Terminal

Function

CoolEx-A45

CoolEx-A412

CoolEx-D45

CoolEx-D412

+12V

12V Power Supply Input

7.5V to 25V

GND

Ground

485-A

485 2-wire bus

Polarity is important in connection to bus

485-B

D0..D5

5V Output

12V Output

5V Output

12V Output

Digital or PWM

A0..A5

Analog Output

5V Digital Input/Output

F1

Connection to Air Conditioning System Communication Line

No polarity

F2