Hitachi MULTIZONE RAM-53NE3F - Dry Contact (Spx-Wdc3) Application (Using Dip Switch)

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10-17
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.
Table 1 (Applicable models and related information)
Optional Connecting cord Accessory SPX-WDC3 Model DIP SW Label CN#
RAK-15QEF
RAK-18REF
RAK-25REF
RAK-35REF
RAK-50REF
DSW1 CN6
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.
ON
↕
OFF
Pin No.
Function Switch Position / Setting
2 DRY CONTACT function OFF Disable ON Enable
3 DRY CONTACT Input Logic OFF HI Input Active ON LO Input Active
DIP SW Label
Main PWB side
(CN# terminal)
Dry Contact side
(no polarity)
Connecting cord
SPX-WDC3