Mitsubishi Electric FR-A720-0.4K Instruction Manual page 60

Connection of stand-alone option units
(2) Connection with the MT-HC (75K or more)
MCCB
Three-phase
AC power
supply
*1 Remove the jumper across terminals R/L1 - R1/L11, S/L2 - S1/L21 of the inverter, and connect the control circuit power
supply to the R1/L11 and S1/L21 terminals. The power input terminals R/L1, S/L2, T/L3 must be open. Incorrect connection
will damage the inverter. (E.OPT (option alarm) will occur. (Refer to page 396.)
Do not insert the MCCB between terminals P/+ − N/- (P − P/+, N − N/-). Opposite polarity of terminals N, P will damage the
*2
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
222.) 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 199.)
*4 Connect the power supply to terminals R1 and S1 of the MT-HC via an insulated transformer.
CAUTION
⋅ The voltage phases of terminals R/L1, S/L2, T/L3 and terminals R4, S4, T4 must be matched.
⋅ Use sink logic (factory setting) when the MT-HC is connected. The MT-HC cannot be connected when source logic is selected.
⋅ When connecting the inverter to the MT-HC, do not connect the DC reactor provided to the inverter.
50
MT-HCL01 MT-HCB
R R2
R2 R3
S S2
S2 S3
T T2
T2 T3
88R
88S
R1 S1
MT-HCL02 MT-HC
R3 R4 R4
S3 S4 S4
T3 T4 T4
88R
88S
RDY
R
RSO
S
SE
T
R1 S1
MT-HCTR
Insulated transformer
Inverter
Motor
R/L1 U
S/L2 *1 V
T/L3 W
P P/+
*2
N N/
X10
*3
RES
SD
*1
R1/ S1/
L11 L21
*4
IM