Fujitsu Airstage J-II Series Design & Technical Manual page 865

When connected to Dry contact terminals of multiple RB units with a connected unit, insulate
each RB unit with relay, etc. as shown on below example.
Input device
NOTE :
● If power is connected to dry contact on indoor units, damage will occur.
P.C.B
K1
P.C.B
K2
P.C.B
K3
K1 - K3 : Relay
(Device for DC Current)
- (08 - 45) -
CNA
01
CNA
01
CNA
01