Fujitsu AB*A12, Service Manual

Page: 49 / 322

2-4 EXTERNAL INPUT & OUTPUT
02-36
2-4-1 Indoor Unit
Resistance < 500(ohm) ( Switch : ON )
Resistance > 100(Kilo-ohm) ( Switch : OFF )
A twisted-pair cable(AWG22) should be used maximum length of cable is 25m.
1. Control input (Operation/Stop)
Indoor unit can be operated or stopped by using the connector CN27(RED) on indoor unit PCB.
Dip SW3-4 Input select
OFF
ON
Edge
Pulse
(1) Input select
(2) In the case of "Edge" input
CONNECTOR INPUT SIGNAL COMMAND
Ch1 of
CN27 (RED)
OFF ON
ON OFF
Operation
Stop
1
2
CN 27(RED)
3
Ch 2
Ch 1
Ch1 of
CN27
(3) In the case of "pulse" input
CONNECTOR INPUT SIGNAL COMMAND
OFF ON Operation
Stop
CN27 (RED)
Ch1
Ch2
OFF ON
On
On
Off
Remote
Controller
Indoor
Unit
NOTE
1. The last command has priority.
2. The indoor units within the same
remote controller group operates
in the same mode.
3.The wire connection shall be
separate from the power cable line.
Operation
Stop
CN27
On
Off
Indoor
Unit
Operation
On
Off
Ch1
Ch2
The width of pulse must be longer than 200ms.
Stop