¢ External output
Terminal Ch Pin Output voltage Status
CN18
Ch1
4 DC 12 V One or more indoor units: Operation
3 0 V All indoor units: Stop
Ch2
2 DC 12 V Error
1 0 V Normal
Connected load
*
2
Connected load
*
2
*
3
Connected unit
DC power supply
12 V *
1
+
+
+
+
-
-
-
-
CN18
PCB
134 2
*
1
:
Provide a DC 12 V power supply. Select a power supply capacity with an ample surplus for
the connected load. Do not impress a voltage exceeding 12 V across pins 1-2 and 3-4.
*
2
:
The allowable current is DC15 mA or less. Provide a load resistance such that the current
becomes DC 15 mA or less.
*
3
:
Polarity is “+” for pins 1 and 3, “-” for pins 2 and 4. Connect correctly.
Operation status (External output 1)
The output for CN18 (3-4) is on when one
or more indoor units are operating.
The output is off when all of the indoor
units are stopped.
Operation
Stop
12 V
0 V
CN18 (3-4)
Output
Indoor unit(s)
Error status (External output 2)
The output for CN18 (1-2) is on when an
error is generated at one or more indoor
units, outdoor unit or Central remote con-
troller.
Error
Normal
12 V
0 V
CN18 (1-2)
Output
Indoor unit(s) or
Outdoor unit or
Central R.C.
4-2. Central remote controller (UTY-DCGZ)
- (08-36) - 4. Controller
EXTERNAL INPUT
AND OUTPUT
EXTERNAL INPUT
AND OUTPUT
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