Gree GMV5 Series Service Manual

GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
309
 The power input should be 100VAC-240VAC, 50/60Hz.
 Do not touch the input port of the power supply when the gateway is energized.
 Modbus gateway is recommended to install near air conditioning units so as to shorten their
communication distance. The maximum allowable communication distance of them is 500 m. For
the communication distance between Modbus gateway and Gree CAC Remote Monitoring
System/BMS system, we can use optoelectronic isolated repeaters for expansion.
 The power lines and communication lines of Modbus gateways should be laid separately; otherwise,
Modbus gateways may become faulty. In the preceding figure, the thin dotted line indicates
communication lines and the thick dotted line indicates strong current lines; they are for reference
only.
 Control cabinets should be designed to satisfy Modbus gateways both in number and layout as well
as location.
 Each Modbus gateway should be supplied with power independently. Therefore, you should install
as many 220V AC power sockets as possible in the control cabinet. It is not allowed to connect
multiple Modbus gateways to a same power socket.
 Make sure to keep at least 15 cm between communication lines and strong current lines. It is
forbidden to bind them together. If their distance is less than 15 cm, put them into shield tubes
respectively to prevent electromagnetic disturbance.
 The control cabinet must be installed indoors. Avoid knock or exposure to sunshine or rain. It should
be locked as well to avoid body contact.
(3) Communication System Installation
The Modbus gateway works to get through the communication
1) Between the Modbus gateway and the Gree Web-based Remote Monitoring and Control
System/BMS.
2) Between the Modbus gateway and the air conditioning system.
(1) Selection of Communication Lines
1) Communication lines between the Modbus gateway and the Gree Web-based Remote
Monitoring and Control System/BMS
Type
Size
Applicable Standard
Remarks
Category five
twisted pairs
24AWG (2

0.6
mm)
TIA/EIA-568-A
An optoelectronic repeater is required when
the communication distance is more than
800 m.
2) Communication lines between the Modbus gateway and the air conditioning system
Type
Length m(feet)
Wire size
Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
L≤500(1640)
≥2×AWG18
1. If the wire diameter is enlarged to 2×AWG16, the total
communication line length can reach 800 m (2625 feet).
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.

Gree GMV5 Series Specifications

General

Brand	Gree
Model	GMV5 Series
Category	Inverter
Language	English