Mitsubishi Electric CITY MULTI H Series Manual page 11

2. M-NET control
2-3-3. Ensuring proper power supply to System controller
The power to System controller (excluding LMAP03-U) is supplied via M-NET transmission line. M-NET transmission line
at TB7 side is called Central 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.
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.
2-3-3-B. When connecting to TB7 of the Outdoor unit and receiving power from the Outdoor unit.
Maximum 3 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.
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 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, Timers, 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 / G-50A 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 / G-50A receiving transmission power through TB3 or TB7 on one of the Outdoor units
would have a risk that the connected Outdoor unit failure would stop power supply to AG-150A / G-50A, and disrupt the whole system.
When applying apportioned electric power function, AG-150A / G-50A is necessary to connected to TB7 and has its own power supply unit
PAC-SC51/50KUA.*
*Power supply unit PAC-SC50KUA is for G-50A, and 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 central 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 central controller)
Outdoor unit
TB3
TB7
Use CN41
as it is.
System
Maximum 3 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 central 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
Maximum 3 System controllers can be connected to TB3,
but maximum 2 in the case of G-50A.
Group
MA remote controller
Group
ME remote controller
Group
MA remote controller
Group
ME remote controller
DATA U5
System controller
(excluding LMAP03-E)
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
Group
Indoor unit
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