Mitsubishi Electric G-50A Technical Manual page 23

[Example to use relay board]
Centralized control
system M-NET bus
(2) In case of K-control Y-series system
Total wiring length (p): 500m or less, when exceeded this length, be sure to use the relay board.
Centralized control
system M-NET bus
(3) In case of system where K-control Mr.Slim air conditioner and Y-series are mixed
Be sure to use the relay board as shown in the figure below, and connect the indoor unit of K-control
Mr.Slim air conditioner to the secondary side of the relay board.
Centralized control
system M-NET bus
[Caution for wiring connection work]
CAUTION
K-transmission
converter
Relay board
K-control Mr.Slim
air conditioner
Local
indoor unit
remote
controller
Figure 4-4 Relay board wiring example
K-transmission
converter
Local
remote
controller
Figure 4-5 K-control Y-series wiring example
K-transmission
converter
Local
remote
controller
Figure 4-6 K-control mixing system example
The wiring connection work of the equipment delivered (MELANS equipment, air
conditioning equipment, etc.) including power and earth lines.
Install the transmission line and signal line apart from the power line and earth
line. If not, the noise from the power/earth lines will mix into the transmission line
or signal line causing to generate erroneous operation.
In case of shielded line, provide one-point grounding at each transmission line.
(Relay shielded line at the terminal block of each equipment.)
m
m
K-control Mr.Slim
air conditioner
Local Local
indoor unit
remote remote
controller controller
p
K-control
Y-series
outdoor unit
K-control K-control
Y-series Y-series
Local
indoor unit indoor unit
remote
controller
p
Relay board
K-control Mr.Slim K-control Mr.Slim
air conditioner air conditioner
Local
indoor unit indoor unit
remote
controller
Relay board
m
K-control Mr.Slim K-control Mr.Slim
air conditioner air conditioner
Local
indoor unit indoor unit
remote
controller
K-control
Y-series
outdoor unit
K-control
Y-series
Local
indoor unit
remote
controller
K-control
Y-series
outdoor unit
K-control
Y-series
Local
indoor unit
remote
controller
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