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(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 2HP 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(+).
EQ7-2100-C / EQ7-4100-C and larger HP models require a DCR (packed with the EQ7) to be connected.
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 EQ7-2015-C/EQ7-4015-C and smaller HP models 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/3.9 inches
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 "Instruction manual section 2.3.4 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 of the instruction manual "Setting up the slide switches."
*12 When the Enable input function is not to be used, keep terminals [EN1]-[PLC] and terminals [EN2]-[PLC]
short-circuited using jumper wires. For opening and closing the hardware circuit between terminals [EN1] and
[PLC] and between [EN2] and [PLC], use safety components such as safety relays and safety switches that
comply with EN954-1 or EN ISO13849-1 Category 3 or higher.
*13 To bring the inverter into compliance with the European Standard, Low Voltage Directive EN61800-5-1, be
sure to insert the specified fuse in the primary circuit of the inverter.