External Input - Fujitsu AJ 126LELDH Series Design & Technical Manual

3-1. External input

• Operation/Stop, Emergency stop, or Forced stop of the indoor unit can be set by using CNA01 or
CNA02 on the indoor unit PCB.
• Start/Stop mode, Emergency stop mode, or Forced stop mode can be selected with function set-
ting of the indoor unit.
• Forced thermostat off of the indoor unit can be set by using CNA03 or CNA04 on the indoor unit
PCB.
• A twisted pair cable 0.33 mm
• Use an external input and output cable with appropriate external dimension, depending on the
number of cables to be installed.
• When connecting the external input wire, do not route the wire closely to the power cable line.
¢ Input select
Use either one of Apply voltage terminal of Dry contact terminal according to the application. (Both
types of terminals cannot be used simultaneously.)
• CNA01, CNA03: Apply voltage terminal
When a power supply must be provided at the input device you want to connect, use the Apply
voltage terminal (CNA01, CNA03).
1 Make the power supply DC12 to 24 V. Select a power supply capacity with an ample sur-
* :
plus for the connected load. Do not impress a voltage exceeding 24 V across pins 1-2,
and 1-3.
2 The allowable current is DC 5 mA to 10 mA. (Recommended: DC 5 mA)
* :
Select very low current use contacts (usable at DC 12 V, DC 1 mA or less).
3 The polarity is "+" for pin 1, and "-" for pin 2 and 3. Connect correctly.
* :
3-1. External input
2
(22 AWG) should be used. Maximum length of cable is 150 m.
DC power supply
12 to 24 V
-
Load
resistance
* 2
Load
resistance
* 2
Load
resistance
* 2
Connected unit
- (08-9) -
PCB
*
1
+
+
-
-
*
1
2
CNA01
3
3
1
CNA03
2
3. Indoor unit