M-Net Transmission Cable Length - Mitsubishi Electric EW-50A Installation And Instruction Manual

6-3. M-NET transmission cable length

Observe the maximum total length of M-NET transmission cables to ensure proper signal transmission to and from
the connected equipment over the M-NET transmission cables. If the maximum total length is exceeded, the M-NET
signals will be attenuated, resulting in communication error and control failure.
● Maximum total length of M-NET transmission cables: 500 m (1640 ft)
● Maximum total length of power feed: 200 m (656 ft)
<Example>
Centralized control transmission cables
Centralized controller
EW-50
(1) Maximum total length of M-NET transmission cables
a + c + d (e)
a + b + f
d (e) + c + b + f
(2) Maximum total length of power feed for the indoor-outdoor transmission cables
f ≤ 200 m (656 ft)
c + d (e) ≤ 200 m (656 ft)
(3) Maximum total length of power feed for the centralized control transmission cables
a ≤ 200 m (656 ft)
a + b ≤ 200 m (656 ft)
Note
● The M-NET remote controller cable length should be 10 m (32 ft) or shorter. The length that exceeds 10 m (32 ft) needs to be
included in the maximum total length of M-NET transmission cables (500 m (1640 ft)) and in the maximum total length of the
power feed (200 m (656 ft)).
● If the M-NET remote controller cable is shorter than 10 m (32 ft), the length does not need to be included in the maximum
total length.
WT07417X01
Indoor-outdoor transmission cables
a
Outdoor unit
b
Outdoor unit
≤ 500 m (1640 ft)
≤ 500 m (1640 ft)
≤ 500 m (1640 ft)
c d
Indoor unit Indoor unit
Indoor unit
e
f
Indoor unit Indoor unit
25
10 m (32 ft)
M-NET remote
controller