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Ventus Air Handling Units
Mark
Terminal
number
Description
Control
AN
1
Analog Input; Set value 0-10
V; R
≥
1 k
Ω
GND
2, 5
I/O ground
A
3
Bus connection RS485 - A;
MODBUS RTU
B
4
Bus connection RS485 - B;
MODBUS RTU
Mains
supply
PE
6
PE connection
L
7
Supply voltage
N
8
Fig.21a. Terminal strip of the EC motors 370W
Mark
Terminal
number
Description
Control
AN
1
Analog Input; Set value 0-10 V; R
≥
1 k
Ω
GND
2, 6, 12
I/O ground
Pot
3
Potentiometer output (3 wires)
+5V
4
+5 V ± 5 % / 10 mA for
potentiometer
Speed*
5
Digital output; Speed Output
PWM signal;
f ~ 1.1 kHz; NPN open collector
output
I/O*
7
Option for aditional input/output
funcion
+5V
8
+5 V ± 5 % / 10 mA for switch
and I/O function
Start/
Stop
9
Digital input; Disabling function -
open pin;
Enabling Bridge to +5
V (Pin 9 to Pin 8)
A
10
Bus connection RS485 - A;
MODBUS RTU
B
11
Bus connection RS485 - B;
MODBUS RTU
Mains
supply
PE
13
PE connection
L
14
Supply voltage
N
15
Fig.21b. Terminal strip of the EC motors 750W
