18Room thermostat (for switch-off of heating circuits)If a room thermostat, used to switch off the heating, should be connected, a switchingcontact must be placed between the sensor ground and a free input terminal (17-26).When assigning the terminal (called “system” main switch in the heating circuit), thisinput terminal is configured automatically as a contact signal input. As long as thecontact is closed (room is still too cold), the heating program will remain in automaticoperation. When the contact opens, the heating circuit changes to switch-offoperation. In this case no temperature demand is calculated; only the frost protectionfunction is active.2.2.4 0…10V (Universal terminals)17Sensor groundSensor NN1618 Sensor L 1519 Sensor Potential for 13 1420 Sensor Relay 1321 Sensor Not used 1222 Sensor Relay 1123 Sensor Potential for 9+11 1024 Sensor Relay 925 Contact / counter Not usedPE826 Contact / counter Relay 727 0…10 V Potential for 5+7 628 0…10 V Relay 529 Sensor ground Not used 430 Not used Relay 331 Not used Potential for 1+3 232 Not used Relay 1Fig. 2.9:Connection of 0..10V inputs or outputsThe HPM has two 0...10 V universal terminals. These can be used as inputs oroutputs, individually. Please refer to the operating manual for further information.Componentsending orreceiving0…10 V