Application and function of the Wilo Net interface

Wilo Net is a bus system which enables up to eleven Wilo products to communicate with one another.

Application for:

Double pumps consisting of two single pumps
Multi-pump system
Gateway
Remote control

Bus topology:

The bus topology consists of multiple stations (pumps), which are switched on in sequence. The stations (pumps) are connected via a shared line.
The bus must be terminated at both ends of the cable. This is done for the two external pumps in the pump menu. All other subscribers should not have activated termination.

All bus subscribers must be assigned an individual address (Wilo Net ID). This address is set in the pump menu of the respective pump.

To terminate the pumps:

In the “Settings” menu, select

“External interfaces”
“Wilo Net setting”
“Wilo Net termination”.

Possible selection:

Wilo Net termination	Description
Switched on	Terminating resistor of the pump is switched on. If the pump is connected at the end of the electrical bus line, “Switched on” must be selected.
Switched off	The pump’s terminating resistor is switched off. If the pump is NOT connected at the end of the electrical bus line, “Switched off” must be selected.

After termination is done, an individual Wilo Net address is assigned to the pumps:

In the “Settings” menu, select

“External interfaces”
“Wilo Net setting”
“Wilo Net address” and assign an address (1-11) to each pump.

Double pump example:

Pump head left (l)

Wilo Net termination: ON
Wilo Net address: 1

Pump head right (II)

Wilo Net termination: ON
Wilo Net address: 2

Example with Multi-Flow Adaptation featuring four pumps:

Primary pump

Wilo Net termination: ON
Wilo Net address: 1

Pump secondary 1:

Wilo Net termination: OFF
Wilo Net address: 2

Pump secondary 2:

Wilo Net termination: OFF
Wilo Net address: 3

Pump secondary 3:

Wilo Net termination: ON
Wilo Net address: 4