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6.5. External input and external output (Optional
parts)
Controller PCB
DIP switch
(SET 2)
ON
OFF
SW4
SW3
SW2
SW1
Dry contact terminal
(1) External input
• Indoor unit can be Operation/Stop, Emergency stop or Forced stop by using indoor unit
PCB CNA01 or CNA02.
• "Operation/Stop" mode, "Emergency stop" mode or "Forced stop" mode can be selected
with function setting of indoor unit.
• Indoor unit can be Forced thermostat off by using indoor unit PCB CNA03 or CNA04.
• A twisted pair cable (22 AWG) should be used. Maximum length of cable is 150 m.
• Use an external input and output cable with appropriate external dimension, depending
on the number of cables to be installed.
• The wire connection should be separate from the power cable line.
Input select
Use either one of these types of terminal according to the application. (Both types of termi-
nals 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]).
Load
resistance
*a
Load
resistance
*a
Load
resistance
*a
connected unit
*1 Make the power supply DC12 to 24V. Select a power supply capacity with an ample sur-
plus for the connected load.
Do not impress a voltage exceeding 24V across pins 1-2, and 1-3.
*a The allowable current is DC 5mA to 10mA. (Recommended: DC5mA)
Provide a load resistance such that the current becomes DC10mA or less.
Select very low current use contacts (usable at DC12V, DC1mA 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.
Load
resistance
Load
resistance
connected unit
En-9
Output terminal
(CNB01)
Apply voltage terminal
(CNA04)
(CNA02)
DC power supply
*1
12 to 24V
DC power supply
12 to 24V
● 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
Ch 1
(CNA01)
*c
(CNA03)
Ch 3
*c Select very low current use contacts (usable at DC12V, DC1mA or less).
*d The wiring is different from Apply voltage terminals. Be suffi ciently 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
Input device 1
CNA01
*b
NOTE :
When connected to multiple indoor units directly, it will cause breakdown.
CNA03
Operation behavior
● Input signal type
The input signal type can be selected.
It is switched by DIP switch on the indoor unit PCB.
DIP switch [Set 2 SW2]
OFF (Factory setting)
● When function setting is "Operation/Stop" mode.
[In the case of "Edge" input]
Connector
Ch1 of CNA01 or CNA02
P.C.B
[In the case of "Pulse" input]
CNA01
CNA01 or CNA02
P.C.B
* The last command has priority.
CNA01
* The indoor units within the same remote controller group operates in the same mode.
P.C.B
CNA01
*c
Ch 2
connected unit
K1
K4
K2
K5
K3
K6
Input device 2
K1 - K6: Relay
(Device for DC Current)
Input signal type
Edge
ON
Pulse
Input signal
OFF → ON
ON → OFF
Connector
Ch1
Ch2
P.C.B
CNA02
GND
*d
CNA04
P.C.B
CNA02
P.C.B
CNA02
P.C.B
CNA02
Edge
Pulse
The width of pulse
must be longer than
200msec.
Command
Operation
Stop
Input signal
Command
OFF → ON
Operation
OFF → ON
Stop