En-13
Wiring arrangement
In following figure, all the possible connectors are connected for description.
In actual installation, you cannot connect all the connectors at once.
EMI core (accessory
of the IR receiver unit)
CAUTION
To protect the cable insulation after opening a knockout hole, remove any burrs from
the edge of the hole.
Cable tie (Medium/Accessories)
Remote sensor, Auto Louver
grille, External power supply unit
Cable tie (Medium/Accessories)
External input and external
output, IR receiver unit
Avoid covering the air inlet
with the wiring.
Avoid touching the ceiling with the wiring
Ceiling
Power supply
cable
Do not bind the power supply cable and other cables together.
6.6. External input and external output (Optional parts)
(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
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]).
Input
d
ev
ic
e 1
Input
d
ev
ic
e 2
Input
d
ev
ic
e 3
Load
resistance
Load
resistance
Load
resistance
*1
DC power supply
12 to 24V
connected unit
*a
*a
*a
P.C.B
CNA01
CNA03
*b
*1 Make the power supply DC12 to 24V. Select a power supply capacity with an ample
surplus 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.
DC power supply
12 to 24V
connected unit
Load
resistance
P.C.B
P.C.B
CNA01
P.C.B
Input
d
ev
ic
e 1
Input
d
ev
ic
e 2
In
d
o
o
r u
n
it
In
d
o
o
r u
n
it
In
d
o
o
r u
n
it
Load
resistance
CNA01
CNA01
● 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]).
P.C.B
GND
Ch 1
Ch 3
*c
*c
*c
*d
Ch 2
CNA02
CNA04
connected unit
*c Select very low current use contacts (usable at DC12V, DC1mA or less).
*d The wiring is diff erent 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
o
w
e
r s
u
p
p
ly f
o
r r
e
lay
In
d
o
o
r u
n
it
In
d
o
o
r u
n
it
In
d
o
o
r u
n
it
Input device 2
Input device 1
K1 - K6: Relay
(Device for DC Current)
P.C.B
K1
P.C.B
P.C.B
CNA02
K2
K3
K4
K5
K6
CNA02
CNA02
9374342549_IM.indb 13
9374342549_IM.indb 13
2/15/2019 5:46:08 PM
2/15/2019 5:46:08 PM
