Toshiba VF-NC3C User manual

INSTRUCTION MANUAL
VF-NC3C
<NOTICE>
1. THIS INSTRUCTION MANUAL IS
SUBJECTED TO BE CHANGED WITHOUT
NOTICE.
2. THIS INSTRUCTION MANUAL IS FOR
STUDY REFERENCES ONLY.

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B-1
2
2. Connection
Warning
Disassembly
prohibited
Never disassemble, modify or repair.
This can result in electric shock, fire and injury. For repairs, call your sales agency.
Prohibited
Don't stick your fingers into openings such as cable wiring hole and cooling fan covers.
This can result in electric shock or other injury.
Don't place or insert any kind of object into the inverter (electrical wire cuttings, rods, wires). This can
result in electric shock or fire.
Do not allow water or any other fluid to come in contact with the inverter.
That may result in electric shock or fire.
Caution
Prohibited
When transporting or carrying, do not hold by the front panel covers.
The covers may come off and the unit will drop out resulting in injury.
2.1 Cautions on wiring
Warning
Prohibited
Never remove the terminal cover when power is on or open door if enclosed in a cabinet.
The unit contains many high voltage parts and contact with them will result in electric shock.
Mandatory
action
Turn power on only after attaching the front cover or closing door if enclosed in a cabinet.
If power is turned on without the terminal cover attached or closing door if enclosed in a cabinet. This
can result in electric shock or other injury.
Electrical construction work must be done by a qualified expert.
Connection of input power by someone who does not have that expert knowledge may result in fire or
electric shock.
Connect output terminals (motor side) correctly.
If the phase sequence is incorrect, the motor will operate in reverse and that may result in injury.
Wiring must be done after installation.
If wiring is done prior to installation that may result in injury or electric shock.
The following steps must be performed before wiring.
(1) Shut off all input power.
(2) Wait at least 15 minutes and check to make sure that the charge lamp is no longer lit.
If these steps are not properly performed, the wiring will cause electric shock.
Tighten the screws on the terminal board to specified torque.
If the screws are not tightened to the specified torque, it may lead to fire.

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B-2
2
2
Warning
Be Grounded
Ground must be connected securely.
If the ground is not securely connected, it could lead to electric shock or fire when a malfunction or
current leak occurs.
Caution
Prohibited
Do not attach devices with built-in capacitors (such as noise filters or surge absorber) to the output
(motor side) terminal.
This could cause a fire.
Preventing radio noise
To prevent electrical interference such as radio noise, separately bundle wires to the main circuit's power
terminals (R/L1, S/L2, T/L3) and wires to the motor terminals (U/T1, V/T2, W/T3).
Control and main power supply
The control power supply and the main circuit power supply for this inverter are the same.
If a malfunction or trip causes the main circuit to be shut off, control power will also be shut off. When
checking the cause of the malfunction or the trip, use the trip holding retention selection parameter.
Wiring
Because the space between the main circuit terminals is small use sleeved pressure terminals for the
connections. Connect the terminals so that adjacent terminals do not touch each other.
For ground terminal use wires of the size that is equivalent to or larger than those given in table 10.1
and always ground the inverter (400V voltage class: C type ground).
Use as large and short a ground wire as possible and wire it as close as possible to the inverter.
For the sizes of electric wires used in the main circuit, refer to the table in section 10.1.
The length of the main circuit wire in table 10.1 should be no longer than 30 meters. If the wire is longer
than 30 meters, the wire size (diameter) must be increased.

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B-3
2
2.2 Standard connections
Warning
Prohibited
Do not connect input power to the output (motor side) terminals (U/T1, V/T2, W/T3).
Connecting input power to the output could destroy the inverter or cause a fire.
First shut off input power and wait at least 15 minutes before touching wires on equipment (MCCB) that
is connected to inverter power side.
Touching the wires before that time could result in electric shock.
Mandatory
action
Set parameter  when VI terminal is used as logic input terminal.
If it is not set, it could result in malfunction.
Be Grounded
Ground must be connected securely.
If the ground is not securely connected, it could lead to electric shock or fire when a malfunction or
current leak occurs.

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B-4
2
2
2.2.1 Standard connection diagram 1
This diagram shows a standard wiring of the main circuit.
MCCB R/L1
S/L2
T/L3
U/T1
V/T2
W/T3
Motor
F
R
S1
S2
CC
P24
OUT
NO
CC
FM CC VI P5
++
-
-
PA/+ PB
Meter Voltage signal: 0-5V/0-10V
(Current signal: 4-20mA)
External potentiometer (1k-10k)
Protective function
activation output
Ry
VF-nC3C
Power
circuit
Forward
Reverse
Preset-speed 1
Preset-speed 2
Common
Standard connection diagram - SINK (Negative) (common:CC)
7.5V-1mA
(or 0-10V/4-20mA)
Low-speed
signal output
*2
*1: VFNC3C-4004P, 4007P models don’t
have the PA/+ and the PB terminals
and cannot be used with Braking
resistor.
*2: When using the OUT output terminal in
sink logic mode, short the NO and CC
terminals.
Control
circuit
I M
Frequency
meter
(ammeter)
Operation panel
FLC
FLB
FLA
*3: When external potentiometer is connected
by using P5 terminal, set the parameter
f 1 0 9 =3.
RS485
communication
connector
*4
*4: When VI terminal is used as a logic
input terminal, refer to page B-10.
Main circuit power supply
3ph-400V class: three-phase 380-460V
-50/60Hz
*3
Braking resistor（Option）*1

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B-5
2
2.2.2 Standard connection diagram 2
MCCB R/L1
S/L2
T/L3
U/T1
V/T2
W/T3
Motor
F
R
S1
S2
OUT
NO
CC
++
-
-
Meter
External potentiometer (1k-10k)
Control
circuit
Protective function
activation output VF-nC3C
Power
circuit
Forward
Reverse
Preset-speed 1
Preset-speed 2
Standard connection diagram - SOURCE (Positive) (common:P24)
7.5V-1mA
(or 0-10V/4-20mA)
FM CC VI P5
Voltage signal: 0-5V/0-10V
(Current signal: 4-20mA)
Low-Speed
signal output
*2
Ry
*2: When using the NO output terminal in
source logic mode, short the P24 and
OUT terminals.
I M
Frequency
meter
(ammeter)
RS485
communication
connector
Operation panel
FLC
FLB
FLA
*3: When external potentiometer is connected
by using P5 terminal, set the parameter
f 1 0 9 =3.
*4
*3
Main circuit power supply
3ph-400V class: three-phase 380-460V
-50/60Hz
*4: When VI terminal is used as a contact
input terminal, refer to page B-10.
P24 Common
*1: VFNC3C-4004P, 4007P models don’t
have the PA/+ and the PB terminals
and cannot be used with Braking
resistor.
PA/+ PB
Braking resistor（Option）*1

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B-6
2
2
2.3 Description of terminals
2.3.1 Power circuit terminals
This diagram shows an example of wiring of the main circuit. Use options if necessary.
Power supply and motor connections
Connections with peripheral equipment
Motor
Power
supply
Inverter
Braking resistor
No-fuse
braker
R/L1
S/L2
T/L3
PA/+
PB
V/T2
U/T1
W/T3
IM
Magnetic
contactor
Input AC
reactor
Zero-phase
reactor
Note 1: The PA/+ and PB terminals are not provided for VFNC3C-4004P, 4007P models.
Power supply
S/L2
T/L3
Motor
No-fuse
breaker
Connect the power
cables to R/L1, S/L2,
and T/L3.
Connect the motor
cables to U/T1, V/T2
and W/T3.
VF-nC3C
E
U/T1
V/T2
W/T3
R/L1

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B-7
2
Power circuit
Terminal symbol
Terminal function
Grounding terminal for connecting inverter. There are 3 terminals in total.
R/L1,S/L2,T/L3
400V class: three-phase 380 to 460V-50/60Hz
U/T1,V/T2,W/T3
Connect to a (three-phase induction) motor.
PA/+,PB
Connect to braking resistors.
Change parameters ,,, if necessary.
The arrangements of power circuit terminals are different from each range.
Refer to section 1.3.3.1) for details.
2.3.2 Control circuit terminals
The control circuit terminal board is common to all equipment.
Regarding to the function and specification of each terminal, please refer to the following table.
Refer to section 1.3.3.3) about the arrangement of control circuit terminals.
Control circuit terminals
Terminal
symbol
Input /
output
Function
Electrical
specifications
Inverter internal circuits
F
Input
Multifunction programmable logic input
Shorting across F-CC causes
forward rotation; open causes slow-
down and stop. (When Standby ST
is always ON)
3 different functions can be
assigned.
No voltage
logic input
24Vdc-5mAor less
*Sink/Source
selectable using
parameter 
(In case of sink
logic is the left)
2.2k
+24V
ON:
Sink
OFF:
Source
2.2k
470
F
R
S1
S2
CC
OFF:
External
24V
P24
R
Input
Shorting across R-CC causes
reverse rotation; open causes slow-
down and stop. (When Standby ST
is always ON)
3 different functions can be
assigned.
S1
Input
Shorting across S1-CC causes
preset speed operation.
2 different functions can be
assigned.
S2
Input
Shorting across S2-CC causes
preset speed operation.
2 different functions can be
assigned.

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B-8
2
2
Terminal
symbol
Input /
output
Function
Electrical
specifications
Inverter internal circuits
CC
Common
to Input /
output
Control circuit's equipotential terminal (2
terminals)
CC
P5
Output
Analog power supply output
5Vdc
(permissible load
current: 10mA)
100
+5V
P5
CC
V I
Input
Multifunction programmable analog input.
Factory default setting: 0-10Vdc (1/1000
resolution) and 0-60Hz (0-50Hz)
frequency input.
The function can be changed to 0-20mAdc
(4-20mA) current input by parameter 
=1 setting.
0-5Vdc (1/1000 resolution) voltage input
by parameter  =3 setting.
Switch to this setting when external
potentiometer is connected by using P5
terminal.
By changing parameter f109=2 setting,
this terminal can also be used as a
multifunction programmable logic input
terminal. When using the sink logic, be
sure to insert a resistor between P24-VIA
(4.7 k-1/2 W).
5V/10Vdc
(internal impedance:
40k)
4-20mA
(internal
impedance: 250)
Note 1)
1.6k
+5V
250
39.2k
47k
47k
ON:Current
OFF:Voltage
ON:10V
OFF:5V
VI
CC
FM
Output
Multifunction programmable analog
output. Standard default setting: output
frequency.
The function can be changed to 0-10Vdc
voltage or 0-20mAdc (4-20mA) current
output by parameter  setting.
1mAdc full-scale
ammeter
0-10V DC volt
meter
0-20mA(4-20mA)
DC ammeter
Permissible load
resistance:
750Ω or less
0-10V DC volt
meter
2.7k
+24V
68
121
ON:Current
+
–
ON:Voltage
Meter
ON:Meter
+
–
FM
CC
Note 1) Be careful, if 4-20mA is selected, when the inverter's power is ON, the internal impedance is 250Ω, but when the power
is OFF, the internal impedance increases very much to approximately 40kΩ.

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B-9
2
+24V
Over current
protection circuit
P24
CC
OFF:f 1 2 7 =200
Terminal
symbol
Input /
output
Function
Electrical
specifications
Inverter internal circuits
P24
Output
24Vdc power output
24Vdc-100mA
Input
This terminal can be used as an external
24Vdc input for logic input terminal by
changing parameter f127=200.
-
OUT
NO
Output
Multifunction programmable open
collector output. Standard default settings
detect and output low speed signal.
Multifunction output terminals to which
two different functions can be assigned.
The NO terminal is an isoelectric output
terminal. It is insulated from the CC
terminal.
By changing parameter settings, these
terminals can also be used as
multifunction programmable pulse train
output terminals.
Open collector output
24Vdc-100mA
To output pulse
trains,
a current of 10mA
or more needs to
be passed.
Pulse frequency
range:
38～1600pps
OUT
NO
10
FLA
FLB
FLC
Note 2)
Output
Multifunction programmable relaycontact
output.
Detects the operation of the inverter's
protectionfunction.
Contact across FLA-FLC isclosed and FLB-
FLC is opened during protection function
operation.
250Vac-2A
(cos=1)
: at resistance
load
30Vdc-1A
250Vac-1A
(cos=0.4)
Min.permissible
load
5Vdc-100mA
FLA
FLC
FLB
RY
+24V
Note 2) Please use the OUT terminal as much as possible when the programmable controller is connected.