Manual R06-201618 / 172
ROTARY INDEXING TABLE CONTROLLER EF2...B
COMPONENT DESCRIPTIONS | 3.1 Power Modules PM240-2
3 COMPONENT DESCRIPTIONS
3.1 Power Modules PM240-2
The power modules are designed as follows:
• Mains-side diode rectifier
• DC-link electrolytic capacitors with pre-charging circuit
• Output inverter IGBT
• Braking chopper for (external) braking resistor
• 24 V DC / 1 A power supply
• Gating unit, actual value acquisition
• Fan to cool the power semiconductors
The power modules cover a power range from 0.37 kW to 3.0 kW (versions without line filter).
3.1.1 Safety instructions
Electric shock
After all voltages have been disconnected, a hazardous voltage may still be present in the power unit for up to 5
minutes. The cover for the terminals may only be opened after this time has elapsed.
The DC-link discharge time must be legible on the component in the corresponding national language.
Damaged components may not be operated further. Non-observance can result in damage and accidents.
The drive components generate high leakage currents in the protective conductor. The components must only be
operated in cabinets or in closed electrical operating areas and must be connected with the protective conductor. In
order to provide protection against electric shock, the protective conductor connection on the cabinet or machine
must be implemented in accordance with one of the following measures:
- Fixed connection and protective conductor connection with cross sectional areas ≥ 10 mm
2
Cu or ≥ 16 mm
2
Al
- Stationary connection and automatic shutdown of the power supply if the protective conductor is interrupted
Ground / Protective ground
The power module housing must always be grounded. If the power module is not correctly grounded, then extremely
hazardous states can develop which, under certain circumstances, can result in death.
Connection authorization
Power modules have been designed for use in industrial environments and generate current harmonics on the mains
side as a result of the rectifier circuit.
When connecting a machine with integrated power modules to the public low-voltage line supply, authorization is
required in advance from the local power supply company (utility company) if:
- the rated input current of the machine ≥ 16 A per conductor, and
- the rated input current of the machine does not comply with the requirements specified in EN 61000-3-2 regarding
current harmonics.
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