En-10
6.6 External input and external output (optional parts)
CAUTION
Do not operate any switches other than prescribed, as it can cause the unit to operate
improperly or malfunction.
Use an insulated screwdriver to set the DIP switches.
(CNA03)
(CNA01)
(CNA04)
(CNA02)
SW1
SW2
SW3
SW4
Apply voltage
terminal
Dry contact
terminal
Controller PCB
DIP switch
(SET 2)
ON
OFF
Output terminal (CNB01)
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 termi-
nals 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
de
vic
e 1
Input
de
vic
e 2
Input
de
vic
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
de
vic
e 1
Input
de
vic
e 2
Indo
or
unit
Indo
or
unit
Indo
or
unit
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 different from Apply voltage terminals. Be suf
fi
ciently careful when wiring.
When connected to Dry contact terminals of multiple indoor units with a connected unit, insu-
late 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
la
y
Indo
or
unit
Indo
or
unit
Indo
or
unit
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
