Publicidad
Idiomas disponibles
Idiomas disponibles
[ Caution ]
When the IDUs are provided with a uniform power supply, if the IDUs in the same refrigerant system are V8 IDUs, then
IDUs and ODU can communicate either via HyperLink with a uniform power supply, or via P/Q. If some of the IDUs in
the same refrigerant system are non-V8 series, then IDUs and ODU can only communicate via P/Q or P/Q/E
communication.
Both P/Q communication and HyperLink communication (M1M2) are indoor and outdoor communication, and only one
of them can be selected. Do not connect P/Q communication and HyperLink communication at the same time in the
same system. Do not connect HyperLink communication to P/Q or D1D2 communication.
[ Note ]
V8 IDUs: with V8 printed on the packaging carton
Independent power supply: With separate circuit breakers, the power supply for each IDU can be controlled
independently.
Uniform power supply: All the IDUs in the system are controlled by one circuit breaker.
Repeater: power supply repeater, which is used to compensate for the pressure drop due to excessive length of line or
line resistance when the main control board of the ODU provides an independent power supply for IDUs through the
HyperLink communication line. It is only used in refrigerant systems where IDUs are provided with an independent
power supply.
4
Communication line connection
1. Selection of communication method for IDUs
Equipped with independently developed HyperLink (M1M2) communication, V8 series IDUs also preserve the previous
RS-485 (PQE) communication method. They are compatible with non-V8 IDUs. Pay attention to the type of IDU you have
purchased before connecting communication lines. Please refer to the following table to select an appropriate
communication method.
IDU type
Are all the IDUs in the
system V8 series
Are some of the IDUs in the
system non-V8 series
Optional communication method
between IDUs and ODU
HyperLink (M1M2) communication
RS-485 (PQ) communication
RS-485 (PQE) communication
46
Installation
Remarks
1. Independent power supply for IDUs*.
2. Any topology connection of
communication lines.
3. Two-core and non-polar
communication for M1M2.
1. The IDUs need to be powered
uniformly.
2. The communication cables must be
connected in serial.
3. Two-core and non-polar
communication for PQ.
1. The IDUs need to be powered
uniformly.
2. The communication cables must
be connected in serial.
3. PQE cables must be 3-core and
PQ non-polar.
Publicidad
