Johnson Controls METASYS TC-9102 Series Technical Bulletin page 13

0 to 10 VDC
Control Signal
H ea ting
100
0
10
5
The output is a control signal for driving a fan speed controller with an
opto-isolated 0 to 10 VDC input. As the output voltage increases, the fan
speed controller must increase the speed of the fan from the minimum
speed of the fan motor to its maximum speed. When the output is below
the voltage required for the minimum speed, the fan must be switched
off.
12 1 4 16 18
Figure 12: 0 to 10 VDC Fan Control Signal
C oo lin g
M inim um
Spe ed Level
20 22 24 26
R oo m
T e m pe rature (°C )
30
Technical Bulletin—TC-9102
tc2facos
13