1.6.2 - Unit with Analog Heating (Modulating)
• Disable Digital Output 4 and Digital Output 5 by setting them to “OFF” in their respective dropdown list.
• Select “Heating” in Analog Output 1.
• Select “Proportional”.
Output=0% Output=100%
Setpoint0%
Proportional Band
Demand
Output=0% Output=100%
Setpoint
40%
0%
60%
Proportional Band
Demand
• The setpoint value indicates when the heating is activated, and the proportional value is the 0-100% output range.
• Looking at the modulating heat, with a setpoint of 40% and a proportional band of 60%.
• The Analog Output 1 will begin to increase its voltage when the demand (source: Math 2) reaches 40%. As the heating
demand increases, the voltage output will increase proportionally. Once the demand reaches 100%, the output will be
100%.
• Look at the following example for a 80% heating demand:
Setpoint = 40% Demand = 80%
Proportional Band 60
Voltage output = x 10Vdc = x 10Vdc = 6.67 Vdc
Demand - Setpoint 80 - 40
9-9
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