Terminal connection diagrams
34
Wiring converter units and inverters
Main circuit terminals
• Wire the converter unit to the inverter at each terminal P and terminal N. Pair the masters or the slaves (1 with 1 or
2.with 2). Otherwise, incorrect connection may damage the converter unit and the inverter.
• Use cables of 50 m or shorter each to connect the converter unit and the inverter (for terminal P or N).
• For information about the gauge of cable for terminal P or N, refer to
Do not install an MCCB for terminal P or N. Ensure correct connection in polarity of terminals P and N; which may damage the inverter.
Control circuit terminals
• The control circuit terminals of the master inverter and master converter unit must be wired. Ensure that the terminals
are wired correctly so that the commands output from the converter unit are properly transmitted to the inverter.
Otherwise, the converter unit and the inverter may be damaged.
• Use cables of 30 m or shorter each to wire the control circuits.
For the terminal used for the X10 signal input, set "10" in any of
Pr.178 to Pr.189 (Input terminal function selection)
to assign the function.
To use the RDA signal of the converter unit, select the NC contact input specification for the input logic of the MRS signal or X10 signal of the
inverter.
To use the RDB signal of the converter unit, select the NO contact input specification for the input logic of the MRS signal or X10 signal of the
inverter.
(For changing the input logic, refer to the Instruction Manual of the inverter.)
For the terminal used for the X11 signal input, set "11" in any of
Pr.178 to Pr.189 (Input terminal function selection)
to assign the function.
For RS-485 or other communication operation where the start command is only transmitted once, use the X11 signal to keep the operation mode
before an instantaneous power failure.
Always connect terminal RDA of the converter unit and terminal MRS (X10) of the inverter, and terminal SE of the converter unit and terminal SD
(sink logic) of the inverter. Otherwise, the converter unit may be damaged.
R1/L11
S1/L21
R/L1
S/L2
T/L3
Power
supply
U
V
W
R1/L11
S1/L21
P/+
P/+
N/-
N/-
∗1
Inverter
Converter unit
To motor
X11
RES
SD
IPF
RSO
SE
MRS(X10)
RDA
∗4
∗4
∗3
∗1
,
∗2
RDB
Inverter
Converter unit
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