Siemens in Ukraine: SINAMICS, SIMATIC, SIRIUS, MicroMaster

Siemens: what kind of company it is and where it stands in industrial automation

Siemens AG is a German conglomerate headquartered in Munich and Berlin, founded in 1847 by Werner von Siemens and Johann Halske as a telegraph-equipment workshop. Over 175+ years it has grown into one of four global hubs of industrial automation alongside ABB, Schneider Electric and Mitsubishi Electric. On a serious project it is the brand a design engineer writes into the spec "by default" when the customer does not constrain the budget hard.

Siemens sits in the corporate tier: typical drive equipment runs roughly 20-40% more than INVT, Veichi or Delta. What you pay for is not the nameplate. The first thing you pay for is the depth of integration inside the TIA Portal (Totally Integrated Automation) ecosystem: SINAMICS drive, SIMATIC controller and SIMATIC HMI panel are engineered in one environment, see each other over PROFINET/PROFIBUS with stock libraries, and that saves the engineer days of commissioning the link. The second is predictability over the long haul: product lines live for years, documentation is detailed, firmware and service stay available 10+ years out. Siemens is chosen deliberately. When a site follows a corporate standard. When there is already a Siemens installed base and a team trained on it. Or when guaranteed compatibility of drive, PLC and HMI from one source is required. If none of that applies and the budget is tight, we say so plainly: INVT or Veichi will do the same job for less. The Siemens premium pays for the ecosystem and service depth, not for the brand as such.

What we carry from Siemens: frequency inverters, PLCs, soft starters, HMI, sensors

Siemens is represented in our catalogue across five directions. The largest by volume is programmable controllers: over two hundred SIMATIC items, from compact S7-1200 to system-class S7-1500, plus the legacy S7-300 fleet and LOGO! 8 relay logic (all together in the Siemens PLC section). The second direction is Siemens frequency inverters: current SINAMICS V20 and G120 alongside MicroMaster 420/430/440, plenty of which are still in circulation on operating lines. Soft starters — the SIRIUS 3RW30, 3RW40 and 3RW44 series in the Siemens soft starters section. SIMATIC HMI operator panels of the Basic and Comfort lines live in the Siemens operator panels section. Plus a small group of industrial Siemens SITRANS sensors: pressure, level, flow. Everything listed is actually in our catalogue. The high-runner series are mostly in stock, heavy frame sizes and rare variants are made to order.

SINAMICS frequency inverters: which series for which task

In our Siemens drive catalogue there are three current directions and one legacy line. SINAMICS V20 is the basic machinery drive: scalar control and simple sensorless vector, compact housing, minimal parameters to start. It goes on conveyors, small pumps and fans, simple machine tools — where you need to "turn a mechanism" at stable torque and don't need positioning accuracy. SINAMICS G120 is the universal industrial platform: modular architecture (power module PM + control unit CU), full vector control with or without encoder, built-in STO safety function, optional energy-saving profiles for pumps and fans. It is the drive that goes on most machine-building and process tasks. Siemens' global portfolio has a compact G120C and V90 servo drives in the same family, but those are not in our catalogue at the moment. If you specifically need a G120C or V90, ask the manager about a made-to-order supply.

MicroMaster 420/430/440 is the previous generation. Siemens has discontinued it, but on operating sites these drives are still abundant. MicroMaster 440 is the most capable of the three: vector control, brake chopper, extended protections. The 430 is tuned for pump/fan applications, the 420 is the base unit. If you have a MicroMaster on the line and need a like-for-like replacement, we stock some frame sizes. If the line is being modernised, moving to the G120 is the more sensible path, but you need to account for the difference in parameters and terminal layout. Before sizing we clarify: what load torque (constant or quadratic), whether the motor has an encoder, whether STO is needed in the safety circuit, whether there will be a braking resistor.

SIMATIC PLCs and SIMATIC HMI panels: which controller and which panel, when

Our logic for picking a Siemens controller goes like this. Small logic — timers, counters, interlocks, simple pump-station or lighting automation — is LOGO! 8: cheap, quick to program in LOGO! Soft Comfort, no TIA Portal needed. A compact machine with a fixed set of inputs/outputs — S7-1200: the entry-level industrial PLC of the SIMATIC line, built-in Ethernet/PROFINET, motion functions for one- and two-axis tasks. A complex system, a process installation, coordinated motion, a large channel count and a tight cycle requirement — S7-1500: a faster processor, extended diagnostics, SCADA integration. S7-300 Siemens has withdrawn from active sales, but on operating sites it is still abundant; we keep stock for replacement and expansion of already installed systems.

The link to the drive: SIMATIC controls SINAMICS over PROFINET or PROFIBUS with standard telegrams (telegram 1, 352 etc.). TIA Portal has ready blocks and wizards for it. That is a standard scenario, not a workaround. The operator panel is selected by diagonal and visualisation scope: for a local machine panel a SIMATIC Basic Panel is enough (KTP series, key or touch, 4-15"); for full SCADA-grade line visualisation with trends, recipes and archives a SIMATIC Comfort Panel is taken (4-22", built-in PROFINET, WinCC support). If controller, drive and panel are all Siemens, integration takes less time: everything is engineered in one TIA Portal and library versions are aligned.

Field notes: where Siemens genuinely fits, and where it's overpay

From what we see, Siemens means predictability and long-lived support — not "the most reliable hardware in the world at any price". G120 and SIRIUS have been in our turnover for years, failures at the level expected for the class, the siemens.com documentation is detailed down to individual parameters, firmware and service are available. One practical point worth remembering: the compact SINAMICS and MicroMaster housings hold their rated life only if the thermal regime is respected. In a dusty cabinet with no clearance between devices the drive will run hotter and degrade faster than the datasheet says. That is not a brand defect, it is physics, but it is often forgotten when the cabinet is laid out.

Siemens fits where the site follows a corporate standard and the spec names a specific brand that an analogue won't pass review. Where the project is infrastructural and long-lived (water utilities, power, large buildings, transport) and availability of spare parts and firmware decades out matters. Where the installation requires drive, PLC and HMI to be of one TIA Portal ecosystem and guaranteed compatible. Where the operations team is already trained on Siemens and doesn't want to retrain. It becomes overpay when a G120 is bought for a simple pump "because it's Siemens" while neither the spec nor the ecosystem calls for it. In that case INVT or Veichi will cover the task for less, and we say so plainly. Useful comparison material nearby: comparison of Siemens and Mitsubishi frequency inverters.

What to check before buying Siemens in Ukraine

The checklist we go through with the customer before ordering Siemens:

1. The right group and series for the task. Not "SINAMICS" in general, but specifically a V20 or a G120: different classes and prices. For PLCs: LOGO!, S7-1200 or S7-1500 — also three different tiers. For soft starters: 3RW30, 3RW40 or 3RW44.

2. The overload class for the inverter. Heavy Duty (constant torque: conveyors, hoists) or Light/Normal Duty (pumps, fans). This drives the frame-size choice: for a quadratic load you can take a drive one frame size down, for constant torque you can't.

3. Compatibility of SINAMICS, SIMATIC and HMI. Which protocol (PROFINET or PROFIBUS), which telegram, which TIA Portal and module firmware version, whether there are ready libraries for your "drive+PLC" pair. If it's all Siemens, simpler. But you still need to check TIA Portal versions: a project made in a newer version won't open in an older one.

4. Braking resistor or module. For dynamic applications (hoists, centrifuges, frequent braking) it's a separate item: the G120 uses an external resistor on the built-in chopper, the MicroMaster 440 the same. Easy to leave out of the spec.

5. Service and spares. For premium kit this is critical. Check the repair lead time for your series and spare-part availability: for high-runner V20, G120, S7-1200, LOGO! 8 spares are available quickly; for discontinued kit (MicroMaster, S7-300) and rare variants the lead times are longer.

6. Stock availability. High-runner SINAMICS V20 and G120 in base frame sizes, S7-1200, LOGO! 8, SIRIUS 3RW40 are mostly in stock. Heavy frame sizes, S7-1500, MicroMaster for replacement, large-diagonal Comfort Panels are usually made to order — allow time for delivery.

7. Documentation. Before installation pull the manual from siemens.com for exactly your unit version: with Siemens there are differences in parameters and telegrams between series sub-versions and between firmware versions.

Not sure which line fits your site — message the manager: the motor power, the load type and what exactly you need (drive only; drive + PLC + HMI; soft starter; sensors). We'll suggest a specific series and tell you what's in stock. Useful material nearby: frequency inverter setup, frequency inverter repair, fault codes of ABB, Danfoss, INVT, Schneider frequency inverters.