Velleman projects K2634 Assembly instructions - Manual (Page 8)

8
Connection
ATTENTION : everything on the print from the optocouplers to the output side is subjected to this
(eventual) hazardeous voltage.
The loads are connected to OUT1 and OUT4.
Interferences on the mains are possible because of the fact that the load switching does not necessarily
takes place on the zero crossing point of the AC. When this should disturb the computer functioning, we
advise you to install the triac card near the loads to be switched.