213
2. M-NET control
SYSTEM DESIGN
S.D. WR2
MEE15K036
Maximum 6 System controllers can be connected to TB7.
System
controller
CAUTION
M-NET transmission lines
(transmission lines
for centralized controller)
MA remote controller
ME remote controller
Group
Group
Group
Group
Indoor unit
Indoor unit
TB3
Heat source unit
Heat source unit
Use CN41
as it is.
Use CN41
as it is.
System
controller
TB7
TB7
TB3
M-NET transmission lines
(Indoor-Heat source transmission lines)
2-3-3-B. When connecting to TB7 of the Heat source unit and receiving power from the Heat source unit.
Maximum 3 System controllers can be connected to TB3.
If there is more than 1 Heat source unit, it is necessary to
replace power supply switch connector CN41 with CN40 on
one Heat source unit.
Maximum 6 System controllers can be connected to TB7 and
receiving power from the Heat source unit.
It is necessary to replace power supply switch connector
CN41 with CN40 on one Heat source unit.
2-3-3-A. When connecting to TB3 of the Heat source unit and receiving power from the Heat source unit.
2-3-3-C. When connecting to TB7 of the Heat source unit but receiving power from PAC-SC51KUA.
2-3-3. Ensuring proper power supply to System controller
Heat source unit
MA remote controller
Group
Group
Indoor unit
M-NET transmission lines
(transmission lines
for central controller)
Heat source unit
ME remote controller
Group
Group
Indoor unit
Replacement of
CN41 with CN40
Use CN41
as it is.
TB7
TB3
M-NET transmission lines
(Indoor-Heat source transmission lines)
TB7
TB3
System
controller
Maximum 3 System controllers can be connected to TB3.
Fig. 2-3-3-A
M-NET transmission lines
(transmission lines
for central controller)
MA remote controller
ME remote controller
Group
Group
Group
Group
Indoor unit
Indoor unit
TB3
Heat source unit
Heat source unit
Replacement of
CN41 with CN40
Use CN41
as it is.
System
controller
TB7
TB7
TB3
M-NET transmission lines
(Indoor-Heat source transmission lines)
Fig. 2-3-3-B
PAC-SC51KUA
M-NET transmission lines
(transmission lines
for central controller)
MA remote controller
ME remote controller
Group
Group
Group
Group
Indoor unit
Indoor unit
TB3
Heat source unit
Heat source unit
Use CN41
as it is.
Use CN41
as it is.
System
controller
TB7
TB7
TB3
M-NET transmission lines
(Indoor-Heat source transmission lines)
Fig. 2-3-3-C
When using PAC-SC51KUA to supply transmission power, the
power supply connector CN41 on the Heat source units should
be kept as it is. It is also a factory setting.
1 PAC-SC51KUA supports maximum 1 AG-150A or
1 EB-50GU-J 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 is needed. PAC-SF46EPA
supplies transmission power equal to 25 Indoor units.
The power to System controller (excluding AE-200E, AE-50E, EW-50E, 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-Heat source
transmission line. There are 3 ways to supply power to the System controller.
A) Connecting to TB3 of the Heat source unit and receiving power from the Heat source unit.
B) Connecting to TB7 of the Heat source unit and receiving power from the Heat source unit.
C) Connecting to TB7 of the Heat source unit but receiving power from power supply unit PAC-SC51KUA.
* System controllers (AE-200E, AE-50E, EW-50E, 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 Heat source units or from PAC-SC51KUA.
Fig. 2-3-3-D
■AG-150A/EB-50GU-J*
1
are recommended to connect to TB7 because it performs back-up to a
number of data.
In an air conditioner system has more than 1 Heat source units, AG-150A/EB-50GU-J receiving
transmission power at TB3 or TB7 on one of the Heat source units would have a risk that the
connected Heat source unit failure would stop power supply to AG-150A/EB-50GU-J, and disrupt
the whole system.
When applying apportioned electric power function, AG-150A/EB-50GU-J are necessary to
connected to TB7 and has its own power supply unit PAC-SC51KUA.
Note: Power supply unit PAC-SC51KUA is for AG-150A/EB-50GU-J.
*1: AG-150A is an example model of system controllers.
■How to connect system controllers (AE-200E, AE-50E, EW-50E, BAC-HD150, LM-AP) to a given system
System controllers (AE-200E, AE-50E, EW-50E, 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 Heat source units or from PAC-SC51KUA.
Leave the power supply connector on the Heat source unit connected to CN41 as it is.
Refer to 2-3-2 for information about the power-supply capacity of each system controller
(EW-50E, BAC-HD150, LM-AP) to the low-level system controllers.
0000003813.BOOK 213 ページ ２０１５年１１月１１日 水曜日 午後４時４分
