SETTINGS - RELAY SPECIAL FUNCTIONS
r 2 h e i z s t a b
2
Z W
= E I N P N = E I N
R2 or R3 - 2nd heating element - Temperature changeover via PT1000
The "2nd heating element" function is only active if a temperature sensor is
connected to the PT1000 input. The relay switches on when the set changeover
temperature of the sensor is reached and switches off again when the temperature
falls below this by 2°C. This offers the possibility of switching between two heating
rods at the analogue output by means of a temperature sensor. This offers the
possibility of switching between 2 heating elements at the analogue output by
means of the temperature sensor (e.g. boiler-buffer switchover, heating element
above - heating element below). Only the setting P is required for the relay; the
nominal output of the second heating rod must be stored here and the changeover
temperature must be defined.
Heater rod 2
Heater rod 1
60°C
∆ =
2°C
58°C
Temperature sensor
PT1000
Settings
heating rod2
Switching temperature=60°C
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