Fuji Electric FRENIC-MEGA, Инструкция по эксплуатации

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2-19
Ch
ap. 2
M
O
UNTING
A
N
D WIRING
T
H
E IN
V
E
R
T
ER
Table 2.7 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 2.7 Symbols, Names and Functions of the Control Circuit Terminals
Cl
as
si
fi-
cation
Symbol Name Functions
Analog inpu
t
[13] Power supply
for the
potentiometer
Power supply (+10 VDC) for an external frequency command potentiometer
(Variable resistor: 1 to 5k
Ω
)
The potentiometer of 1/2 W rating or more should be connected.
[12] Analog setting
voltage input (1) The frequency is commanded according to the external voltage input.
• 0 to
±
10 VDC/0 to
±
100% (Normal operation)
• +10 to 0 VDC/0 to 100% (Inverse operation)
(2) In addition to frequency setting, PID command, PID feedback signal, auxiliary
frequency command setting, ratio setting, torque limiter level setting, or analog input
monitor can be assigned to this terminal.
(3) Hardware specifications
• Input impedance: 22k
Ω
• The maximum input is
±
15 VDC, however, the voltage higher than
±
10 VDC is
handled as
±
10 VDC.
• Inputting a bipolar analog voltage (0 to
±
10 VDC) to terminal [12] requires setting
function code C35 to "0."
[C1] Analog setting
current input (1) The frequency is commanded according to the external current input.
• 4 to 20 mA DC/0 to 100% (Normal operation)
• 20 to 4 mA DC/0 to 100 % (Inverse operation)
(2) In addition to frequency setting, PID command, PID feedback signal, auxiliary
frequency command setting, ratio setting, torque limiter level setting, or analog input
monitor can be assigned to this terminal.
(3) Hardware specifications
• Input impedance: 250
Ω
• The maximum input is +30 mA DC, however, the current larger than +20 mA DC is
handled as +20 mA DC.
PTC/NTC
thermistor
input (1) Connects PTC (Positive Temperature
Coefficient)/NTC (Negative Temperature
Coefficient) thermistor for motor
protection. Ensure that the slide switch
SW5 on the control PCB is turned to the
PTC/NTC position (see Section 2.3.6
"Setting up the slide switches").
The figure shown at the right illustrates
the internal circuit diagram where SW5
(switching the input of terminal [C1]
between C1 and PTC/NTC) is turned to
the PTC/NTC position. For details on
SW5, refer to Section 2.3.6 "Setting up
the slide switches." In this case, you must
change data of the function code H26.
Figure 2.10 Internal Circuit Diagram
(SW5 Selecting PTC/NTC)
[V2] Analog setting
voltage input (1) The frequency is commanded according to the external voltage input.
• 0 to
±
10 VDC/0 to
±
100 % (Normal operation)
• +10 to 0 VDC/0 to 100% (Inverse operation)
(2) In addition to frequency setting, PID command, PID feedback signal, auxiliary
frequency command setting, ratio setting, torque limiter level setting, or analog input
monitor can be assigned to this terminal.
(3) Hardware specifications
• Input impedance: 22k
Ω
• The maximum input is
±
15 VDC, however, the voltage higher than
±
10 VDC is
handled as
±
10 VDC.
• Inputting a bipolar analog voltage (0 to
±
10 VDC) to terminal [V2] requires setting
function code C45 to "0."
[11] Analog
common Common for analog input/output signals ([13], [12], [C1], [V2], [FM1] and [FM2]).
Isolated from terminals [CM] and [CMY].