• Connection to external contacts
External switch controller
• Select low current use contacts (usable at DC 5
V, 2 mA or less).
• Short circuit detection resistance (R on): ≤ 500 Ω
• Open circuit detection resistance (R off): ≥ 100 kΩ
• A twister pair cable 0.33 to 1.25 mm
2
(22 to 16
AWG) should be used.
• Maximum cable length: 50 m
CAUTION
When using setback function and remote controller prohibition setting is used, leave more than 5
seconds between sensor switchings such as opening and closing the window. Otherwise, the op-
eration signal cannot be received properly, and the control from your remote controller will not
work. In such case, canceling of the setting by using Service tool is required.
Prohibited connection example
– Example 1
Series connection of window contacts and card holder is prohibited.
EXIN2
EXIN1
UTY-TERX
Window contacts
Indoor unit
Card holder
– Example 2
Parallel connection of CH1 and CH2 is prohibited.
Window is open -> contact is open
Window is close -> contact is close
Indoor unit
3-13. External switch controller (UTY-TERX) - (05-192) - 3. Adaptor/Convertor units
CONTROL
SYSTEM
CONTROL
SYSTEM
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