D.C. Inverter Multi-variable Modular
30
NO.N,(80max)
2
NO.1
NO.2
2
…
D1 D2
CN12
XT2
D1 D2 H1 H2
CN12
XT2
H1 H2
XT2
CN301
、
CN302
AP3
AP1
A
B
CN9
CN10
CN11
A
B
(CAN1)
CN1
CN2
CN3
AP4
CN301
CN302
A
B
CN44
CN45
P2
P1
F2
F1
XT3
G2
G1
D2
D1
XT2
L3
L2
L1
N
XT1
E
Module 3 (slave unit)
Main board
Communication
interface of VFD
Interface of
emergency
signal
Interface of
power network
switch signal
Communication
interface
Communication interface
of ODU/IDU
Inverter compressor
drive board
Power supply
Communication
interface
Inverter fan drive
board
CN301
、
CN302
AP3
AP1
A
B
CN9
CN10
CN11
A
B
(CAN1)
CN1
CN2
CN3
AP4
CN301
CN302
A
B
CN44
CN45
P2
P1
F2
F1
XT3
G2
G1
D2
D1
XT2
L3
L2
L1
N
XT1
E
Module 1 (master unit)
Main board
Communication
interface of VFD
Interface of
emergency
signal
Interface of
power network
switch signal
Communication
interface
Communication interface
of ODU/IDU
Inverter compressor
drive board
Power supply
Communication
interface
Inverter fan drive
board
CN301
、
CN302
AP3
AP1
A
B
CN9
CN10
CN11
A
B
(CAN1)
CN1
CN2
CN3
AP4
CN301
CN302
A
B
CN44
CN45
P2
P1
F2
F1
XT3
G2
G1
D2
D1
XT2
L3
L2
L1
N
XT1
E
Module 2 (slave unit)
Main board
Communication
interface of VFD
Interface of
emergency
signal
Interface of
power network
switch signal
Communication
interface
Communication interface
of ODU/IDU
Inverter compressor
drive board
Power supply
Communication
interface
Inverter fan drive
board
Communication between
ODU and IDU
Communication among basic modules
Communication among basic modules
Communication among IDUs
IDU
IDU
IDU
IDU
IDU
IDU
Wired controller
Wired controller
IDU main board
IDU main board
Main board
Communication
interface
Communication
interface
CN12
IDU main board
Communication
interface
Communication
interface
D1
D2
H1
H2
Prev. IDU
Communication
matched resistance
H1 H2
D1
D2
H1 H2
D1 D2
H1 H2
D1
D2
H1 H2
Prev. IDU
Next IDU
Next IDU
Connect with the
last slave module
Fig.37
4.6.2 Communication mode of GMV5 Modular DC Inverter Units
CAN bus mode is taken for communication between IDU and ODU and communication among IDUs.
4.6.3 Selection and connection mode of GMV5 communication material
4.6.3.1Select communication material
Note: if air conditioners are installed at places where there’s strong electromagnetic interference,
the communication wire of IDU and wired controller must use shielded wire and the communication
wire between IDU and IDU/ODU must use shielded twisted pair.
(1) Select communication wire between IDU and wired controller
Material type
Total length of
communication line
between IDU unit and
wired controller L (m)
Wire size
(mm
2
)
Material
standard
Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤250
2×0.75~2×1.25
IEC 60227-
5:2007
1. Total length of communication line
can't exceed 250m.
2. The cord shall be Circular cord (the
cores shall be twisted together).
3. If unit is installed in places with intense
magnetic field or strong interference, it is
necessary to use shielded wire.
