2-11
*1 Install a recommended molded case circuit breaker (MCCB) or residual-current-operated protective device (RCD)/earth leakage circuit
breaker (ELCB) (with overcurrent protection function) in the primary circuit of the inverter to protect wiring. Ensure that the circuit
breaker capacity is equivalent to or lower than the recommended capacity.
*2 Install a magnetic contactor (MC) for each inverter to separate the inverter from the power supply, apart from the MCCB or RCD/ELCB,
when necessary.
Connect a surge absorber in parallel when installing a coil such as the MC or solenoid near the inverter.
*3 The R0 and T0 terminals are provided for inverters with a capacity of 1.5 kW or above.
To retain an alarm output signal ALM issued on inverter's programmable output terminals by the protective function or to keep the
keypad alive even if the main power has shut down, connect these terminals to the power supply lines. Without power supply to these
terminals, the inverter can run.
*4 Normally no need to be connected. Use these terminals when the inverter is equipped with a high power-factor, regenerative PWM
converter (RHC series).
*5 When connecting an optional DC reactor (DCR), remove the jumper bar from the terminals P1 and P(+).
Inverters with a capacity of 55 kW in LD mode and inverters with 75 kW or above require a DCR to be connected. Be sure to connect it
to those inverters.
Use a DCR when the capacity of the power supply transformer exceeds 500 kVA and is 10 times or more the inverter rated capacity, or
when there are thyristor-driven loads in the same power supply line.
*6 Inverters with a capacity of 7.5 kW or below have a built-in braking resistor (DBR) between the terminals P(+) and DB.
When connecting an external braking resistor (DBR), be sure to disconnect the built-in one.
*7 A grounding terminal for a motor. Use this terminal if needed.
*8 For control signal wires, use twisted or shielded-twisted wires. When using shielded-twisted wires, connect the shield of them to the
common terminals of the control circuit. To prevent malfunction due to noise, keep the control circuit wiring away from the main circuit
wiring as far as possible (recommended: 10 cm or more). Never install them in the same wire duct. When crossing the control circuit
wiring with the main circuit wiring, set them at right angles.
*9 The connection diagram shows factory default functions assigned to digital input terminals [X1] to [X7], [FWD] and [REV], transistor
output terminals [Y1] to [Y4], and relay contact output terminals [Y5A/C] and [30A/B/C].
*10 Switching connectors in the main circuits. For details, refer to "
Switching connectors" later in this section.
*11 Slide switches on the control printed circuit board (control PCB). Use these switches to customize the inverter operations. For details,
refer to Section 2.3.6 "Setting up the slide switches."
*12 When using the Enable input function, be sure to remove the jumper wire from terminals [EN] and [PLC]. For opening and closing the
hardware circuit between terminals [EN] and [PLC], use safety components such as safety relays and safety switches that comply with
EN954-1, Category 3 or higher.
Be sure to use shielded wires exclusive to terminals [EN] and [PLC]. (Do not put them together with
any other control signal wire in the same shielded core.) Ground the shielding layer. For details, refer to Chapter 9, Section 9.6
"Compliance with EN954-1, Category 3."
When not using the Enable input function, keep the terminals between [EN] and [PLC] short-circuited with the jumper wire (factory
default).
To Next Page
Loading...
