Mitsubishi Electric PAC-SF46EPA Manuel D'installation page 8

5 Transmission cable length limitation
Wiring example
The wiring depends on the system configuration. For details, refer to DATA BOOK.
Example <M-NET transmission line>
1 Transmission line for
centralized control
System controller
a
Power supply unit
for transmission line
PAC-SC50KUA
1 Transmission line for
centralized control
1 Transmission line for
centralized control
• Total wiring length: 500 m (1,640 ft) max.
The maximum allowable wiring length of the M-NET transmission line for centralized control system and for Indoor/Outdoor system is shown in
the formula below. Refer to the figure above for the alphabet in the formula.
If the calculated wiring length exceeds the maximum value, M-NET signal cannot be sent to the end-device and communication/control cannot be
made.
a+b+c+d 500 m (1,640 ft)
d+c+e+f 500 m (1,640 ft)
The maximum wiring length for local remote controller is 10 m (32 ft). The section that exceeds 10 m (32 ft) must be included in the total wiring
length (500 m (1,640 ft) max.)
1 Transmission line for centralized control: 200 m (656 ft) max.
The maximum allowable wiring length from the power supply unit, which is on the transmission line for centralized control, to each outdoor
unit and system controller is shown in the formula below. The value shows the maximum length that the power can be supplied to the
transmission line for centralized control. If the calculated length exceeds the maximum value, the power cannot be supplied to the end-device
and communication/control cannot be made.
a+b 200 m (656 ft)
h 200 m (656 ft)
2 Indoor/Outdoor transmission line: 200 m (656 ft) max.
The maximum allowable wiring length is shown in the formula below. The value shows the maximum length that the power can be supplied to
Indoor/Outdoor transmission line. If the length exceeds the maximum value, the power cannot be supplied to the end-device and
communication/control cannot be made.
d 200 m (656 ft)
8
2 Indoor/Outdoor
transmission line
b
Outdoor
unit
Indoor
unit
e
2 Indoor/Outdoor transmission line
f
Outdoor
unit
Indoor
unit
g
1 Transmission line for centralized control
T T
B B
2 3
Transmission
Booster
PAC-SF46EPA
LOSSNAY
a+b+e+f 500 m (1,640 ft)
d+c+e+g+h 500 m (1,640 ft)
a+b+e+g 200 m (656 ft)
c+d 200 m (656 ft)
c
T
B
2
Indoor
Transmission
unit
Booster
PAC-SF46EPA
MA remote controller line
MA remote
controller
10 m (32 ft)
M-NET remote
controller
h
10 m (32 ft)
LOSSNAY
LOSSNAY
remote
controller
a+b+e+g+h
f+g+h 500 m (1,640 ft)
f 200 m (656 ft)
d
T
B
10 m (32 ft)
3
Indoor
unit
LOSSNAY
M-NET
remote
controller
500 m (1,640 ft)
10 m
(32 ft)
LOSSNAY
remote
controller