Fujitsu AIRSTAGE J-IIIL Design & Technical Manual page 500

• Connection to external contacts
External switch controller
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.
– Example 2
Parallel connection of CH1 and CH2 is prohibited.
Indoor unit
3-9. External switch controller (UTY-TERX)
Window contacts
Card holder
• 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 22 to 16 AWG (0.33 to 1.25
2
mm ) should be used.
• Maximum cable length: 164 ft (50 m)
EXIN1
UTY-TERX
EXIN2
Window is open -> contact is open
Window is close -> contact is close
- (05-162) -
Indoor unit
3. Adaptor/Convertor units