---|
| Marine classification association: American Bureau of Shipping Europe Ltd. (ABS) | Yes |
| Marine classification association: Det Norske Veritas (DNV) | Yes |
Standards, specifications, approvals Environmental Product Declaration 5
| Environmental Product Declaration | Yes |
|---|---|
| global warming potential [CO2 eq]: total | 270.3 kg |
| global warming potential [CO2 eq]: during manufacturing | 41 kg |
| global warming potential [CO2 eq]: during operation | 228.2 kg |
| global warming potential [CO2 eq]: after end of life | 0.76 kg |
Ambient conditions 4
| ambient temperature: during operation | 0 ... 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 |
Connection method 4
| type of electrical connection | screw terminal |
|---|---|
| at input | 24 V DC: 2 screw terminals for 1 ... 4 mm2/17 ... 11 AWG |
| at output | 24 V DC: 4 screw terminals for 1 ... 4 mm2/17 ... 11 AWG |
| for control circuit and status message | 10 screw terminals for 0.5 ... 2.5 mm2/20 ... 13 AWG |
Mechanical data 11
| width × height × depth of the enclosure | 120 × 125 × 125 mm |
|---|---|
| installation width × mounting height | 120 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 |
Accessories 1
| electrical accessories | Extension module SITOP UPS501S |
|---|
Additional information 1
| other information | Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified) |
|---|
Logistics 6
| Net weight | 0.99 kg |
|---|---|
| Country of origin | Romania |
| Shipping weight | 1.49 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
Documents for 6EP1933-2EC41
No documents are on file for this part yet.
Ask us for the datasheet
Certifications
Certifications and standards
- CE
- EAC
- CE marking
- EAC approval
- shipbuilding approval
- American Bureau of Shipping Europe Ltd. (ABS)
- Det Norske Veritas (DNV)
- Environmental Product Declaration
Quick answers
Questions about the UPS500S
What is the rated current of UPS500S?
The rated current of UPS500S is 15 A.
Which supply voltage is UPS500S rated for?
The rated operational voltage of UPS500S is 24 V AC.
What motor power is UPS500S rated for?
The rated motor power of UPS500S is 97.5 % kW.
What is the HS code of UPS500S for customs?
The tariff (HS) code on file for UPS500S is 85049090.
What is the EAN of UPS500S?
The EAN (GTIN) of UPS500S is 4025515152392.
Where does UPS500S ship from, and how fast?
UPS500S ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
Guides
Guides for power supplies
Reviews
Customer reviews
Series
Siemens SITOP UPS500S
- Brand
- Siemens
- Series
- SITOP UPS500S
