Connecting The M-Net Transmission Line - Mitsubishi Electric GB-50ADA-A Installation Instructions Manual

6-3. Connecting the M-NET transmission line

CAUTION • In an air conditioner system has more than 1 Outdoor units, System controller receiving transmission power
through TB7 on one of the Outdoor unit would have a risk that the connected Outdoor units failure would stop
power supply to System controller, and disrupt the whole system.
(1) To supply power to the M-NET transmission line from GB-50ADA
Connect the M-NET transmission lines as shown in the figure below.
Centralized controller
(GB-50ADA)
TB3
A B S
(2) To supply power to the M-NET transmission line from the power supply unit (PAC-SC51KUA, etc.)
Connect the M-NET transmission lines as shown in the figure below.
Centralized controller
(GB-50ADA)
OFF OFF OFF
ON ON ON
TB3
A B S
TB3
OFF OFF OFF
CN41
ON ON ON
CN40 CN40 CN40
(PAC-SC51KUA, etc.)
TB3
CN41 CN41 CN41
CN40
M-NET
CAUTION • Connect the power jumper of the GB-50ADA to
CN40 (supplies power).
Connect the power jumper of the outdoor unit
to CN41 (does not supply power).
• Use specified transmission lines, and connect
them to the appropriate terminals. Secure the
cables to keep undue force from being applied.
Improper connections or failure to properly secure
cables may result in overheating and fire.
*1 Insulate the cables with vinyl tape, except the part
that connects to the ring terminal.
Power supply unit
M-NET
CAUTION • Connect the power jumper of the GB-50ADA to
CN41 (does not supply power).
Connect the power jumper of the outdoor unit
to CN41 (does not supply power).
• Use specified transmission lines, and connect
them to the appropriate terminals. Secure the
cables to keep undue force from being applied.
Improper connections or failure to properly secure
cables may result in overheating and fire.
*1 Insulate the cables with vinyl tape, except the part
that connects to the ring terminal.
- 17 -
Outdoor unit
TB7
CN40 CN41 CN41 CN41
Outdoor unit
TB7
CN40 CN41 CN41 CN41