Fuji Electric FRENIC-HVAC Manual page 95

Wiring notes
To make the machinery or equipment compliant with the EMC standards, wire the motor and inverter in
accordance with the following.
(*1) Use shielded wires for the motor cable and route the cable as short as possible. Firmly clamp the shield to the
specified point inside the inverter.
(*2) When wiring the main circuit power input lines of the inverters of 200V class series inverter of 5.5 to 45kW (7 to 60
HP) and 400V ones of 11 to 90 kW (15 to 125 HP), be sure to pass them through a ferrite core.
When shielded wires are not used for the motor cable, remove the motor cable clamps to prevent the
cable covering from getting damaged, which makes the machinery or equipment incompliant with the
EMC standards. Wiring the inverter main power input lines without passing them through a ferrite
core also makes the machinery or equipment incompliant with the EMC standards due to increase of
noise generated by the inverter, but it does not affect inverter basic operation.
For details about wiring, refer to Chapter 8, Section 8.3 "Compliance with EMC Standards."
Control circuit terminals
Table 2.5 Names, Symbols and Functions of the Control Circuit Terminals
Classifi-
Name
cation
Power supply for the
potentiometer
Analog setting voltage input
Analog setting current input
Analog
PTC thermistor input
input
Analog setting voltage input
Analog common
Digital input 1 to
Digital input 7
Run forward command
Digital
input
Run reverse command
Enable input 1
Enable input 2
PLC signal power
Digital input common
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Symbol
[13] Power supply for an external frequency command potentiometer
(Variable resistor: 1 to 5kΩ)
[12] External voltage input that commands the frequency externally.
[C1] External current input that commands the frequency externally.
Connection of a PTC (Positive Temperature Coefficient) thermistor
for motor protection.
[V2] External voltage input that commands the frequency externally.
[11] Common terminal for analog input signals.
[X1] (1) Various signals such as "Coast to a stop," "Enable external
to alarm trip," and "Select multi-frequency" can be assigned to
[X7] terminals [X1] to [X7], [FWD] and [REV] by setting function
codes E01 to E07, E98, and E99.
(2) Input mode, i.e. SINK and SOURCE, is changeable by using
the slide switch SW1.
(3) The logic value (1/0) for ON/OFF of the terminals [X1] to [X7],
[FWD], or [REV] can be switched. If the logic value for ON of
the terminal [X1] is "1" in the normal logic system, for example,
OFF is "1" in the negative logic system and vice versa.
[FWD] Short-circuiting terminals [FWD] and [CM] runs the motor in the
forward direction and opening them decelerates the motor to a
stop.
[REV] Short-circuiting terminals [REV] and [CM] runs the motor in the
reverse direction and opening them decelerates the motor to a
stop.
[EN1] (1) Opening the circuit between terminals [EN1] and [PLC] or
[EN2] terminals [EN2] and [PLC] stops the operation of the inverter
output transistor.
(2) The input mode of terminals [EN1] and [EN2] is fixed at the
SOURCE mode. No switching to the SINK mode is possible.
(3) If either one of [EN1] and [EN2] is OFF, an alarm occurs.
[PLC] Connects to the output signal power supply of Programmable Logic
Controller (PLC).
[CM] Common terminals for digital input signals
2-11
Functions