Wiring For Control Circuit Terminals - Fuji Electric FRENIC-HVAC User Manual

5.1.7

Wiring for control circuit terminals

In general, the covers of the control signal wires are not specifically designed to withstand a high voltage (i.e.,
reinforced insulation is not applied). Therefore, if a control signal wire comes into direct contact with a live
conductor of the main circuit, the insulation of the cover might break down, which would expose the signal wire
to a high voltage of the main circuit. Make sure that the control signal wires will not come into contact with live
conductors of the main circuit.
Failure to observe these precautions could cause electric shock or an accident.
Noise may be emitted from the inverter, motor and wires.
Take appropriate measures to prevent the nearby sensors and devices from malfunctioning due to such noise.
An accident could occur.
Table 5.2 lists the symbols, names and functions of the control circuit terminals. The wiring to the
control circuit terminals differs depending upon the setting of the function codes, which reflects the
use of the inverter. Route wires properly to reduce the influence of noise.
Table 5.2 Symbols, Names and Functions of the Control Circuit Terminals
Symbol
[13]
[12]
[C1]
[V2]
[11]
[X1]
[X2]
[X3]
[X4]
[X5]
[X6]
[X7]
[FWD]
[REV]
Name
Power supply for Power supply (+10 VDC) for frequency command potentiometer
the potentiometer (Potentiometer: 1 to 5kΩ)
Analog setting The frequency is commanded according to the external analog voltage
voltage input input.
Analog setting The frequency is commanded according to the external analog current
current input input.
PTC thermistor
Connects PTC (Positive Temperature Coefficient) thermistor for motor
input
protection.
Analog setting The frequency is commanded according to the external analog voltage
voltage input input.
Analog common Common for analog input/output signals
(1) Various signals such as "Coast to a stop," "Enable external alarm
Digital input 1
trip," and "Select multi-frequency" can be assigned to terminals [X1]
Digital input 2
to [X7], [FWD] and [REV] by setting function codes E01 to E07,
E98, and E99.
Digital input 3
(2) Input mode, i.e. SINK/SOURCE, is changeable by using the slide
switch SW1.
Digital input 4
(3) The logic value (1/0) for ON/OFF of the terminals [X1] to [X7],
Digital input 5
[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
Digital input 6
"1" in the negative logic system and vice versa.
Digital input 7
Run forward Short-circuiting terminals [FWD] and [CM] runs the motor in the forward
command direction and opening them decelerates the motor to a stop.
Run reverse Short-circuiting terminals [REV] and [CM] runs the motor in the reverse
command direction and opening them decelerates the motor to a stop.
Functions
5-16