Fujitsu UTY-VDGX Installation Manual - Page 13
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(3) Wiring the remote controller cable (device side)
For 2-wire type
Y1 Y2
*1
Non-polar
Remote controller cable
Cable tie (Accessories)
*1) If you connect the remote controller cable to the terminal Y3, 2-wire type remote con-
troller does not work.
(4) Set the DIP switch according to the type of remote controller used.
DIP switch
(SW1)
Factory setting : 2WIRE
• When using the wired remote controller, if the temperature drops below 0°C, the LCD
display may become dim, the response may become slower, and the time accuracy of
the clock will be lost.
For 3-wire type
Y1 Y2 Y3
Red
White
Black
7.5. External input and external output (Optional
parts)
7.5.1. Digital external inputs
• Select either the apply voltage method or dry contact method for digital external inputs.
• Both types of terminals cannot be used simultaneously.
• Float witch signal is compatible with the dry contact method only.
Switch connectors as shown in the table below according to the method selected.
Terminal name
ON/OFF SIGNAL
(INPUT)
ERROR SIGNAL
(INPUT)
COOL / HEAT SIGNAL
FLOAT SW SIGNAL
External input terminal
(Dry contact terminal)
CNA04
Controller PCB
• 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.
● Apply voltage terminal ([CNA01], [CNA03], [CNA06])
When a power supply must be provided at the input device you want to connect, use the
Apply voltage terminal ([CNA01], [CNA03], [CNA06]).
Power supply
DC 12 to 24 V
Load
resistance
*a
Load
resistance
*a
Load
resistance
*a
Load
resistance
*a
connected unit
*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.
PCB connector (*: Factory setting)
Apply voltage
Dry contact
CNA01
CNA02*
CNA06
CNA07*
CNA03
CNA04*
Incompatible
CNA05*
CNA02
CNA07
External output terminal
CNB01
External input terminal
(Apply voltage terminal)
CNA01
CNA03
CNA06
Control unit
*1
Terminal
P.C.B.
board
CNA01
*b
CNA06
CNA03
En-12