When the cabinet needs C2 EMC compliance, do I add an external filter?

Dedicated industrial supplies — water-treatment buildings, HVAC plant rooms — fall under EMC Category C2. This unit ships with the C2 filter built in and tested at the factory, so there is no external filter module to source or wire — an unfiltered variant would push that cost and a commissioning step onto your build.

Does my PROFIBUS DP network connect without a gateway?

PROFIBUS DP is onboard, so the drive drops onto an existing Profibus network as a standard node — no communications gateway. For industrial Ethernet use the PROFINET/EtherNet/IP variant; for serial or building buses use the USS/Modbus/BACnet variant.

What overload rating applies to pump and fan duty?

Pump and fan loads are variable-torque, so the drive is rated at Low Overload: 110% of rated current for 60 s. At 1.1 kW that is 3.0 A continuous with short-term headroom for start-up surges, in a 73 x 232 x 209 mm IP20 frame that mounts directly in the cabinet.