14
GB
7.5. External I/O Specifications
I/O Specifications
Input
Function
Application
Signal specifications
Start/Stop
Turning ON/
OFF the indoor
unit
Pulse [Factory setting: Dip SW1-9 ON]
(a-contact with voltage/without voltage)*1
<With voltage>
Power Source: DC12~24V
Electrical Current:
Approximately 10mA (DC12V)
<Standard Pulse>
over 200ms
(Pulse powering time)
over 200ms
(Pulse interval)
Level [Dip SW1-9 OFF]
Short: operate
Open: stop
Dehumidifica
-
tion signal
Sending a com-
mand to perform
dehumidification
with priority
Level
Refer to the wiring diagram <Dehumidifi
-
cation command>.
* 1 Use minute-current contact (DC12V 1mA)
Caution:
1. Wiring should be covered by insulation tube with supplementary insu-
lation.
2. Use relays or switches with IEC or equivalent standard.
3. The electric strength between accessible parts and control circuit should
have 2750 V or more.
Output
Function
Application
Signal specifications
Operation
status
External output of operation
status signal for each coolant
circuit of indoor unit.
Relay “a” contact output
DC30 V or AC220 - 240 V
Contact rated current: 1 A
Contact minimum load: 10 mA
Fault
External output of fault signal
for each coolant circuit of
indoor unit.
[Fig. 7.5.1] (P.6)
<A> Model 250
<B> Model 500
A
With-voltage input
B
External power supply
C
Start/Stop
D
No-voltage input
E
Common
F
Start/Stop
G
Relay contact output
H
Display power supply
I
Operation status
J
Fault
K
External I/O board
L
Terminal block connection
M
Connector connection
N
Wiring distance 100 m or less.
A
With-voltage input
External power
supply
Pulse input of start or stop
DC12 - 24 V
Input current (per contact)
Approximately 10 mA (DC12 V)
SW12
Remote Start/Stop switch
* Toggles ON/OFF each time switch is pressed (pulse input).
D
No-voltage input
SW11
Remote Start/Stop switch
* Toggles ON/OFF each time switch is pressed (pulse input).
Contact: Minimum applicable load DC 12 V 1 mA
Contact rating DC 12 V 0.1 A and over
G
Relay contact output
Display power
supply
DC30 V 1 A or less
AC220 - 240 V 1 A
L1, L3
Operation status
L2, L4
Fault status
XA ~ XE
Relay (allowable current 10 mA - 1 A)
• Settings for indoor unit
Check that the following settings have been entered when using external input.
1) Control board DIP SW3 - 8 ON
(Set to ON prior to shipment from factory. External input disabled when set to
OFF.)
2) Address board DIP SW1 - 10 OFF
(Set to OFF prior to shipment from factory. External input disabled when set
to ON.)
3) Normal/Local switch inside unit control box set to Normal.
(Set to Normal prior to shipment from factory. External input disabled when
set to Local.)
Wiring Method
1. Check the indoor unit settings (Refer to 7. Electrical Wiring Diagram).
2. When using the external output function, connect the signal lines to the ex-
ternal output terminal (TB22) of the unit as appropriate for the application.
Peel the cover of wires and connect to the terminals.
3. When using the external input function, connect the signal lines to the exter-
nal input terminal (TB21 or TB23) of the unit as appropriate for the applica
-
tion. Peel the cover of wires and connect to the terminals.
Caution:
1. TB21 is a dedicated terminal for no-voltage contact input. Connection
to a voltage may result in a fault in the indoor control board.
2. TB23 is a dedicated terminal for voltage contact input. Connect only
after checking polarity. Failure to do so may result in a fault.
3. When using AC220 - 240 V, ensure that input wiring and communication
cables are installed separately from output wiring.
4. External signal lines may be extended up to 100 m.
[Fig. 7.5.2] (P.6)
A
Site wiring
B
Fix low-voltage system (DC30 V or less) wiring with clamps and pass to unit via
transmission line wiring holes.*1
C
Fix high-voltage system (AC220 - 240 V) wiring with clamps and pass to unit via
power supply wiring holes.*2
D
To CN51 on control board (air-conditioner internal wiring).
E
model 500 only
*1 Installation together with AC220 - 240 V high-voltage system wiring may re
-
sult in mis-operation of the unit due to noise.
*2 Installation together with DC30 V (or less) low-voltage system wiring may
result in mis-operation of the unit due to noise.
<Arrangement parts on site>
External output functions
Product name
Model and specifications
External output
signal lines
Use plastic-sheathed cord or cable.
Wiring type: CV, CVS, or equivalent.
Wiring size: Twisted 0.5 mm
2
- 1.25 mm
2
Single wire: ø0.65 mm - ø1.2 mm
Display lamps
etc.
No-voltage “a” contacts DC30 V 1 A or less
AC220 - 240 V 1 A or less
External input functions
Product name
Model and specifications
External input
signal lines
Use plastic-sheathed cord or cable.
Wiring type: CV, CVS, or equivalent.
Wiring size: Twisted 0.5 mm
2
- 1.25 mm
2
Single wire: ø0.65 mm - ø1.2 mm
Switches
No-voltage contacts
