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CAUTION
• Both of PAC-SC50KUA and Outdoor unit can supply DC power to the M-NET transmission line.
Set the outdoor unit central control system transmission line power supply to the factory setting CN41 (no supply). For further
details, refer to the installation manual of the outdoor unit. Not doing so may cause unit failure or fire.
NOTE
The shied wire of M-NET transmission line shall be grounded by one point similar to earthing (grounding) method.
The shield wire shall be connected to the S terminal of only one unit on the common transmission line.
After connection for the each cable, fasten each cable with the cable fixture.
5 Allowable length of M-NET Transmission Lines
• Maximum length of M-NET transmission
• Maximum power feeding length
NOTE
* 1: Not including the remote control cables up to 10m (32 ft) in length. If the remote control cable exceeds 10m (32 ft), the excess
must be added to the total length in order to avoid exceeding the maximum length.
Example
Central
controller
DC Power
supply
(DC12V)
Length: max.10m (32 ft)
M-NET transmission line
(Centralized control line)
M-NET transmission line
(Indoor control line)
1) Maximum length of M-NET transmission
1 L2+L3+L4+r1+r2+r3 (r4)
2 L2+L3+L4+r1+r5
3 L2+L3+L5+r6+r7 (r8)
4r3 (r4) +r2+r1+L4+L5+r6+r7 (r8) 500m/1640 ft
5 r5+r1+L4+L5+r6+r7 (r8)
2) Maximum power feeding length for the indoor control line
1 r1+r2+r3 (r4) 200m/656 ft
2 r1+r5
200m/656 ft
3) Maximum power feeding length for the centralized control line
1 L1 +L2
200m/656 ft
2 L1 +L3+L4 (L5) 200m/656 ft
NOTE
If the remote control cable (r4,r8) do not exceed 10m (32 ft) in length, the length for r4,r8 may not consider to the total length.
500m/1640 ft *1
200m/656 ft
L2
L3
L4
Outdoor
unit
L1
Power
supply
unit
L5
Outdoor
500m/1640 ft
500m/1640 ft
500m/1640 ft
500m/1640 ft
r 2
r 1
Indoor
Indoor
r 4
Remote controller
Indoor
Indoor
r6
Indoor
Indoor
r8
Remote controller
– 6 –
r3
Indoor
r5
Indoor
r7
Indoor
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