6
7
7.5
[Fig. 7.5.1]
B
External power supply
C
Start/Stop
E
Common
F
Start/Stop
H
Display power supply
A
With-voltage input
K
External I/O board
D
No-voltage input
G
Relay contact output
I
Operation status
J
Fault
L
Terminal block connection
M
Connector connection
N
Wiring distance 100 m or less.
L1
L2
SW12
SW11
CN53
1
2
3
4
5
1
2
3
4
5
TB21
TB22
TB23
XA
XB
XB
XA
COM
1
2
BC
B1
B2
AC
A1
A2
3
4
5
CN54
<A> Model 250
<B> Model 500
B
External power supply
C
Start/Stop
A
With-voltage input
E
Common
F
Start/Stop
H
Display power supply
D
No-voltage input
G
Relay contact output
I
Operation status (No.1)
J
Fault (No.1)
I
Operation status (No.2)
J
Fault (No.2)
L
Terminal block connection
M
Connector connection
N
Wiring distance 100 m or less.
SW12
K
External I/O board
L1
L2
L3
L4
(*1)
Short circuit plate
(*1)
Short circuit plate
SW11
CN53
1
2
3
4
5
1
2
3
4
5
TB21
TB22
TB23
XA
XB
XC
XE
XD
XE
XD
XC
XB
XA
COM
1
2
BC
B1
B2
AC
A1
A2
3
4
5
CN54
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)
(*1)
For instructions on how to install the short circuit plate, refer to “Notes on
using external input function” shown below.
• Notes on using external functions (Model 500 only)
When using the external input function on the indoor unit that is connected to a
two-refrigerant circuit, connect the short-circuit plate that is supplied with the unit to
the appropriate terminals on the external input-output board.
Without the short-circuit plate, the unit will not function properly.
Don’t connect the short-circuit plate in case of a one-refrigerant circuit.
Caution
External input-output board
<The case of with-voltage input>
· Connecting the short-circuit plate
<The case of no-voltage input>
External input-output board
Short-circuit plate
External input
5
4
3
2
1
COM
B2
B1
BC
A2
A1
AC
TB23
TB21
TB22
CN53
CN54
Short-circuit plate
External input
5
4
3
2
1
COM
TB23
TB21
TB22
CN53
CN54
B2
A2
A1
AC
B1
BC
[Fig. 7.5.2]
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
(inner wiring)
E
model 500 only
E
model 500 only
For instructions on how to install
the short circuit plate, refer to
"Notes on using external input
function" shown on the left.
5
4
3
2
1
COM
B2
B1
BC
A2
A1
AC
TB23
TB21
TB22
CN53
CN54
