10
ELECTRICAL DIAGRAMS – EC FANS
One of the vital components for the correct functioning of the ARFIT brand air handling units are the fans, so,
make sure that they are correctly connected according to the following diagrams (Check the fan scheme of the
equipment purchased in the diagrams shown):
- Scheme EC-1 (Image 2):
- Scheme EC-2 (Image 3):
Connection
Description
10V
Voltage output 10V - Imax = 10mA (Terminal 5 flow regulator ARFIT)
GND
Connection for control interface (terminal 3 flow regulator ARFIT)
E1
Analogue input 1 (Control 0 - 10V) (Terminal 4 flow regulator ARFIT)
D1
Digital input 1 (Connect to terminal 2 of the ARFIT flow regulator to enable operation)
A1
Status input (normally open)
A(D-)
RS485 MODBUS
B(D+)
11
Status relay, normally open,
Closes with alarm (2A, 250 VAC)
14
PE
Ground
230 / 1 EN 1:50
(See characteristics on the motor plate)
N
Power - Neutral
L1
Power - Phase
Number Connection Function
1
24V
Voltage output 24 VDC–= 70 mA (Connect to terminal 1 of the ARFIT flow regulator to enable
operation)
2
10V
Voltage output 10 VDC - Imax = 10 mA (Terminal 5 flow regulator ARFIT)
3
GND
Connection for control interface (terminal 3 flow regulator ARFIT)
4
D1
Digital input 1 (Connect to terminal 2 of the ARFIT flow regulator to enable operation)
5
E1
Analogue input 1 (Control 0-10V) (Terminal 4 flow regulator ARFIT)
6
PE
Ground
7
11
Status relay, normally open,
Closes with alarm (2A, 250 VAC)
8
14
9
L1
Power - Phase
230 / 1 EN 1:50
(See characteristics on the motor plate)
10
L2
Not applicable
11
L3/N
Power - Neutral
Image 2
Image 3
