(2) Connection with the MT-HC (75K or higher)
Remove the jumper across terminals R and R1, S and S1 of the inverter, and connect the control circuit
power supply to the R1 and S1 terminals. Do not connect anything to the power input terminals R/L1, S/
L2, and T/L3. Incorrect connection will damage the inverter. (E.OPT (option fault) will occur. (Refer to page
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.
Use Pr. 178 to Pr. 189 (input terminal function selection) to assign the terminals used for the X10 (X11) signal.
(Refer to Chapter 4 of the Instruction Manual (Applied).) 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 Chapter 4 of the Instruction Manual
Connect the power supply to terminals R1 and S1 of the MT-HC via an isolated transformer.
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.
⋅ The voltage phases of terminals R/L1, S/L2, T/L3 and terminals R4, S4, T4 must be matched.
⋅ Use sink logic (initial setting) when the MT-HC is connected. The MT-HC cannot be connected when source logic is
⋅ When connecting the inverter to the MT-HC, do not connect the DC reactor provided to the inverter.
♦ Parameters referred to ♦
Pr.30 Regenerative function selection
Refer to Chapter 4 of the Instruction Manual (Applied)
Connection of stand-alone option units