Hitachi SPX-WDC3 Installation & Operation Manual page 5

Final wiring connection will be as below (reference only)-About RAK-18/25/35PSA only
DRY CONTACT UNIT (INSTALLER PREPARATION)
CARD SENSOR
INDICATOR
AC POWER
SUPPLY
Connection example.
Using Dry Contact TYPE a
Accessory#: SPX-WDC3
INDOOR UNIT
PCB
SERIAL CONNECTION
(ALL SW ON -->OPERATION)
Using Dry Contact Type b
Accessory#: SPX-WDC3
INDOOR UNIT
PCB
SERIAL CONNECTION
(ALL SW OFF -->OPERATION)
DRY
CONTACT
Connecting cord to PCB
SPX-WDC3
Connecting Cord to PCB
Connection
Connection
Connecting Cord to PCB
Connection
Connection
Contact with sleeve
Window
CLOSE : ON
OPEN : OFF
Window
CLOSE : ON
OPEN : OFF
Window
OPEN : OFF
CLOSE : ON
Dry Contact Unit
Insert Card : OFF
Remove Card : ON
Window
OPEN : OFF
CLOSE : ON
– 5 –
AIR CONDITIONER INDOOR
CONTROL BOARD
SW501
or
CN6
Jumper wire
JP1 JP2
Dry Contact Unit
Insert Card : ON
Remove Card : OFF