Fujitsu ASUH18LMAS Service Manual page 190

¢ External input and output PCB
• A twisted pair cable (22A→G) should be used. Maximum length of cable is 82 ft (25 m).
• Output voltage: High DC 12 V±2 V, Low 0 V.
• Permissible current: 50 mA
• For details, refer to
• When indicator or other components are connected directly:
Example: Rotary S→ on External input and output PCB is set to "1".
(Operation status)
(Indoor unit fan
operation status)
• When connecting with a device equipped with a power supply:
Example: Rotary S→ on External input and output PCB is set to "1".
Connected device 1
Connected device 2
Connected device 3
2-2. External output
"Combination of external input and output"
Connected unit
Resistor
LED 1
Resistor
LED 2
(Error status)
Resistor
LED 3
Connected unit
(Operation status)
(Error status)
(Indoor unit fan
operation status)
on page 05-17.
Relay
- (05-16) -
PCB
+
1
Connector
-
(CN310)
2
+
1
Connector
-
(CN311)
2
+
1
Connector
-
(CN312)
2
PCB
+
1
Connector
(CN310)
-
2
+
1
Connector
(CN311)
-
2
+
1
Connector
(CN312)
-
2
2. External input and output