Fuji Electric FRENIC-Ace series - Page 531

9.1 Overview of RS-485 Communication
9-7
COMMUNICATION FUNCTIONS
Chap 9
Multi-drop connection using the RS-485 communication port 2 (on the terminal block) (only for FRN-E2
■
-2/4/7GB,-4C)
Terminating
resistor
(112 Ω)
Shield
Using the built-in
terminating resistor
Up to 31
inverters
Host equipment
USB or RS-232C
Host equipment
RS-485
(4 wires)
SD OUT- OUT+ IN- IN+
USB - RS-485 converter
or
RS-232C - RS-485 converter
Off-the-shelf one
(2 wires)
FRENIC-Ace series
Inverter 1
Station No.: 01
(2 wires)
DX+
DX
-
SD
FRENIC-Ace series
Inverter n
Station No.: n
(2 wires)
DX+
DX
-
SD
FRENIC-Ace series
Inverter 2
Station No.: 02
(2 wires)
DX+
DX
-
SD
Terminating resistors switch
SW6 ON
(112 Ω)
TRD+
TRD-
FG
TXD RXD
Figure 9.1-3 Multi-drop Connection Diagram (Connecting to the Terminal Block)
Use the cables and converters meeting the modes for connecting the RS-485 communication ports.
(Refer to
“[ 3 ] Requirements for the cable (COM port 2: for RS-485 connector)” in “9.1.4 RS-
485
connection devices
.”)