VMB4RY with "or" function


I’m planning to control our Central Heating system and have following question: I have 3 pumps to drive and 1 heater unit. Eveytime one of the pumps (or a combination) is turned on, the heater should turn on. Switching could be done by 1 VMB4RY, but I cannot figure out if ex. relay 4 can be activated from the Velbus Controls, everytime one of the relays (1 to 3) are activated.

Or is the only way out, a hardwired “or” function from the relays 1-3 to a separate relay?

Many thanks,

Hans Dierickx

This is possible with firmware rev 0817 or higher it’s possible to do that.
We are just working on a PC software update to configure this option.