10
C420 Installation Manual
3.3.1 AC/DC power supply unit
The power supply unit, located on the left side of the mechanical chassis, converts the AC mains in a DC voltage suitable to power
the control panel on. The terminals for the connection with the AC mains are located on the module as indicated below.
Figure 2 – Terminal board of the power supply unit
Power supply unit terminals
L
Mains cable connection (phase)
N
Mains cable connection (neutral)
Ground connection
COM
Negative output 26.4V
COM
Negative output 26.4V
+V
Positive output 26.4V
+V
Positive output 26.4V
NOTE: do not remove the connections already in place.
