Mitsubishi Electric SMART MULTI MXZ-SM36NAM2-U1 Data Book page 59

10. M-NET CONTROL
10-3-3. 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 MXZ-SM model and PUHY/PURY-TLMU/TKMU 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.
10-3-3-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.
10-3-3-B. When connecting to TB7 of the Outdoor/Heat source unit and receiving power from the Outdoor/Heat source unit.
(Not applicable to the MXZ-SM model and PUHY/PURY-TLMU/TKMU model)
Maximum 6 System controllers can be connected to TB7 and receiving
power from the Outdoor/Heat source unit.
(Not applicable to the MXZ-SM model and PUHY/PURY-TLMU/TKMU model)
It is necessary to replace power supply switch connector CN41 with
CN40 on one Outdoor/Heat source unit.
Note (only for PUHY/PURY model)
· When YLMU/YKMU Outdoor unit model is used, the male power
supply connector can be connected to CN40, and the
System controller can be connected to TB7 side.
· When the male power supply connector is connected from
TLMU/TKMU Outdoor unit to CN40, the power is supplied to TB7
side even when the main power of the TLMU/TKMU outdoor unit
is switched off, and the System controller may store an error in
the error history and emit an alarm signal.
· If only LOSSNAY units or outdoor units in different refrigerant circuits are connected to TB7 side, the male
power supply connector can be connected from TLMU/TKMU outdoor unit to CN40.
10-3-3-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 is needed. PAC-SF46EPA supplies
transmission power equal to 25 Indoor units.
CAUTION
■ AG-150A-A/EB-50GU-A*
are recommended to connect to TB7 because it performs back-up to a
1
number of data.
In an air conditioner system has more than 1 Outdoor/Heat source units, AG-150A-A/EB-50GU-A
receiving transmission power through TB3 or TB7 on one of the Outdoor/Heat source units would have
a risk that the connected Outdoor/Heat source unit failure would stop power supply to
AG-150A-A/EB-50GU-A and disrupt the whole system.
When applying apportioned electric power function, AG-150A-A/EB-50GU-A 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-A/EB-50GU-A.
*1: AG-150A-A is an example model of system controllers.
■ 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 10-3-2 for information about the power-supply capacity of each system controller
(EW-50A, BAC-HD150, LM-AP) to the low-level system controllers.
M-P0890
Fig. 10-3-3-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
Maximum 3 System controllers can be connected to TB3.
controller
Fig. 10-3-3-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
unit Group
TB3
TB7
Use CN41
as it is.
ME remote controller
System
controller
Fig. 10-3-3-C
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 central controller)
Outdoor
/Heat source
unit
TB3
TB7
Use CN41
as it is.
PAC-SC51KUA
ME remote controller
System
controller
Fig. 10-3-3-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
SMART MULTI
System
controller
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
Group Group
Indoor unit
Group Group
Indoor unit
Group Group
Indoor unit
Group Group
Indoor unit
57