En-9
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 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]).
*a
*b
*1
CNA01
CNA03
*a
*a
In
put
de
vi
ce 1
In
put
de
vi
ce 2
In
put
de
vi
ce 3
Load
resistance
Load
resistance
Load
resistance
DC power supply
12 to 24 V
Connected unit
P.C.B
*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.
CNA01
CNA01
CNA01
DC power supply
12 to 24 V
Connected unit
Load
resistance
P.C.B
P.C.B
P.C.B
In
put
de
vi
ce 1
In
put
de
vi
ce 2
In
do
or u
ni
t
In
do
or u
ni
t
In
do
or u
ni
t
Load
resistance
● 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]).
CNA02
*c
*c
*c
*d
CNA04
P.C.B
GND
Ch 1
Ch 3
Ch 2
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 wir
-
ing.
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.
K1
CNA02
CNA02
CNA02
K2
K3
K4
K5
K6
Po
w
er s
up
pl
y f
or r
el
ay
In
do
or u
ni
t
In
do
or u
ni
t
In
do
or u
ni
t
Input device 2
Input device 1
K1 - K6: Relay
(device for DC current)
P.C.B
P.C.B
P.C.B
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.
Pulse
Edge
The width of pulse must be
longer than 200 msec.
DIP switch [Set 2 SW2]
Input signal type
OFF (factory setting)
Edge
ON
Pulse
● When function setting is “Operation/Stop” mode.
Input signal
type
Connector
Input signal
Command
Edge
Ch1 of CNA01
or CNA02
OFF → ON
Operation
ON → OFF
Stop
Pulse
CNA01 or
CNA02
Ch1
OFF → ON
Operation
Ch2
OFF → ON
Stop
*
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.
Input signal
type
Connector
Input signal
Command
Edge
Ch1 of CNA01
or CNA02
OFF → ON
Emergency stop
ON → OFF
Normal
Pulse
CNA01 or
CNA02
Ch1
OFF → ON
Emergency stop
Ch2
OFF → ON
Normal
*
All indoor units of same refrigerant system stops when emergency stop operates.
●
When function setting is “Forced stop” mode.
Input signal
type
Connector
Input signal
Command
Edge
Ch1 of CNA01
or CNA02
OFF → ON
Forced stop
ON → OFF
Normal
Pulse
CNA01 or
CNA02
Ch1
OFF → ON
Forced stop
Ch2
OFF → ON
Normal
*
When the forced stop is triggered, indoor unit stops and operation/stop operation by a
remote controller is restricted.
*
When forced stop function is used with forming a remote controller group, connect the
same equipment to each indoor unit within the group.
• Selection method of functions
“Operation/Stop” mode or “Emergency stop” mode, “Forced stop” mode can be selected
with function setting of indoor unit.
● Forced thermostat off function
[“Edge” input only]
Function
setting
Connector
Input signal
Command
60-00
Ch3 of CNA03 or
CNA04
OFF → ON
Thermostat off
ON → OFF
Normal
● Refrigerant leak detection function (only for J-IIIL series)
[“Edge” input only]
Function
setting
Connector
Input signal
Command
60-09
Ch3 of CNA03 or
CNA04
OFF → ON
No command
ON → OFF
Refrigerant leak
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