Fuji Electric FRENIC-VG Series - Connection Method

5-4
5.1.3 Connection method
(1) Multi-drop connection using the RS-485 communications port
Figure 5.1 Multi-drop Connection Diagram (Connecting to the Terminal Block)
Use cables and converters meeting the specifications for proper connection to the RS-485
port. (Refer to Section 5.1.4 "Communications support devices.")
The shield must be earthed on the host device side.
Host equipment
USB or RS-232C
Host equipment
RS-485
SD OUT- OUT+ IN- IN+
USB - RS-485 converter
or
RS-232C - RS-485 converter
commercially-available
FRENIC-VG series
Inverter 1
DX＋
DX－
FRENIC-VG series
Inverter 2
DX＋
DX－
FRENIC-VG series
Inverter n
DX＋
DX－
Terminating
resistor
(112 Ω)
(4-wire)
Shield
(2-wire)
Station No. 01
Station No. 02
Station No.
n
Using the built-in
terminating resistor
Up to 31
inverters
Switching terminating
resistors
SW4
(2-wire)
(2-wire)
(2-wire)