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6.6. Optional parts cable binding
Conduit
(Power supply
cable)
Avoid touching the ceiling with the wiring
Do not bind the power supply cable and other cables together.
To protect the cable insulation after opening a knockout hole, remove any burrs from the
edge of the hole.
6.7. External input and external output (Optional parts)
6.7.1 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 492 ft (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
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]).
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.
En-11
Cable tie (Medium/Accessories)
Remote sensor, Receiver unit and
Auto Louver grille
Cable tie (Medium/Accessories)
External input and external output
Avoid covering the air inlet with
the wiring.
Ceiling
CAUTION
DC power supply
P.C.B
*1
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
*c
Ch 3
*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.
CNA01
*b
Input device 1
CNA03
NOTE :
When connected to multiple indoor units directly, it will cause breakdown.
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
DC power supply
12 to 24V
Load
resistance
Load
resistance
Connected unit
*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
P.C.B
CNA01
P.C.B
CNA01
P.C.B
CNA01
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 200 msec.
Command
Operation
Stop
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