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Layout of electrical terminals
Connector (CN02) for
schedule timer (optional)
How to connect electrical wiring
1) Basic wiring
N:
Power supply (220 – 240 V
L:
U1:
Inter-unit control wiring. (Low voltage)
(Use shielded wiring)
U2:
C3:
Reserve
C4:
Earth for inter-unit control wiring
2) Terminals for remote monitoring
A1:
Input for turning on air conditioners concurrently.
A2:
Input for turning off air conditioners concurrently.
A3:
Common input for turning air conditioners on or off.
B1:
On operation state indicator output.
B2:
Alarm indicator output.
B3:
Common indicator output.
DC voltage pulse
Photocoupler input
Allowable contact voltage
and current : 24 V , 10 mA
Pulse width : 300 ms or more
No-voltage a-contact
static output
Allowable contact voltage
and current : 30 V , 0.5 A
Clamp for electrical wiring
50/60 Hz)
DC24V
COM
Digital
Input
P.C. board
Earth for
power wiring
Fig. 3
SYSTEM CONTROLLER
A1
A2
A3
B1
B2
B3
EN
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