En-8
6.5.3. Connection methods
Wire modification for External
input/output wire
(1) Remove insulation from wire at-
tached to wire kit connector.
(2) Remove insulation from field
supplied cable. Use crimp type
insulated butt connector to join field
cable and wire kit wire.
(3) Connect the wire with connecting
wire with solder.
IMPORTANT:
Be sure to insulate the connection between the
wires.
Locally
purchased
Solder and insulate the connected parts.
Wire kit connector
(optional parts)
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):
Bind to the transmission cable
Transmission cable
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]).
In
pu
t
de
vi
ce 1
In
pu
t
de
vi
ce 2
In
pu
t
de
vi
ce 3
Load resis-
tance
Load resis-
tance
Load resis-
tance
*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 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.
DC power supply
12 to 24V
connected unit
Load resis-
tance
P.C.B
P.C.B
CNA01
P.C.B
In
pu
t
de
vi
ce 1
In
pu
t
de
vi
ce 2
In
do
or
uni
t
In
do
or
uni
t
In
do
or
uni
t
Load resis-
tance
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 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
ow
er s
up
pl
y f
or r
el
ay
In
do
or
uni
t
In
do
or
uni
t
In
do
or
uni
t
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
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
The width of pulse
must be longer than
200msec.
Edge
DIP switch [Set 2 SW2]
Input signal type
OFF (Factory setting)
Edge
ON
Pulse
● When function setting is “Operation/Stop” mode.
[In the case of “Edge” input]
Connector
Input signal
Command
Ch1 of CNA01 or CNA02
OFF → ON
Operation
ON → OFF
Stop
[In the case of “Pulse” input]
Connector
Input signal
Command
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.
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