Siemens

Professional Repairs of Siemens Parts

We specialise in repairing obsolete parts which aren't supported or serviced by manufacturers anymore. We repair and then test obsolete parts for SIMATIC S5/S7, SIMOREG, SIMODRIVE, SIMOTION, SINAMICS, SINUMERIK, TELEPERM, ISKAMATIC and so on. We keep stocks of tens of thousands of parts, so we can also offer Repair by Exchange.

Our repaired parts come with a warranty of up to 24 months.

Parts that we commonly repair:

PLC/CNC Control Systems

We repair such obsolete parts as SIEMENS SIMATIC S5/S7 and SINUMERIK:

  • SIEMENS SIMATIC S5-90U, S5-95U, S5-100U, S5-115U, S5-135U, S5-155U, S5-110U, S5-130U and S5-150U,
  • SIEMENS SIMATIC 305 PLC, 405 PLC and 505 PLC,
  • SIEMENS SIMATIC S7-200, S7-300, S7-400 and S7-1200,
  • SIMATIC PG,
  • SIEMENS SINUMERIK 805, 810T, 810M, 810D, 820, 830, 840C, 840D, 850 and 880.
    • PLC testing

      If possible, all the connections of the repaired part are tested.

      The connections include:

      • analogue inputs and outputs,
      • temperature inputs,
      • power supply,
      • bus system,
      • communication connections.

      With CPUs the following tests are carried out:

      • memory test by loading a program,
      • memory test by disconnecting power,
      • inspection of the input and output modules / communication modules that are connected to the processor, etc.

      CNC testing:

      • testing communication connections,,
      • testing memory parameters,
      • testing IO modules, if installed,
      • testing monitors in combination with the control unit,
      • testing safety boards,
      • endurance tests,
      • testing extra encoder input connections using an encoder simulator.
      • Repairs for fixed prices, which you know in advance,
      • preventative replacement of time-critical components included in the repair,
      • repairs within 4–6 weeks,
      • thorough load testing,
      • free collection of your faulty part.

      What is more:

      • We have extensive experience with repairs.
      • We collaborate with world's leading service centres.
      • Our quality management system is certified to ISO 9001:2015.

      Besides that, we can take you on a guided tour of a service centre so that you can see for yourself how parts are repaired.

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    SIMODRIVE 611 and SIMOTION

    UNIS Group invested heavily in a new professional testing centre. SIMODRIVE 611 modules and SIMOTION control systems belong to parts that are repaired most often. We usually repair these series – 6SN1118..., 6SN1123..., 6SN1130..., 6SN1145… and 6SN1146..

    High power modules usually undergo load testing for 3–7 days. This is one of the reasons why we're confident that our repaired modules are 100% functional and why they come with a warranty of up to 24 months.

    • Testing repaired modules

      When repairing SIMODRIVE 611 modules, we don't only replace faulty components, but we also preventatively replace time-critical components, which tend to break easily. We test repaired modules to the maximum load (up to 110 kW) for a period of 3–7 days nonstop. This shows the stability and quality of the module. For each test, a report detailing the testing process is generated. We'll be happy to send the report to you.

      SIMODRIVE module express repairs

      Although we provide express repairs of SIMODRIVE modules within 3–5 days, for the module to be thoroughly tested we recommend a standard repair of 4 weeks. It's sometimes the case that while being tested a module reports an error after 3 days. It's thus checked again, repaired and endurance tested until it passes the test.

      SIMODRIVE 611 in stock in Liberec

      We stock the most commonly used control and high power modules. High power modules are tested for several days. For high power modules, we can also provide reports detailing the load testing which the modules have undergone. We offer both new and used modules for replacement. Used modules are repaired and tested in the UNIS Group service centre in the Netherlands.

      • repairs for fixed prices, which you know in advance
      • preventative replacement of time-critical components included in the repair repairs within 4–6 weeks
      • thorough load testing
      • free collection of your faulty part

      What is more:

      • We have extensive experience with repairs.
      • We collaborate with world's leading service centres.
      • Our quality management system is certified to ISO 9001:2015.

      Besides that, we can take you on a guided tour of a service centre so that you can see for yourself how parts are repaired.

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    SIEMENS Operator and HMI Panel Repairs

    We have extensive experience with operator and HMI panel repairs. We repair faulty monitors, non-functional touch controls, faulty keyboards/keypads, damaged protective films, non-functional ports, broken plastic covers and so on. Panels can be completely reconditioned. And of course, they're thoroughly tested.

    Are you looking for an obsolete HMI panel which isn't manufactured anymore? Send us an enquiry. We stock hundreds of outdated HMI panels which you won't get anywhere else.

    • The testing of repaired panels includes:

      • testing buttons and the touch screen
      • testing the monitor
      • testing communication connections
      • testing IO modules (if installed)
      • controls calibration
      • repairs for fixed prices, which you know in advance
      • preventative replacement of time-critical components included in the repair 
      • repairs within 4–6 weeks
      • thorough load testing
      • free collection of your faulty part

      What is more:

      • We have extensive experience with repairs.
      • We collaborate with world's leading service centres.
      • Our quality management system is certified to ISO 9001:2015.

      Besides that, we can take you on a guided tour of a service centre so that you can see for yourself how parts are repaired.

    • * Required fields

    Drive and Frequency Inverter Repairs – MICROMASTER, MIDIMASTER, SIMOVERT, SIMOREG, SINAMICS and SIMOTION

    One of the devices on the shop floor that is most susceptible to breakdown is a variable frequency drive. As time goes by, it tends to stop working properly and needs to be repaired or replaced. Finding a modern replacement for an obsolete frequency drive can often be complicated, so it pays to repair it.

    • UNIS Group has been repairing frequency drives and soft starters for a long time. It has extensive experience with repairing various brands, types and series, from the most obsolete to the latest models.
      The service centre boasts testing systems for testing more frequency drives at a time as well as one by one. It also features a sophisticated testing system that allows testing under high and continuous power, up to 110 kW. Repaired frequency drives and soft starters come with a warranty of up to two years.

      The testing of frequency drives and soft starters includes:

      • testing communication connections,
      • testing operator panels (if installed),
      • testing digital and analogue control inputs,
      • Simodrive 611 modules undergo a three-day endurance test under high, and continuous power (up to 110 kW). This test is carried out to make sure that repaired modules are fully functional.
      • Repairs for fixed prices, which you know in advance,
      • preventative replacement of time-critical components included in the repair,
      • repairs within 4–6 weeks,
      • thorough load testing,
      • free collection of your faulty part.

      What is more:

      • We have extensive experience with repairs.
      • We collaborate with world's leading service centres.
      • Our quality management system is certified to ISO 9001:2015.

      Besides that, we can take you on a guided tour of a service centre so that you can see for yourself how parts are repaired.

    • * Required fields

    Servo Motor Repairs

    We repair faulty servo motors in a service centre which repairs over 4,500 servo motors a year, with a success rate of 97%. Repaired servo motors are delivered within 2–3 weeks of collecting them from the customer.

    • Servo motor repair is the only type of repair where we aren't able to tell you the price for the repair in advance. In the majority of cases, we only need to clean the motor and replace bearings. Sometimes we need to replace the encoder or brake, or recondition the whole shaft. In short, the motor has to be taken apart. Only then – when we've found out what exactly needs to be repaired – can we send you our price quote.

      After repair, motors undergo thorough testing. We have over 100 testing systems that allow for motors to be tested to the maximum load.

      How are servo motors repaired?

      • Your servo motor is first cleaned in a special way. This ensures that grease and grime are removed from it.
      • When the motor has been dried, it's handed over to our technical personnel. They diagnose faults and replace faulty components.
      • If it's the encoder that doesn't work, it's either repaired or replaced.
      • The repaired motor is then thoroughly tested to the maximum permitted load, if possible.
      • Each repair comes with a report detailing the work and testing carried out during the repair. If requested, we can send it to you.
      • If the motor passes all tests, it's carefully packed and ready to be shipped.

      All our servo motor repairs come with a six-month warranty.

      Servo motor repairs include:

      • incremental and absolute encoder repair and testing
      • encoder adjustment
      • inspection and repair of commutator sensors
      • commutator sensors adjustment
      • encoder memory reset
      • magnetic field inspection and testing
      • brake inspection
      • braking torque inspection
      • inspection and replacement of bearings
      • shaft inspection
      • inspection and replacement of press rings
      • refurbishment of mechanical parts
      • cleaning of all servo motor components
      • insulation check
      • inspection of connectors
      • inspection of the winding
      • stator rewinding
      • preventative replacement of time-critical components included in the repair

      • repairs within 4–6 weeks

      • thorough load testing

      • free collection of your faulty part

      What is more:

      • We have extensive experience with repairs.

      • We collaborate with world's leading service centres.

      • Our quality management system is certified to ISO 9001:2015.

    • * Required fields

    TELEPERM, ISKAMATIC and Other Parts

    We repair such parts as SIEMENS TELEPERM and ISKAMATIC – TELEPERM C, TELEPERM M, TELEPERM ME and TELEPERM XP. We stock thousands of TELEPERM parts that aren't supplied by the manufacturer anymore.

    In addition, we repair some other SIEMENS parts:

    • motherboards, modules and CPUs,
    • input/output modules,
    • industrial keyboards and monitors,
    • industrial computers,
    • and other parts.

    Repaired parts come with a warranty of up to 24 months.

      • Repairs for fixed prices, which you know in advance,
      • preventative replacement of time-critical components included in the repair,
      • repairs within 4–6 weeks,
      • thorough load testing,
      • free collection of your faulty part.

      What is more:

      • We have extensive experience with repairs.
      • We collaborate with world's leading service centres.
      • Our quality management system is certified to 9001:2015.

      Besides that, we can take you on a guided tour of a service centre so that you can see for yourself how parts are repaired.

    • * Required fields

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