Frequency Inverters H-Max™

The specialist for pumps and fans in buildings



 The special characteristics of the frequency inverter H-Max™ make it ideal for applications in the heating, ventilation and air-conditioning field (HVAC). Features such as RS485 and Ethernet are onboard in these variants enabling the relevant BACNet and Modbus networking protocols used in this field.

Important functions for applications in this field are provided by 2 PID controllers, function blocks for switch on and off of variable speed motors as well as defined behaviour during a fire. An internal RFI filter as well as a dc-link reactor simplify implementation of EMC-compliant design.

Diverse options complement the comprehensive basic configuration of the H-Max™. The inverter is available in IP21 and IP54 enclosure versions for motor ratings from 1.1 to 160 kW.

System features

  • integrated RFI filter (EMC: C2 and C3 compliant to IEC/EN61800-3) and DC choke
  • Graphic display with comprehensive functions
  • Degree of protection IP21 or IP 54
  • Ethernet on board (Modbus/TCP / BACnet/IP)
  • Serial interface RS485 onboard (Modbus RTU / BACnet MS/TP)
  • 2 expansion slots for options cards (e.g. fieldbus)
  • integrated braking chopper
  • 2 PID controllers
  • 6 digital control inputs (24 V DC)
  • 1 digital output (transistor, 24 V DC, 50 mA)
  • 2 analog inputs (0…±10 V DC / 0/4…20 mA)
  • 1 analog output (0…+10 V DC / 0/4…20 mA)
  • 3 relays (1x N/O, 2x C/O, 230 V AC, 8 A)
  • international standards (CE, UL, cUL, c-Tick).

Rating range

3~ (208 … 240 V, -15 % …+ 10 %, 45 … 66 Hz) 0,55 … 90 kW
3~ (380 … 500 V, -15 % …+ 10 %, 45 … 66 Hz) 1,1 … 160 kW.