Dry Contact (Spx-Wdc3) Application (Using Dip Switch) - Hitachi MULTIZONE RAM-40NE2F Technical Catalogue

10.3 DRY CONTACT (SPX-WDC3) APPLICATION (USING DIP SWITCH)

The dry contact system enables the operation of the air conditioner indoor unit to be controlled by using external dry contacts
(with non voltage) such as card-key controller or window for facilities such as hotels.
Optional Connecting cord Accessory SPX-WDC3
Main PWB side
Connecting cord
(CN# terminal)
SPX-WDC3
Dry Contact side
(no polarity)
Note:
1) DRY CONTACT function is "Enable" by set pin No. 2 of the DIP SWITCH (refer to table 1 for the label) to ON position.
2) Select the proper setting for DRY CONTACT LOGIC INPUT pin No. 3 on DIP SWITCH (refer to Table 1 for the label)
i) Set to OFF position (Hi Input) if the type of Dry Contact switch to be used (for the CARD KEY UNIT or Window) is of
contact type a (Normally Open Type) as shown in below diagram.
ii) Set to ON position (Lo Input) if the type of Dry contact switch to be used (for the CARD KEY UNIT or Window) is of contact
type b (Normally Close Type) as shown in below diagram.
Pin No.
2
3
Table 1 (Applicable models and related information)
ON
↕
OFF
DIP SW Label
Function
DRY CONTACT function OFF
DRY CONTACT Input Logic OFF HI Input Active ON LO Input Active
Error! Reference source not found.
Model DIP SW Label
RAK-15QEF
RAK-18REF
RAK-25REF DSW1
RAK-35REF
RAK-50REF
Switch Position / Setting
Disable ON Enable
10-17
CN#
CN6