Design Technical Manual

1-2. INDOOR UNIT
External input External output Input select Connector External connect kit
(Optional parts)
Control input -
Apply voltage CNA01 UTY-XWZXZB
Dry contact CNA02 UTY-XWZXZD
Forced thermostat off -
Apply voltage CNA03 UT Y-XWZXZ7
Dry contact CNA04 UTY-XWZXZE
- Operation status
- CNB01 UTY-X WZ X ZC
- Error status
- Indoor unit status
- Auxiliary heater output
1-2-1. EXTERNAL INPUT
● Indoor unit can be Operation/Stop or Emergency stop or Forced stop by using indoor unit PCB CNA01 or
CNA02.
● "Start/Stop" mode or "Emergency stop" mode or "Forced stop" mode can be selected with function setting of
indoor unit.
● A twisted pair cable (22AWG) 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.)
z
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])
1
2
1
2
3
+
+
-
-
-
Input device 1
Input device 2Input device 3
Load
resistance
Load
resistance
Load
resistance
*9
DC power
supply 12 - 24 V
connected unit
P.C . B
CNA01
CNA03
*a
*a
*a
*b
*9: Make the power supply DC 12 to 24 V. Select a power supply capacity with an ample surplus for the
connected load.
Do not connect 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.
- (08 - 08) -
EXTERNAL INPUT & OUTPUT EXTERNAL INPUT & OUTPUT