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Connection of stand-alone option units
(2) Connection with the MT-HC (75K or more)
*1
Remove the jumper across terminals R-R1, S-S1 of the inverter, and connect the control circuit power
supply to the R1 and S1 terminals. The power input terminals R/L1, S/L2, T/L3 must be open. Incorrect
connection will damage the inverter. (E.OPT (option fault) will occur. (
Refer to page 268.
)
*2
Do not insert the MCCB between terminals P/+
−
N/- (P/+
−
P/+, N/-
−
N/-). Opposite polarity of terminals
N, P will damage the inverter.
*3
Use
Pr. 178
to
Pr. 189
(input terminal function selection)
to assign the terminals used for the X10 (X11) signal.
(
Refer to page 115.)
For communication where the start command is sent only once, e.g. RS-485
communication operation, use the X11 signal when making setting to hold the mode at occurrence of an
instantaneous power failure.
(
Refer to page 107.)
*4
Connect the power supply to terminals R1 and S1 of the MT-HC via an isolated transformer.
*5
Be sure to connect terminal RDY of the MT-HC to the X10 signal or MRS signal assigned terminal of the
inverter, and connect terminal SE of the MT-HC to terminal SD of the inverter. Without proper connecting,
MT-HC will be damaged.
CAUTION
⋅
Use sink logic (initial setting) when the MT-HC is connected. The MT-HC cannot be connected when source logic is
selected.
⋅
The voltage phases of terminals R/L1, S/L2, T/L3 and terminals R4, S4, T4 must be matched.
⋅
When connecting the inverter to the MT-HC, do not connect the DC reactor provided to the inverter.
Three-phase
AC power
supply
MCCB
MT-HCL01
MT-HCB
R1
S1
R1 S1
R1/
L11
S1/
L21
MT-HCL02
MT-HC
Inverter
MT-HCTR
Isolated transformer
R
S
T
R/L1
S/L2
T/L3
U
V
W
R2
S2
T2
R2
S2
T2
R3
S3
T3
R3
S3
T3
R4
S4
T4
R4
S4
T4
R
S
T
88R
88S
88R
88S
*2
RDY
RSO
SE
X10
RES
SD
*3
*5
*1
*1
*4
Motor
IM
P
N
P/+
N/
MC