2. M-NET control
YKB/YLM 2nd
4 - 82
S.D. R2
MEE15K022
PAC-SC51KUA
Outdoor unit
MA remote controller
Group
Group
Indoor unit
M-NET transmission lines
(transmission lines
for centralized controller)
M-NET transmission lines
(transmission lines
for centralized controller)
Outdoor unit
ME remote controller
MA remote controller
ME remote controller
Group
Group
Group
Group
Group
Group
Indoor unit
Indoor unit
Indoor unit
Replacement of
CN41 with CN40
Use CN41
as it is.
TB7
TB3
TB3
Outdoor unit
Outdoor unit
Replacement of
CN41 with CN40
Use CN41
as it is.
System
controller
M-NET transmission lines
(Indoor-Outdoor transmission lines)
TB7
TB3
System
controller
TB7
TB7
TB3
Maximum 3 System controllers can be connected to TB3.
Maximum 6 System controllers can be connected to TB7.
M-NET transmission lines
(transmission lines
for centralized controller)
MA remote controller
ME remote controller
Group
Group
Group
Group
Indoor unit
Indoor unit
TB3
Outdoor unit
Outdoor unit
Use CN41
as it is.
Use CN41
as it is.
System
controller
TB7
TB7
TB3
M-NET transmission lines
(Indoor-Outdoor transmission lines)
M-NET transmission lines
(Indoor-Outdoor transmission lines)
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
Outdoor unit
Outdoor unit
Use CN41
as it is.
Use CN41
as it is.
System
controller
TB7
TB7
TB3
M-NET transmission lines
(Indoor-Outdoor transmission lines)
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-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.
* 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 outdoor units or from PAC-SC51KUA.
Maximum 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.
Maximum 6 System controllers can be connected to TB7
and receiving power from the Outdoor unit.
It is necessary to replace power supply switch connector
CN41 with CN40 on one Outdoor unit.
Fig. 2-3-3-A
Fig. 2-3-3-B
Fig. 2-3-3-C
2-3-3-A. When connecting to TB3 of the Outdoor unit and receiving power from the Outdoor unit.
2-3-3-B. When connecting to TB7 of the Outdoor unit and receiving power from the Outdoor unit.
2-3-3-C. When connecting to TB7 of the Outdoor unit but receiving power from PAC-SC51KUA.
2-3-3. Ensuring proper power supply to System controller
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 P
AC-SC51KUA supports 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 more than 5 (Indoor units),
Transmission booster PAC-SF46EPA is needed. PAC-SF46EP
A
supplies transmission power equal to 25 Indoor units.
Fig. 2-3-3-D
■
AG-150A*
1
is recommended to connect to TB7 because it performs back-up to a number of data.
In an air conditioner system has more than 1 Outdoor units, AG-150A receiving transmission power
through TB7 on one of the Outdoor units would have 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 is necessary to connected to TB7 and has
its own power supply unit PAC-SC51KUA.*
2
*1: AG-150A is an example model of system controllers.
*2: Power supply unit PAC-SC51KUA is for AG-150A.
■
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 outdoor units or from PAC-SC51KUA.
Leave the power supply connector on the outdoor 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.
