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7-2. Connecting the Power and M-NET Transmission Lines
Tightening torque for terminal screws: 1 N·m
Connect the M-NET transmission line (either the centralized
control line or indoor-outdoor transmission line) to CN02 on the
controller.
Connect the power supply line (24 VDC, polarized) to CN01 on
the controller.
* Only the M-NET circuitry of this device receives the power from the
M-NET transmission line. The power consumption factor is "1/4"
(equivalent to one ME Remote Controller).
Field
R
Connections
(example)
AC power Line
S
Figure 7-1 Example of Connecting the Power Line and M-NET Transmission Line
Caution:
• Use a power line and M-NET transmission line that satisfy the specifications described in "6-1. Parts Purchased Separately".
• Attach a circuit comprising the following components to the supply primary side of the 24 VDC power supply.
(1) Varistor, (2) Arrester, (3) Noise filter, (4) Fuse
• It is important to pay attention to the polarity when connecting to the 24 VDC power supply terminal block.
Connecting the positive and negative in the reverse order will cause a failure.
• Fix the power line and M-NET transmission line in place on the outside to ensure that the terminal block is not affected by
any external force.
Not securely connecting and fixing the wires in place may cause heat generation and fire.
• Make sure that the copper wiring is not short-circuiting the plates (cover, lower case) or neighboring wires.
Cover the shielded line of the M-NET transmission line with materials such as vinyl tape and prevent short-circuiting with the
plates.
Note:
• If the M-NET transmission line of this device is connected to an M-NET indoor-outdoor transmission line and the outdoor
unit is down because, for example, the power supply is interrupted for servicing or there is a failure, the AI controller cannot
be set and monitored from the system controller.
• Be sure to ground this device, Power supply unit and 24 VDC Power source.
Measurement accuracy may be affected if devices are not grounded.
M-NET
Fuse
Varistor
U
U
CN02
Arrester
Noise
Varistor
Filter
7
A/B/S
AI controller
24 VDC
Power
source
FG
CN01
V+/V-/FG
* Functional
ground
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