Instruction Manual

THREE
EASY
STEPS
STEP 3 - (continued)
In the f
ollowing graphic, the binary loads are switched ON and OFF to match the heat demand.
Lay a str
aightedge ver
tically at an
y position of the control input voltage and find e
xactly which stages
are ON or OFF. The SCR modulating step fills the gap between the fixed steps at all times.
Hybrid Binary Load Diagram
Q4
Q3
Q3
Q2
Q2
Q2
Q2
Q1
10 V7.5 V5 V2.5 V0 V
Q1
Q1
Q1
Q1
Load
Total Load
Q4
Q3
Q2
Q1
SCR Output Q5
Relay ON / OFF
Binary Outputs
The SCR Output
fills the gap between
the fixed steps
Control Signal Input
Q1
Q1
Q1
2
/16
4
/16
6
/16
8
/16
10
/16
12
/16
14
/16
16
/16
1
0
1
0
1
0
1
0