Siemens SINAMICS S120 Equipment Manual page 106

Motor Modules
5.1 Description
Characteristics of the Motor Modules
• Version for 510 V DC to 720 V DC from 210 A to 1405 A
Version for 675 V DC to 1080 V DC from 100 A to 1270 A
• 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
• An external 24 V DC supply is required to operate liquid-cooled Motor Modules.
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.
5-2
SINAMICS S120 Equipment Manual, Edition 12/2007, 6SL3097-2AM00-0BP4
Chassis Power Units Liquid Cooled