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5-2. M-NET transmission line length
• Connect the GB-50ADA to the transmission line for centralized control (TB7 on the outdoor unit).
• There should only be one power supply source within a single M-NET transmission circuit. The factory setting is to supply
power from GB-50ADA.
• Provide an earth for the indoor-outdoor transmission lines at one single outdoor unit.
• Maximum line distance
500 m (1640 ft)
*1
• Maximum power supply distance
200 m (656 ft)
*1
(1) Maximum line distance
1
L1 + L2 + 5 + 1 + 2 ( 3)
500m (1640 ft)
2
L1 + L2 + 5 + 4
500m (1640 ft)
3
L1 + L3 + 6 + 7 ( 8)
500m (1640 ft)
4
2 ( 3) + 1 + 5 + L2 + L3 + 6 + 7 ( 8)
500m (1640 ft)
5
4 + 5 + L2 + L3 + 6 + 7 ( 8)
500m (1640 ft)
(2) Power supply distance for the indoor-outdoor transmission lines
1
5 + 1 + 2 ( 3)
200m (656 ft)
2
5 + 4
200m (656 ft)
3
6 + 7 ( 8)
200m (656 ft)
(3) Power supply distance for the centralized control transmission lines
1
L1 + L2
200m (656 ft)
2
L1 + L3
200m (656 ft)
Maximum power supply distance is the distance in which a power supply unit (or an outdoor unit designated as a power
supply unit) is capable of supplying power to other units on the receiving end, such as remote controllers and indoor
units.
CAUTION
*1 The ME remote controller wiring length ( 3, 8) should be 10 m (32 ft) or less.
The length that exceeds 10 m (32 ft) needs to be included in the maximum distance to the farthest unit (500 m (1640 ft)) and
in the maximum power supply distance (200 m (656 ft)).
*2 If the ME remote controller wiring length ( 3, 8) is 10 m (32 ft) or less, it does not need to be included in the maximum
distance to the farthest unit.
L1
1
2
3
4
6
7
8
L2
L3
LAN
LAN
5
Centralized
Controller
(GB-50ADA)
Wiring example
M-NET
(For centralized control)
Outdoor
unit
Outdoor
unit
Outdoor
unit
Outdoor
unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
M-NET (For indoor-outdoor transmission line)
ME remote controller
M-NET transmission line
(Transmission line for
centralized control)
M-NET transmission line
(indoor-outdoor
transmission line)
ME remote controller
CN40
ON
CN41
OFF
* Connect the power jumper of the
outdoor unit to CN41 (does not supply
power).
outdoor unit
