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SINAMICS G120P Cabinet converter cabinet units are characterized by their modular and service-friendly design.

A wide range of options is available depending on the cabinet version, which permits optimum adaptation of the drive system to the respective requirements (see section Options).

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Example of design of a SINAMICS G120P Cabinet converter cabinet unit, version A with PM330 Power Module and CU230P-2 Control Unit

 

Basic design of a SINAMICS G120P Cabinet converter cabinet unit with PM330 Power Module and several significant options

Coated modules

The following converter components are equipped as standard with coated modules:

• Power Modules
• Control Units
• Intelligent Operator Panel IOP

The coating on the modules protects the sensitive SMD components against corrosive gases, chemically active dust and moisture.

Nickel-plated busbars

All of the busbars used in the converter cabinet are nickel-plated in order to achieve the best possible immunity to environmental effects. Further, the bare copper connections do not have to be cleaned for customer connections.

Note:

For some options, for technical reasons, parts of the copper busbars cannot be nickel-plated.

EMC shielding busbars and PE busbars

The Cabinet Modules are delivered with a EMC shielding busbar and a PE busbar as standard. The EMC shielding busbar is used to connect shielded power cables for line and motor supply cables. The PE busbar is used to connect and secure PE cables.

Crane transport aids

The converter cabinet units are supplied with a crane transport aid mounted on the top. In the case of single cabinets up to a width of 1200 mm (47.2 in), transport eyebolts are provided to transport the unit by crane. Transport rails are used with cabinet widths >1200 mm (47.2 in) or for several cabinets (e.g. option L01). Rope spreaders should be used for low crane hook heights.

Degrees of protection of cabinet units

The EN 60529 standard covers the protection of electrical equipment by means of housings, covers or equivalent, and includes:

• Protection of persons against accidental contact with live or moving parts within the housing and protection of the equipment against the ingress of solid foreign bodies (touch protection and protection against ingress of solid foreign bodies)
• Protection of the equipment against the ingress of water (water protection)
• Abbreviations for the internationally agreed degrees of protection

The degrees of protection are specified by abbreviations comprising the code letters IP and two digits.

Degrees of protection of the converter cabinet unit	First digit (touch protection and protection against ingress of foreign solid matter)	Second digit (protection of the equipment against the ingress of water)
IP20 (standard)	Protected against solid foreign bodies with a diameter ≥ 12.5 mm (≥ 220 in).	No water protection
IP21 (option M21)	Protected against solid foreign bodies with a diameter ≥ 12.5 mm (≥ 220 in).	Protected against drip water Vertically falling drip water shall not have a harmful effect.
IP23 (option M23)	Protected against solid foreign bodies with a diameter ≥ 12.5 mm (≥ 220 in).	Protected against spray water Water sprayed on both sides of the vertical at an angle of up to 60° shall not have a harmful effect.
IP43 (option M43)	Protected against solid foreign bodies with a diameter ≥ 1 mm (≥ 0.04 in).	Protected against spray water Water sprayed on both sides of the vertical at an angle of up to 60° shall not have a harmful effect.
IP54 (option M54)	Dust protected. Ingress of dust is not totally prevented, but dust must not be allowed to enter in such quantities that the functioning or safety of the equipment is impaired.	Protected against splash water Water splashing onto the enclosure from any direction shall not have a harmful effect.

Intelligent Operator Panel IOP

The IOP (Intelligent Operator Panel) is mounted in the door of the cabinet units. It is used to operate and commission the drive system. The IOP is an extremely user-friendly, powerful operator panel.

The IOP supports both entry-level personnel and drive experts. Thanks to the large plain text display, the menu ing and the application wizards, it is easy to perform commissioning. A drive can be essentially commissioned without having to use a printed parameter list – as the parameters are displayed in plain text, and explanatory help texts and the parameter filtering function are provided.

Application wizards interactively guide you when commissioning important applications such as pumps and fans. There is a basic commissioning wizard for general commissioning.

The drives are easily controlled manually using directly assigned buttons and the navigation wheel. The IOP has a dedicated switchover button to switch from automatic to manual mode.

The converter can be diagnosed in a user-friendly fashion using the plain text display of faults and alarms. Help texts can be obtained by pressing the INFO button. Up to two process values can be graphically visualized and up to four process values can be numerically visualized on the status screen/display. Process values can also be displayed in technological units.

The IOP supports standard commissioning of identical drives. For this purpose, a parameter list can be copied from a converter into the IOP and downloaded into other drive units of the same type as required. This functionality is available only if a memory card is installed in the Control Unit.

The IOP supports the following languages ¹⁾: German, English, French, Italian, Spanish, Portuguese, Dutch, Swedish, Russian, Czech, Polish, Turkish, Finnish.

If option D91 is selected, in the factory, an IOP containing the Chinese, English and German languages is integrated into the cabinet door of the converter.

The operating temperature of the IOP is 0 to 50 °C (32 to 122 °F).

¹⁾ Further information is available at 
https://support.industry.siemens.com/cs/document/67273266

Communication with higher-level control and customer terminal block

Depending on the selected CU230P‑2 Control Unit, the following interfaces for communication with the higher-level control system are provided:

• PROFINET, EtherNet/IP (option K96)
• PROFIBUS (option K97)
• USS/Modbus RTU/BACnet MS/TP, FLN P1 (option K98)

The Control Unit can be connected to the higher-level control via its digital inputs and outputs.

Open-loop and closed-loop control functions

The converter control contains a high-quality, sensorless vector control with speed and current controls as well as motor and converter protection.

Software and protective functions

The software functions available as standard are described below:

Software and protective functions	Deion
Setpoint input	The setpoint can be input both internally and externally. It is applied internally as a fixed setpoint, motorized potentiometer setpoint or jog setpoint and externally via the communications interface or an analog input on the customer terminal block. The internal fixed setpoint and the motorized potentiometer setpoint can be switched over or adjusted using control commands from any interface.
Motor identification	The automatic motor identification function makes commissioning faster and easier and optimizes closed-loop control of the drive.
Ramp-function generator	An advanced ramp-function generator with separately adjustable ramping times, together with adjustable rounding times in the lower and upper speed ranges, allows the drive to be smoothly accelerated and braked. As a consequence, this avoids the drive train from being overloaded and reduces the stress on mechanical components. The down ramps can be parameterized separately for quick stop.
Vdc max controller	The Vdc max controller automatically prevents overvoltages in the DC if the set down ramp is too short, for example. This may also extend the set ramp-down time.
Kinetic buffering (KIP)	In the event of supply voltage dips, the kinetic energy of the rotating drive is used to buffer the DC so as to prevent fault trips. The converter remains operational as long as the drive can provide regenerative energy as a result of its motion and the DC voltage does not drop below the trip threshold. When the line supply recovers within this time, the drive is again accelerated up to its setpoint speed.
Automatic restart1)	The automatic restart switches the drive on again when the power is restored after a power failure, and ramps up to the current speed setpoint.
Flying restart1)	The "Flying restart" function allows the converter to be switched to a motor that is still turning.
Technology controller	The technology controllers (in the form of PID controllers) can be used to implement simple closed-loop control functions. A PID controller controls the motor speed as a process controller for temperature, pressure, air quality or fill levels. Three further PID controllers are freely programmable. The P, I, and D component can be disabled.
Free function blocks	Using the freely programmable function blocks, it is easy to implement logic and arithmetic functions for controlling the SINAMICS G120P Cabinet unit. The blocks can be programmed by means of an operator panel or the STARTER commissioning tool.
I²t detection for motor protection	A motor model stored in the converter software calculates the motor temperature d on the current speed and load. More exact sensing of the temperature, which also takes into account the influence of the ambient temperature, is possible by means of direct temperature sensing using KTY sensors in the motor winding.
Motor temperature evaluation	Motor protection by evaluating a temperature sensor of type KTY, PTC, Pt1000 or bil NC contact. When a KTY sensor is connected, the limit values can be set for warning or shutdown. When a PTC thermistor is connected, the system reaction to triggering of the thermistor (alarm or shutdown) can be defined.
Motor blocking protection	A blocked motor is detected and protected against thermal overloading by a fault trip.
Multi-zone control	Closed-loop control of a zone with up to 3 sensors for pressure or temperature, or closed-loop control of two independent zones each with one sensor.
Essential service mode	Special converter operating mode that enhances the availability of the drive system in the event of a fire.
Bypass 2)	When the setpoint is reached or a fault occurs, there is a changeover to mains operation.
Cascade connection 2)	Load-dependent connection and disconnection of a maximum of three additional motors by the converter in order to provide a largely constant output power.
Hibernation mode	Startup or shutdown of the drive when the relevant value drops below an external setpoint or the internal PID controller setpoint