Mitsubishi Electric PURY-WP-YJM-A Data Book page 182

2. M-NET control
2-3-3. Ensuring proper power supply to the system controller
The power to system controller (excluding LMAP04-E) is supplied via the M-NET transmission line. The M-NET transmission
line at TB7 side is called the centralized control transmission line while one at TB3 side is called indoor-outdoor transmission
line. There are 3 ways to supply power to the system controller .
A) Connecting to TB3 of the outdoor unit and receiving power from the outdoor unit.
B) Connecting to TB7 of the outdoor unit and receiving power from the outdoor unit.
C) Connecting to TB7 of the outdoor unit but receiving power from power supply unit PAC-SC51KUA.
2-3-3-A. When connecting to TB3 of the outdoor unit and receiving power from the outdoor unit.
A maximum of 3 system controllers can be connected to
TB3. If there is more than 1 outdoor unit, it is necessary to
replace power supply switch connector CN41 with CN40
on one outdoor unit.
2-3-3-B. When connecting to TB7 of the outdoor unit and receiving power from the outdoor unit.
A maximum of 6 System controllers can be connected to
TB7 and receive power from the outdoor unit.
It is necessary to replace the power supply switch
connector CN41 with CN40 on one outdoor unit.
2-3-3-C. When connecting to TB7 of the outdoor unit but receiving power from PAC-SC51KUA.
When using PAC-SC51KUA to supply transmission
power, the power supply connector CN41 on the outdoor
units should be kept as it is. It is also a factory setting.
1 PAC-SC51KUA supports a maximum 1 AG-150A unit
due to the limited power 24VDC at its TB3.
However, 1 PAC-SC51KUA supplies transmission power
at its TB2 equal to 5 indoor units, which is referable at
Table 2-3-2.
If PZ-52SF-E, system controller, ON/OFF controller
connected to TB7 consume transmission power of more
than 5 (indoor units), transmission booster PAC-SF46EPA
is needed. PAC-SF46EPA supplies transmission power
equal to 25 indoor units.
CAUTION
AG-150A* 1 is recommended to connect to TB7 because it performs back-up to a number of data points.
In an air conditioner system which has more than 1 outdoor unit, with AG-150A receiving transmission power through TB7 on one of the outdoor units, there
is a risk that the connected outdoor unit failure would stop power supply to AG-150A, and disrupt the whole system.
When applying apportioned electric power function, AG-150A must be connected to TB7 and have its own power supply unit PAC-SC51KUA.*
*1: AG-150A is an example model of system controllers.
*2: Power supply unit PAC-SC51KUA is for AG-150A.
Fig. 2-3-3-A
Outdoor unit
TB3
TB7
Replacement of
CN41 with CN40
M-NET transmission lines
(transmission lines
for centralized controller)
Outdoor unit
TB3
TB7
Use CN41
as it is.
System
controller
Fig. 2-3-3-B
M-NET transmission lines
(Indoor-Outdoor transmission lines)
Outdoor unit
TB3
TB7
Replacement of
CN41 with CN40
M-NET transmission lines
(transmission lines
for centralized controller)
Outdoor unit
TB3
TB7
Use CN41
as it is.
System
A maximum of 6 System controllers can be connected to TB7.
controller
Fig. 2-3-3-C
M-NET transmission lines
(Indoor-Outdoor transmission lines)
Outdoor unit
TB3
TB7
Use CN41
as it is.
M-NET transmission lines
(transmission lines
for centralized controller)
Outdoor unit
TB3
TB7
Use CN41
as it is.
PAC-SC51KUA
System
controller
SYSTEM DESIGN
M-NET transmission lines
(Indoor-Outdoor transmission lines)
Group
MA remote controller
Group
ME remote controller
A maximum of 3 System controllers can be connected to TB3.
Group
MA remote controller
Group
ME remote controller
Group
MA remote controller
Group
ME remote controller
System controller
(excluding LMAP04-E)
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
2
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