Wiring And Configuration Of Rs-485 Terminals - Mitsubishi Electric 800 Series Instruction Manual

5.15.2

Wiring and configuration of RS-485 terminals

RS-485 terminal layout
Terminating resistor switch
Initially-set to "OPEN".
Set only the terminating resistor switch of
the remotest inverter to the "100Ω" position.
P5S SG SDA1
(VCC) (GND) (TXD1+)
OPEN
VCC GND + TXD
100Ω
VCC GND + TXD
P5S SG SDA2
(VCC) (GND) (TXD2+)
Connection of RS-485 terminals and wires
• The size of RS-485 terminal block is the same as the control circuit terminal block. Refer to
NOTE
• To avoid malfunction, keep the RS-485 terminal wires away from the control circuit board.
• When the FR-A860-00450 or lower is used with a plug-in option, lead the wires through the hole on the side face of the front
cover for wiring of the RS-485 terminals.
Cut off with
a nipper, etc.
• When the FR-A860-00680 or higher is used with a plug-in option, lead the wires on the left side of the plug-in option for wiring
of the RS-485 terminals.
SDB1 RDA1 RDB1
(TXD1-) (RXD1+) (RXD1-)
- + RXD -
- + RXD -
SDB2 RDA2 RDB2
(TXD2-) (RXD2+) (RXD2-)
(N) Operation via communication and its settings
Name
RDA1
(RXD1+)
RDB1
(RXD1-)
RDA2
(RXD2+)
RDB2
(RXD2-)
SDA1
(TXD1+)
SDB1
(TXD1-)
SDA2
(TXD2+)
SDB2
(TXD2-)
P5S
(VCC)
SG
(GND)
Description
Inverter receive +
Inverter receive -
Inverter receive +
(for branch)
Inverter receive -
(for branch)
Inverter send +
Inverter send -
Inverter send +
(for branch)
Inverter send -
(for branch)
5V
Permissible load current 100 mA
Earthing (grounding)
(connected to terminal SD)
page 49 for the wiring method.
PARAMETERS
5
GROUP
N
543