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Wiring arrangement
In following figure, all the possible connectors are connected for description.
In actual installation, you cannot connect all the connectors at once.
Cable tie
(locally
purchased)
EMI core
(accessory of the
IR receiver unit)
6.6. External input and external output (optional parts)
6.6.1. 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]).
DC power supply
12 to 24 V
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.
Cable clamp
● 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: Select very low current use contacts (usable at DC12V, DC1mA 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
NOTE:
When connected to multiple indoor units directly, it will cause breakdown.
(*b)
Operation behavior
● Input signal type
The input signal type can be selected.
It is switched by DIP switch on the indoor unit PCB.
CNA03
● When function setting is "Operation/Stop" mode.
Edge
Pulse
* The last command has priority.
* The indoor units within the same remote controller group operates in the same mode.
DC power supply
12 to 24 V
Load resis-
tance
Load resis-
tance
Connected unit
(*c)
(*c)
Ch 1
Ch 2
(*c)
Ch 3
Connected unit
K1
K2
K3
Input device 1
Input device 2
DIP switch [SET2 SW2]
Input signal type
Edge
OFF (Factory setting)
Pulse
ON
Input
Connector
Input signal
OFF → ON
Ch1 of CNA01 or
CNA02
ON → OFF
Ch1
OFF → ON
CNA01 or
CNA02
Ch2
OFF → ON
P.C.B
CNA01
P.C.B
CNA01
P.C.B
CNA01
P.C.B
CNA02
GND
(*d)
CNA04
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
Operation
Stop
En-10
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