SystemAir RS Series - Page 29

EC-Vent
Demand control for up to 5 external sensors, 2 fans, damp-
ers, heaters and coolers.
The EC vent system has 2 units. The control board (CB) and
the room unit (RU). Connect the fan to the control board and
remove the internal potentiometer.
EC-Vent
IN/RPM
PWM
IN/10V
OUT/PWN
GND
TACH
optional
+10V
0...10V/PWM
GND
Control Board (CB)
W -
Y +0-10V
Br + 24VDC
NC
C
NO
GND
+24VDC
E
C
B
D
A
N L 1
(tach output)
2 (GND) 3 (PWM) 4 (+10VDC) 2 (+24VDC) 3 (0-10V) 1 (GND) + DC MAX 24V I max 50mA 5 (GND) 6 (0-10V) 7
F
G
H
I
CMN
NC
NO
MODBUS INTERNAL
GND
IN/10V
OUT/PWM
IN/RPM
24V
D
A
GND
24V
D
A
GND
24V
D
A
GND
RU
DEBUG
USB
J
K
ALARM FAN OUT3 OUT2 OUT1
GND
A/D
PT1000
24V
GND
A/D
PT1000
24V
GND
A/D
PT1000
24V
N out
N in
L out
L in
IN3 IN2 IN2
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