Siemens SINAMICS S120 Equipment Manual page 52

Power Modules
3.1 Description
Characteristics of the Power Modules
• Version for 380 V 3 AC to 480 V 3 AC from 210 A to 490 A
• Suitable for TN, TT, and IT supply systems
• Liquid cooling
• Short-circuit/ground-fault-proof
• Electronic rating plate
• Operating status and error status via LEDs
• DRIVE-CLiQ interface for communication with the Control Unit and/or other components
in the drive line-up.
• Integration in system diagnostics
• The Power Modules communicate with the higher-level Control Unit via DRIVE-CLiQ. The
Control Unit in this case could be a CU310 or CU320 or a SIMOTION D Control Unit.
• An external 24 V DC supply is required to operate liquid-cooled Power Modules.
• The correct line reactor must be connected in series to achieve category 3 EMC
conformance in accordance with EN 61800.
The volumetric flow of the coolant is monitored by the software. If the volumetric flow is
continuously lower than the setpoint, an alarm (A5005) is first displayed. If this alarm
remains active continually for the next 5 minutes, a fault message (F30047) is activated
which shuts down the unit.
The fans for the internal electronic circuitry are only switched on when required.
The fans are switched on and off as a function of several factors (e.g. heat sink temperature,
ambient temperature, output current, duty cycle, ...) which means that fan operating cycles
cannot be calculated directly.
3-2
SINAMICS S120 Equipment Manual, Edition 12/2007, 6SL3097-2AM00-0BP4
Chassis Power Units Liquid Cooled