INVT GD300L-004G-4 User Manual

Goodrive300-LIFT series inverter Communication protocol
-115-
PC
Inverter
EarthA B
B
A
Earth
485+ 485-
RS485 line
RS232-RS485
converter
Shielded twisted pair
Figure 10-1 RS485 physical connection in single application
10.3.1.2 Multi-application
In the real multi-application, the chrysanthemum connection and star connection are commonly used.
Chrysanthemum chain connection is required in the RS485 industrial fieldbus standards. The two
ends are connected to terminal resistors of 120Ω which is shown as Figure 10-2. Figure 10-3 is the
simply connection figure and Figure 10-4 is the real application figure.
1# 2# 3# 4# 32#
120Ω
120Ω
Figure 10-2 Chrysanthemum connection
Figure 10-3 Simplified chrysanthemum connection
INVT
inverter
INVT
inverter
Address 1
INVT
inverter
Address n
Earth
485+
485-
Earth
485+
485-
Earth
485+
485-
PC
GND
RS232-485
converter
Max. length of
RS232 cable:
15 m
Shielded twisted pair
120Ω terminal
resistor
Address 2
Figure 10-4 Chrysanthemum connection applications

INVT GD300L-004G-4 Specifications

General

Brand	INVT
Model	GD300L-004G-4
Category	Inverter
Language	English