Fuji Electric FRENIC-HVAC User Manual page 102

*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 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. Even without power supply to these terminals, the inverter can run.
*4 A grounding terminal for a motor. Use this terminal if needed.
*5 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.
*6 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].
*7 Terminals [Y1] to [Y4] (transistor outputs) support both SINK and SOURCE modes. The diagrams below
show the examples of circuit connection between the transistor output of the inverter's control circuit and a
PLC.
<Control circuit>
Photocoupler
Current
31 to
35 V
(a) PLC serving as SINK
*8 Slide switches on the control printed circuit board (control PCB). Use these switches to customize the
inverter operations. For details, refer to Section 2.3.2 "Setting up the slide switches."
*9 When the Enable function is not to be used, short-circuit terminals [EN1] and [PLC] and terminals [EN2]
and [PLC] 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. Be
sure to use shielded wires exclusive to terminals [EN1] and [PLC] and terminals [EN2] and [PLC]. (Do not
put them together with any other control signal wire in the same shielded core.)
*10 (Missing number for FRN075AR1S-2U or above and FRN150AR1S-4U or above.)
Usually there is no need to do anything for the EMC filter.
When the leakage current from the connected EMC filter causes problems with the power supply system,
removing screws from terminals [E1] and [E2] could improve the problem. Note that doing so loses the
effect of the EMC filter so that the inverter is no longer compliant with the EMC standards. To remove
those screws, consult your Fuji Electric representative.
*11 Usually there is no need to do anything for these terminals. To be used when the inverter is combined with
a power regenerative PWM converter (RHC series).
*12 Main circuit switching connectors. For details, refer to Chapter 5, Section 5.1.6 "5.1.6 Wiring of main
circuit terminals and grounding terminals."
Programmable
logic controller
[Y1]
SINK input
to
[Y4]
[CMY]
C0
2-69
2.9 External Dimensions
<Control circuit>
Photocoupler
Current
[Y1]
to
[Y4]
31 to
35 V
[CMY]
(b) PLC serving as SOURCE
Programmable
logic controller
C0
SOURCE input