Disadvantages of conventional wiring/control

• Analogue data items
• Temperature controlled centrally in the building management system
• Required accessories per pump:
  2 x temperature sensor

System information:

• Pump on/off, feedback missing
• Collective fault signal
• Feed temperature
• Return temperature
• Hours of operation, derived

Disadvantages of conventional cabling

• Lots of cabling work and additional costs
• Analogue control parameters have to be entered separately (e.g. temperature)
• Star-connected wiring of fault and run signals
• High degree of wear due to frequent activation and deactivation of the pumps

Advantages of bus-compatible cabling/control

• Digital data items
• Temperature controlled decentrally in the pump
• Required accessories per pump:
  1 x temperature sensor PT1000-AA, 1 x Wilo CIF module

System information

• Volume flow
• Delivery head
• Operating hours
• Feed temperature
• Return temperature
• Digital inputs
• Operating status of the system
• Heating/cooling quantity
• Fault and run signals including index
• …

Advantages of bus-capable cabling:

• Considerably less cabling work and costs
• Low fire load because of simple cabling
• Decentral control within the pumps
• High energy savings due to needs-based control of the pumps
• Digital processing of data items and queries for virtual data item (e.g. heating/cooling quantity)
• One language between the building management system and all pumps
• Simple commissioning, modular and decentral, via the pump display