11. M-NET CONTROL
11-3-3. Ensuring proper power supply to System controller
The power to System controller (excluding AE-200A, AE-50A, EW-50A, BAC-HD150, LM-AP) is supplied via M-NET transmission line. M-NET
transmission line at TB7 side is called Centralized control transmission line while one at TB3 side is called Indoor-Outdoor/Heat source transmission
line. There are 3 ways to supply power to the System controller .
A) Connecting to TB3 of the Outdoor/Heat source unit and receiving power from the Outdoor/Heat source unit.
B) Connecting to TB7 of the Outdoor/Heat source unit and receiving power from the Outdoor/Heat source unit.
(Not applicable to the PUMY model)
C) Connecting to TB7 of the Outdoor/Heat source unit but receiving power from power supply unit PAC-SC51KUA.
* System controllers (AE-200A, AE-50A, EW-50A, BAC-HD150, LM-AP) have a built-in function to supply power to the M-NET transmission
lines, so no power needs to be supplied to the M-NET transmission lines from the Outdoor/Heat source units or from PAC-SC51KUA.
11-3-3-A. When connecting to TB3 of the Outdoor/Heat source unit and receiving power from the
Outdoor/Heat source unit.
Maximum 3 System controllers can be connected to TB3.
If there is more than 1 Outdoor/Heat source unit, it is
necessary to replace power supply switch connector CN41
with CN40 on one Outdoor/Heat source unit.
11-3-3-B. When connecting to TB7 of the Outdoor/Heat source unit and receiving power from the Outdoor/Heat source unit.
(Not applicable to the PUMY model)
A maximum of 6 system controller are connectable to TB3 and TB7 of
Outdoor/Heat source unit.
(Not applicable to the PUMY model)
It is necessary to replace power supply switch connector CN41 with
CN40 on one Outdoor/Heat source unit.
11-3-3-C. When connecting to TB7 of the Outdoor/Heat source unit but receiving power from PAC-SC51KUA.
When using PAC-SC51KUA to supply transmission power, the
power supply connector CN41 on the Outdoor/Heat source units
should be kept as it is. It is also a factory setting.
1 PAC-SC51KUA supports maximum 1 AG-150A-A or
1 EB-50GU-A 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.
If System controller, ON/OFF controller connected to TB7 consume
transmission power more than 5 (Indoor units), Transmission
booster PAC-SF46EPA-G is needed. PAC-SF46EPA-G supplies
transmission power equal to 25 Indoor units.
CAUTION
■ How to connect system controllers (AE-200A, AE-50A, EW-50A, BAC-HD150, LM-AP) to a given system
System controllers (AE-200A, AE-50A, EW-50A, BAC-HD150, LM-AP) have a built-in function to supply
power to the M-NET transmission lines, so no power needs to be supplied to the M-NET transmission lines
from the Outdoor/Heat source units or from PAC-SC51KUA.
Leave the power supply connector on the Outdoor/Heat source unit connected to CN41 as it is.
Refer to 11-3-2 for information about the power-supply capacity of each system controller
(EW-50A, BAC-HD150, LM-AP) to the low-level system controllers.
MEES21K047
Fig. 11-3-3-A
M-NET transmission lines
(Indoor-Outdoor/Heat source transmission lines)
Outdoor
/Heat source
unit
Group
TB3
TB7
Replacement of
CN41 with CN40
M-NET transmission lines
(transmission lines
MA remote controller
for central controller)
Outdoor
/Heat source
unit
Group
TB3
TB7
Use CN41
as it is.
ME remote controller
System
controller
Fig. 11-3-3-B
M-NET transmission lines
(Indoor-Outdoor/Heat source transmission lines)
Outdoor
/Heat source
unit
Group
TB3
TB7
Replacement of
CN41 with CN40
M-NET transmission lines
(transmission lines
MA remote controller
for central controller)
Outdoor
/Heat source
Group
unit
TB3
TB7
Use CN41
as it is.
ME remote controller
System
controller
Fig. 11-3-3-C
M-NET transmission lines
(Indoor-Outdoor/Heat source transmission lines)
Outdoor
/Heat source
unit
Group
TB3
TB7
Use CN41
as it is.
M-NET transmission lines
(transmission lines
MA remote controller
for central controller)
Outdoor
/Heat source
unit
Group
TB3
TB7
Use CN41
as it is.
PAC-SC51KUA
ME remote controller
System
controller
Fig. 11-3-3-D
M-NET transmission lines
(Indoor-Outdoor/Heat source transmission lines)
Outdoor
/Heat source
unit
TB3
TB7
Use CN41
as it is.
M-NET transmission lines
(transmission lines
MA remote controller
for centralized controller)
Outdoor
/Heat source
unit
TB3
TB7
Use CN41
as it is.
ME remote controller
System
controller
WR2-Series-575V
System
controller
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
Group
Group
Indoor unit
Group
Group
Indoor unit
102