M-Net Transmission Line Length - Mitsubishi Electric BAC-HD150 Installation Manual

3-2. M-NET transmission line length

• Connect the BAC-HD150 to the transmission line for centralized control (TB7 on the outdoor unit).
• There should only be one power supply source within a single transmission circuit. The factory setting is that power is not
supplied from the BAC-HD150.
• Connect the shield of the M-NET transmission line for centralized control to the S terminal of TB3.
Provide an earth for the indoor-outdoor transmission lines at one single outdoor unit.
• Maximum line distance Maximum 500 m/1,640 ft*
• Maximum power supply distance Maximum 200 m/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.
Sample wiring connection
BACnet (LAN)
BM ADAPTER
(BAC-HD150)
M-NET transmission line
(centralized control)
M-NET transmission line
(indoor-outdoor)
BACnet (LAN)
(1) Maximum line distance
1 L1 + L2 + 5 + 1 + 2 ( 3)
2 L1 + L2 + 5 + 4
3 L1 + L3 + 6 + 7 ( 8)
4 2 ( 3) + 1 + 5 + L2 + L3 + 6 + 7 ( 8)
5 4 + 5 + L2 + L3 + 6 + 7 ( 8)
(2) Power supply distance for the indoor-outdoor transmission lines
1 5 + 1 + 2 ( 3)
2 5 + 4
3 6 + 7 ( 8)
(3) Power supply distance for the centralized control transmission lines
1 L1 + L2
2 L1 + L3
Note
*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/1,640 ft) and
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.
1, 2
M-NET
(For centralized control)
L1 Outdoor
unit
Outdoor
unit
L3 L2
Outdoor
unit
Outdoor
unit
500 m/1,640 ft
500 m/1,640 ft
500 m/1,640 ft
500 m/1,640 ft
500 m/1,640 ft
200 m/656 ft
200 m/656 ft
200 m/656 ft
200 m/656 ft
200 m/656 ft
- 10 -
1
M-NET (For indoor-outdoor transmission line)
1
Indoor unit
3
5
ME remote controller
Indoor unit
6
Indoor unit
8
ME remote controller
* To supply power from the BAC-HD150,
check that the power jumper is
connected to CN41. Refer to section
4-3 for details.
2
Indoor unit Indoor unit
4
Indoor unit Indoor unit
7
Indoor unit Indoor unit
CN40 CN41
outdoor unit