Graphical display with 4 lines. Software class A. RS232 output for modem connection. Data storage period: 5 years. 6-module DIN housing. Two weekly programs with three time bands per day. A daily program with three time bands. Clock charge lifetime: 5 years. Measurement range of external probe: -30. . +40°C. Measurement range of delivery/limit/auxiliary probe: 0. . +99°C. Maximum 20 slaves can be connected. Electric featuresPower supply: 230Vac. Consumption: 5 VA. 4 output relays: mixing valve and pump, boiler with multistage burner (from 2 to 4), boilers in cascade (2 to 4) with choice of main boiler rotation, 2 cascade boilers with two-stage burner with choice of main boiler rotation. 2 digital inputs can be used as alarms. 1 4. . 20mA input can also be used to drive the configurable relay. 1 output 0. . 10V (3mA maximum load) with proportional regulation. 1 configurable relay (auxiliary probe – 4. . 20mA sensor). Contacts rating: 5A – 250Vca (resistive load).