External fan module

The external fan module combined with the reinforcement plates is employed to provide perfect cooling of a SINAMICS S120 Combi Power Module.

To cool the SINAMICS S120 Combi Power Module, a volumetric flow of air of at least 160 m³/h through the heatsink is required.

The external fan module supplies a maximum volumetric flow of 290 m³/h. This dimensioning ensures an adequate air flow rate, even with a lower supply voltage or with a slightly soiled heatsink.

Due to the encapsulated electronics and the ball-bearing-mounted closed rotor, the fan module can be used even under exacting environmental conditions. The fans are equipped with electronic reverse-polarity, blocking and overload protection systems. To ensure maximum machine availability, the fan speed is monitored. A user alarm is displayed if the fan stops.

Reinforcement plates

It is essential to ensure that the air actually flows through the heatsink. The gap between the fan module and heatsink must therefore be closed. The reinforcement plates must be used for this purpose where possible. The reinforcement plates

• close the gap between the fan module and heatsink
• reinforce the rear wall of the control cabinet for sealed installation
• guarantee ideal ventilation spaces