Mitsubishi Electric FR-A720-0.4K Instruction Manual page 49

Connection of stand-alone option units
(2) Connection with the MT-HC (75K or higher)
After making sure the wiring is correct, set the following parameters.
Pr. 19 Base frequency voltage (under V/F control) or Pr. 83 Rated motor voltage (under a control method other than V/F
control) = "rated motor voltage"
Pr. 30 Regenerative function selection = "2"
MCCB
Three-phase
AC power
supply
*1 Remove the jumper across terminals R/L1 and R1/L11, S/L2 and 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 147.)
*2 Do not insert the MCCB between terminals P/+ and N/- (P and P/+, N and 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
117.) 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.
*4 Connect the power supply to terminals R1 and S1 of the MT-HC via an insulated transformer.
*5 Always connect the terminal RDY (of MT-HC) to a terminal where the X10 or MRS signal is assigned in the inverter. Always
connect the terminal SE (of MT-HC) to the terminal SD (of the inverter). Not doing so may damage MT-HC.
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.
42
MT-HCL01
MC
R R2
R2
S S2
T T2
R1
MT-HCB MT-HCL02
R3 R3 R4
S2 S3 S3 S4
T2 T3 T3 T4
88R
88S
S1
MT-HC Inverter
R4 R/L1
S4 S/L2
T4 T/L3
88R P P/+
88S N N/
*5
RDY
X10
R
RSO RES
S
SE
SD
T
R1/
R1 S1 L11
MT-HCTR
*4
Insulated transformer
Motor
U
IM
*1 V
W
*2
*3
*1
S1/
L21