Mitsubishi Electric PAC-SF46EPA-G Manual De Instalación página 9

• 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)
Example for LOSSNAY
Centralized controller
B
Power LOSSNAY
supply unit
A
unit
T T
B B
2 3
Transmission
Booster
LOSSNAY
unit
NOTES:
• If the total length of the remote controller's wiring is less than 10 m (32 ft), use 0.75 mm² (AWG18) cable, and do not add their lengths to the
length calculations made above.
• If the total length of the remote controller's wiring is more than 10 m (32 ft), use 1.25 mm² (AWG16) cable or ø1.2 mm or more shielded cable
for the length of wiring exceeding 10 m (32 ft), and be sure to add their lengths to the length calculations made above.
6 Supply capacity to transmission line
In order to ensure proper communication among Outdoor unit, Indoor unit, LOSSNAY, and OA processing unit GUF-RD(H), and Controllers, the
transmission power situation for the M-NET should be observed. In some cases, Transmission Booster should be used.
(1) Terminal block 1 for transmission line (TB2)
Power is not supplied to terminal block 1 for transmission line. (Supply capacity: 0)
(2) Terminal block 2 for transmission line (TB3)
The power supply coefficient of terminal block 2 for transmission line is 25.
Refer to the latest DATA BOOK for details about the power consumption coefficient of the connected unit model.
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)
D
C
LOSSNAY
unit
LOSSNAY
remote controller
E
LOSSNAY
unit
LOSSNAY
remote controller
a+b+e+g+h
f+g+h 500 m (1,640 ft)
f 200 m (656 ft)
Transmission line length limits
(1) Maximum distance between ends should be less than
500 m (1,640 ft).
Ex.) A+B+D+E,
A+B+C+E,
C+D
(2) Maximum distance from power supply should be less
than 200 m (656 ft).
Ex.) B+D, B+C, A, E
LOSSNAY
remote controller
LOSSNAY
remote controller
500 m (1,640 ft)
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