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WIRING
2.3.2 Connection and wiring length between the converter unit and the inverter
Perform wiring so that the commands sent from the converter unit are transmitted to the inverter without fail. Incorrect
connection may damage the converter unit and the inverter.
For the wiring length, refer to the table below.
Across the terminals P and P and the terminals N and N
For the cable gauge of the cable across the main circuit terminals P/+ and N/– (P and P, N and N), refer to page 11.
MCCB
Power supply
*1
Do not install an MCCB across the terminals P/+ and N/- (across terminals P and P/+ or across N and N/-). Connecting the opposite
polarity of terminals N/- and P/+ will damage the inverter.
*2
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.
*3
To use RDA signal of the converter unit, select the NC contact input specification for the input logic of MRS signal or X10 signal of the
inverter.
To use RDB signal of the converter unit, select the NO contact input specification for the input logic of MRS signal or X10 signal of the
inverter.
(For changing the input logic, refer to the Instruction Manual of the inverter.)
*4
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 any other communication where the start command is only transmitted once, use the X11 signal to save the
operation mode at the time of an instantaneous power failure.
*5
Always connect the terminal RDA of the converter unit and the terminal MRS (X10) of the inverter, and the terminal SE of the
converter unit and the terminal PC (source logic) of the inverter. Not connecting these terminals may damage the converter unit.
2.3.3 Cable size of the control circuit power supply (terminal R1/L11, S1/L21)
Terminal screw size: M4
2
Cable size: 0.75 mm
to 2 mm
Tightening torque: 1.5 Nm
12
≤ 50 m
Converter unit
FR-CC2
MC
R/L1
S/L2
T/L3
R1/L11
S1/L21
2
Wiring Length
*1
P/+
P/+
N/-
N/-
R1/L11
S1/L21
*5
RDA
MRS(X10)
*2, *3
RDB
IPF
X11
RES
RSO
*5
PC
SE
Other signal cables
≤ 30 m
Inverter
U
V
M
W
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