Fujitsu Airstage ASUB18TLAV1 Installation Manual page 11

Input select
Use either one of these types of terminal according to the application. (Both types of
terminals cannot be used simultaneously.)
● Apply voltage terminal ([CNA01], [CNA03])
When a power supply must be provided at the input device you want to connect, use the
Apply voltage terminal ([CNA01], [CNA03]).
DC power supply
12 to 24V
Load
resistance
*a
Load
resistance
*a
Load
resistance
*a
Connected unit
*1: Make the power supply DC 12 to 24 V. Select a power supply capacity with an ample
surplus for the connected load.
Do not impress a voltage exceeding 24 V across pins 1-2, and 1-3.
*a: The allowable current is DC 5 mA to 10 mA. (Recommended: DC 5 mA)
Provide a load resistance such that the current becomes DC 10 mA or less.
Select very low current use contacts (usable at DC 12 V, DC 1 mA or less).
*b: The polarity is [+] for pin 1 and [-] for pin 2 and 3. Connect correctly.
When connected to Apply voltage terminals of multiple indoor units with a connected unit,
be sure to make a branch outside the indoor unit using a pull box, etc. as shown on below
example.
DC power supply
12 to 24V
Load
resistance
Load
resistance
Connected unit
● Dry contact terminal ([CNA02], [CNA04])
When a power supply is unnecessary at the input device you want to connect, use the Dry
contact terminal ([CNA02], [CNA04]).
*c *c
Ch 1 Ch 2
*c
Ch 3
Connected unit
*c: Select very low current use contacts (usable at DC 12 V, DC 1 mA or less).
*d: The wiring is different from Apply voltage terminals. Be sufficiently careful when wiring.
When connected to Dry contact terminals of multiple indoor units with a connected unit,
insulate each indoor unit with relay, etc. as shown on below example.
P.C.B
*1
CNA01
*b
CNA03
Operation behavior
● Input signal type
The input signal type can be selected.
It is switched by DIP switch on the indoor unit PCB.
P.C.B
● When function setting is "Operation/Stop" mode.
[In the case of "Edge" input]
CNA01
P.C.B
CNA01
[In the case of "Pulse" input]
P.C.B
CNA01
* The last command has priority.
* The indoor units within the same remote controller group operates in the same mode.
● When function setting is "Emergency stop" mode.
[In the case of "Edge" input]
P.C.B
CNA02
[In the case of "Pulse" input]
GND
*d
CNA04
* All indoor units of same refrigerant system stops when Emergency stop operates.
K1
K2
K3
Input device 1
Input device 2
NOTE :
When connected to multiple indoor units directly, it will cause breakdown.
DIP switch [SET2 SW2] Input signal type
OFF (Factory setting) Edge
ON Pulse
Connector Input signal
OFF → ON
Ch1 of CNA01 or CNA02
ON → OFF
Connector Input signal
OFF → ON
Ch1
CNA01 or CNA02
OFF → ON
Ch2
Connector Input signal
OFF → ON
Ch1 of CNA01 or CNA02
ON → OFF
Connector Input signal
Ch1 OFF → ON
CNA01 or CNA02
Ch2 OFF → ON
P.C.B
K4
CNA02
P.C.B
K5
CNA02
P.C.B
K6
CNA02
K1 - K6: Relay
(Device for DC Current)
Edge
Pulse
The width of pulse must be
longer than 200 msec.
Command
Operation
Stop
Command
Operation
Stop
Command
Emergency stop
Normal
Command
Emergency stop
Normal
En-10