Gree GMV-224WM/B-X Owner's Manual page 33

Module 3 (slave unit)
Main board
Communication interface
Communication Interface of Interface of
interface of VFD emergency power network (CA N1)
signal switch signal
CN1
CN9
CN44 CN45 CN2
CN10
A
CN3
CN11
B
A
XT3
B
D1
F1 F2 P1 P2
Communication
interface
CN301、CN302
Inverter compressor
drive board
AP3
A
XT1
CN301
B L1 L2 L3 N
CN302
Communication
Power supply E
interface
Inverter fan drive
board
AP4
Communication between
ODU and IDU
2
IDU
NO.1
IDU main board
Communication
IDU IDU
CN12
interface
D1 D2 H1 H2
X T2
D1 D2 H1 H2
Connect with the
last slave module
Prev. IDU
Next IDU
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
Total length of
communication line
Material type
between IDU unit and
wired controller L (m)
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
Module 2 (slave unit)
AP1
Communication Interface of
of ODU/IDU
interface of VFD emergency
signal
CN9
CN44
CN10
A
CN11
B
A
XT2
B
D2 G1 G2
F1
Communication
interface
CN301、CN302
Inverter compressor
drive board
AP3
A
CN301
B
CN302
Communication
interface
Inverter fan drive
board
AP4
Communication among basic modules
Communication among IDUs
2
...
IDU
NO.N,(80max)
IDU
NO.2
Wired controller
IDU main board
Communication
CN12
interface
D1 D2 H1 H2
X T2
D1 D2 H1 H2
Next IDU
Wire size
(mm
L≤250 2×0.75~2×1.25
D.C. Inverter Multi-variable Modular
Main board
AP1
Communication interface
Interface of
of ODU/IDU
power network (CA N1)
switch signal
CN1
CN45 CN2
CN3
XT2
XT3
D1 D2 G1 G2
F2 P1 P2
XT1
L1 L2 L3 N
Power supply E
Communication among basic modules
IDU main board
Communication
IDU
interface
D1 D2
X T2
D1 D2
Communication
Prev. IDU
matched resistance
Main board
Communication
interface
H1 H2
Wired controller
Fig.37
Material
2
) standard
1. Total length of communication line
can't exceed 250m.
2. The cord shall be Circular cord (the
IEC 60227-
cores shall be twisted together).
5:2007
3. If unit is installed in places with intense
magnetic field or strong interference, it is
necessary to use shielded wire.
30
Module 1 (master unit)
Communication Interface of Interface of
interface of VFD emergency power network
signal switch signal
CN9
CN44 CN45
CN10
A
CN11
B
A
XT3
B
F1 F2 P1 P2
Communication
interface
CN301、CN302
Inverter compressor
drive board
AP3
A
XT1
CN301
B L1 L2 L3 N
CN302
Communication
Power supply E
interface
Inverter fan drive
board
AP4
CN12
H1 H2
H1 H2
Remarks
Main board
AP1
Communication interface
of ODU/IDU
(CA N1)
CN1
CN2
CN3
XT2
D1 D2 G1 G2