© 2006
GE ECM
by Regal-Beloit
- 35 -
Indoor Blower Motors
v0.2
This is a more simplified means of communication that provides infinite control of
airflow by adjusting the PWM signal.
The airflow characterization is stored in the OEM control board.
The motor is programmed with a minimum and maximum airflow range that is
specific to each air moving system.
A PWM signal from the OEM board communicates to the motor what percentage of
the airflow range is needed for each demand.
ECM 2.3
Motor Control
PWM (Duty Cycle)
D
T
+23 V
Control
Board
Pin number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Connected to PWM common
NC*
Connected to PWM common
NC*
NC*
NC*
NC*
NC*
NC*
PWM signal
NC*
NC*
NC*
NC*
Start/Stop signal: 9 - 23VDC
NC*
* Not Connected
Pin number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Connected to PWM common
NC*
Connected to PWM common
NC*
NC*
NC*
NC*
NC*
NC*
PWM signal
NC*
NC*
NC*
NC*
Start/Stop signal: 9 - 23VDC
NC*
* Not Connected
PWM (Duty Cycle)
D
T
The voltage supplied to Pin #15 is the start/stop
signal.
-
The voltage range is 9-23vdc
The PWM signal is supplied to Pin #10.
-
The PWM signal (duty cycle) itself cannot be
easily measured.
-
The dc voltage on this line can be measured
and used in a formula to determine the demand
output percentage.