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Siemens SITOP: UPS and add-on modules (roots 6EP19 and 6EP41)
In addition to power supplies, the SITOP range includes modules that protect and distribute the 24 V: DC UPS units that keep PLCs and PCs powered during mains outages, and add-on modules for diagnostics, selectivity and output redundancy.
The E-Repair catalogue covers about 34 part numbers for these modules.
⚙️ Product lines in the catalogue
| Root | Content | Part numbers |
| 6EP1931 | DC UPS modules with battery charger for lead-acid batteries, for example 10, 15 and 40 A | 15 |
| 6EP1933 | UPS500S and UPS500P, maintenance-free, with capacitor storage | 2 |
| 6EP1935 | UPS501S expansion modules for UPS500S | 7 |
| 6EP1961 | SITOP select (multi-channel diagnostics), PSE200 modules and buffer modules | 7 |
| 6EP4131, 6EP4134, 6EP4136 | UPS1100 (battery modules) and UPS1600 | 3 |
👉 6EP1931-2DC01 – DC UPS module with battery charger
👉 6EP1961-2BA00 – SITOP select diagnostic module
👉 6EP4136-3AB00-0AY0 – SITOP UPS1600 20 A
👉 Search the catalogue: 6EP1931 · 6EP1935 · 6EP1961
⚠️ Typical faults
- exhausted batteries or degraded storage capacitors, with reduced backup time
- faulty charging circuits
- switchover not taking place when the mains fails
- diagnostic module channels that do not switch or report non-existent faults
A UPS that does not switch over is often only discovered at the first blackout: periodically checking backup time and battery condition avoids nasty surprises.
🛠️ E-Repair services for SITOP UPS and modules
As Approved Partner Siemens – Industry Services, E-Repair supports production continuity:
🔧 Component-level repair in E-Repair's certified in-house laboratory, with diagnosis and repair where technically feasible.
♻️ Refurbishment with replacement of components subject to ageing and functional testing according to the agreed scope of work.
🚚 Advance replacement with a refurbished or new product, if available in stock and after a compatibility check.
🛠️ On-site and remote technical assistance for diagnosis and recommissioning.
✅ Standard 12-month warranty on the services for which it applies, extendable up to 24 months under the applicable conditions.
❓ Frequently asked questions
✔️ Can UPS batteries be repaired?
Batteries are consumables and are replaced; the UPS module itself, however, can often be repaired.
✔️ What is the difference between UPS500S and battery DC UPS?
The UPS500S stores energy in capacitors and requires no battery maintenance; DC UPS modules use lead-acid batteries with longer backup time.
✔️ What is needed for the diagnosis?
The full part number from the rating plate, a description of the fault and, if present, the data of the connected batteries.
📚 Further reading
👉 SITOP range · 👉 SITOP single-phase · 👉 SITOP three-phase and DC/DC
ℹ️ The information provided is general and indicative. Before purchase, installation or commissioning, check the data against the official Siemens documentation or contact E-Repair.
