It installs itself, no programming is required. In DIN carrill box of three modules. Control up to 16 zones (8+8) with the same control unit.
< strong>Technical details: Two-wire bus connection input without polarity. Selection of the orientation of the V1-V8 solenoid valves (8 zones). Insulated relay output for ON command /OFF boiler and with N.O/N.C C. 230Vac external power supply. Max power: 3.5W. Dimensions (LxDxH): 89.7x60.7x53.6 mm Weight: 147g.