Wiring. Omron VS MINI J7
Tangazo
Tangazo
!
Caution
!
Caution
!
Caution
!
Caution
!
Caution
!
Caution
Wiring
2-2 Wiring
!
WARNING
!
WARNING
!
WARNING
!
WARNING
Chapter 2-2
Wiring must be performed only after confirming that the power supply has been turned OFF. Not doing so may result in electrical shock.
Wiring must be performed by authorized personnel. Not doing so may result in electrical shock or fire.
Be sure to confirm operation only after wiring the emergency stop circuit. Not doing so may result in injury.
Always connect the ground terminals to a ground of 100 Ω or less for the
200V AC class, or 10 Ω or less for the 400V AC class. Not connecting to a proper ground may result in electrical shock.
Install external breakers and take other safety measures against shortcircuiting in external wiring. Not doing so may result in fire.
Confirm that the rated input voltage of the Inverter is the same as the AC power supply voltage. An incorrect power supply may result in fire, injury, or malfunction.
Connect the Braking Resistor and Braking Resistor Unit as specified in the manual. Not doing so may result in fire.
Be sure to wire correctly and securely. Not doing so may result in injury or damage to the product.
Be sure to firmly tighten the screws on the terminal block. Not doing so may result in fire, injury, or damage to the product.
Do not connect an AC power to the U, V, or W output. Doing so may result in damage to the product or malfunction.
10
Wiring
Chapter 2-2
2-2-1 Removing and Mounting the Covers
It is necessary to remove the front cover, optional cover, top protection cover, and thebottom protection cover from the Inverter to wire the terminal block.
Follow the instructions below to remove the covers from the Inverter. To mount the covers, take the opposite steps.
Removing the Front Cover
• Loosen the front cover mounting screws with a screwdriver.
• Press the left and right sides of the front cover in the arrow 1 directions and lift the bottom of the cover in the arrow 2 direction to remove the front cover as shown in the following illustration.
1 2
Removing the Top and Bottom Protection Covers and Optional Cover
Removing the Top and Bottom Protection Covers
• After removing the front cover, pull the top and bottom protection covers in the arrow 1 directions.
Removing the Optional Cover
• After removing the front cover, lift the optional cover in the arrow 2 direction based on position A as a fulcrum.
1
Positon A
1
2
11
Wiring
Chapter 2-2
2-2-2 Terminal Block
Before wiring the terminal block, be sure to remove the front cover, top protection cover, and the bottom protection cover.
Position of Terminal Block
Ground terminal
Main circuit input terminals
Control circuit terminals
Main circuit output terminals
Arrangement of Control Circuit Terminals
Ground terminal
Arrangement of Main Circuit Terminals
• CIMR-J7AZ20P1 to CIMR-J7AZ20P7
CIMR-J7AZB0P1 to CIMR-J7AZB0P4
• CIMR-J7AZ21P5 to CIMR-J7AZ24P0
CIMR-J7AZB0P7 to CIMR-J7AZB4P0
CIMR-J7AZ40P2 to CIMR-J7AZ44P0
Main Circuit Input Terminals
(Upper Side)
Main Circuit Input Terminals
(Upper Side)
Main Circuit Output Terminals
(Lower Side)
Main Circuit Output Terminals
(Lower Side)
12
Wiring
Chapter 2-2
Main Circuit Terminals
Symbol
R/L1
Name
Power Supply input terminals
S/L2
T/L3
U/T1
V/T2
W/T3
+1
+2
–
Description
CIMR-J7AZ2 _ : 3-phase 200 to 230 V AC
CIMR-J7AZB _ : Single-phase 200 to 240 V AC
CIMR-J7AZ4 _ : 3-phase 380 to 460 V AC
Note Connect single-phase input to terminals R/L1 and S/L2.
Motor output terminals
Connection terminals +1 and +2:
DC reactor connection terminals
+1 and –:
DC power supply input terminals
Ground terminal
3-phase power supply output for driving motors.
CIMR-J7AZ2 _ : 3-phase 200 to 230 V AC
CIMR-J7AZB _ : 3-phase 200 to 240 V AC
CIMR-J7AZ4 _ : 3-phase 380 to 460 V AC
Connect the DC reactor for suppressing harmonics to terminals
+1 and +2.
When driving the Inverter with DC power, input the DC power to terminals +1 and –.
(Terminal +1 is a positive terminal.)
Be sure to ground the terminal under the following conditions.
CIMR-J7AZ2 _ : Ground at a resistance of 100 Ω or less.
CIMR-J7AZB _ : Ground at a resistance of 100 Ω or less.
CIMR-J7AZ4 _ : Ground at a resistance of 10 Ω or less, and connect to the power supply’s neutral phase to conform to EC Directives.
Note Be sure to connect the ground terminal directly to the motor frame ground.
Note The maximum output voltage corresponds to the power supply input voltage of the Inverter.
13
Wiring
Chapter 2-2
Control Circuit Terminals
Symbol
Input S1
S2
S3
S4
S5
Name
Forward/Stop
Multi-function input 1 (S2)
Multi-function input 2 (S3)
Multi-function input 3 (S4)
Multi-function input 4 (S5)
SC Sequence input common
Function
Forward at ON. Stops at OFF.
Set by parameter n36
(Reverse/Stop)
Set by parameter n37
(Fault reset)
Set by parameter n38
(External fault:Normally open)
Set by paramter n39
(Multi-step reference 1)
Common for S1 through S5
Signal level
Photocoupler
8 mA at 24 V DC
Note NPN is the default setting for theses terminals. Wire them by providing a common ground. No external power supply is required. To provide an external power supply and wire the terminals through a common positive line, however, set the SW7 to PNP and make sure that the power supply is at 24 V DC ±10%.
20 mA at 12 V DC FS
FR
Frequency reference power supply
Frequency reference input
Output
FC
MA
Frequency reference common Common for frequency reference use
Multi-function contact output
(Normally open)
MB Multi-function contact output
(Normally closed)
MC Multi-function contact output common
Set by parameter n40
(during running)
Common for MA and MB use
AM Analog monitor output
AC Analog monitor output common
DC power supply for frequency reference use
Input terminal for frequency reference use
Set by parameter n44
(Output frequency)
Common for AM use
Note
0 to 10 V DC
(input impedance: 20 k Ω )
Relay output
1 A max. at 30 V DC
1 A max. at 250 V AC
2 mA max. at 0 to 10 V DC
1.
Depending on the parameter settings, various functions can be selected for multi-function inputs and multi-function contacts outputs.
2.
Functions in parentheses are default settings.
Selecting Input Method
Switches SW7 and SW8, both of which are located above the control circuit terminals, are used for input method selection.Remove the front cover and optional cover to use these switches.
SW7 SW8
SW7 SW8 Selector
Control circuit terminal block
14
Wiring
Selecting Frequency
Reference Input Method
Chapter 2-2
By using SW7, NPN or PNP input can be selected as shown below.
24V
NPN
SW7
GND
3.3k
0.1
µ
360
SC
GND
PNP
(
24 V DC
+ 10%)
SC
GND
3.3k
0.1
µ
SW7
360
24V
GND
Selecting Frequency
Reference Input Method
By using SW8, frequency reference voltage or current input can be selected.
Parameter settings are required together with the selection of the frequency reference input method.
SW8 setting Frequency reference input method
Voltage input
Current input
V (OFF)
I (ON)
Frequency reference selection
(parameter n03)
Set value 2
Set value 3 or 4
15
Wiring
2-2-3 Standard Connections
Noise Filter
DC reactor
(optional)
Chapter 2-2
3-phase 200 V AC
Single-phase 200 V AC
(see note 1)
3-phase 400 V AC
Forward/Stop
Multi-function input 1 (S2)
Multi-function input 2 (S3)
Multi-function input 3 (S4)
Multi-function input 4 (S5)
Sequence input common
FREQ adjuster
Frequency reference power supply 20 mA at +12 V
Frequency reference input
Frequency reference common
(2k
Ω
, 1/4 W min.)
Multi-function contact output
NO
NC
Common
Analog monitor output
Analog monitor output common
Note 1.
Connect single-phase 200 V AC to terminals R/L1 and S/L2 of the CIMR-
J7AZB _ .
2.
The braking resistor cannot be connected because no braking transistor is incorporated.
Example of 3-wire Sequence Connections
Stop switch
(NC)
RUN switch
(NO)
RUN input (Operates with the stop switch and RUN switch closed.)
Direction switch
Stop input (Stops with the stop switch opened.)
Forward/Stop reference (Forward with the direction switch opened and reverse with the direction switch closed.)
Sequence input common
Note Set parameter n37 for 3-wire sequence input.
16
Wiring
Chapter 2-2
2-2-4 Wiring around the Main Circuit
Wire Size, Terminal Screw, Screw Tightening Torque, and Molded-case
Circuit Breaker Capacities
For the main circuit and ground, always use 600-V polyvinyl chloride (PVC) cables.
If any cable is long and may cause voltage drops, increase the wire size according to the cable length.
3-phase 200-V AC Model
Model
CIMR-J7AZ-
Terminal symbol
20P1 R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
Terminal screw
M3.5
Screw tightening torque
(N • m)
0.8 to 1.0
Wire size
(mm
0.75 to 2
2 )
Recommended wire size
(mm 2 )
2
Moldedcase circuit breaker capacity (A)
5
20P2 0.8 to 1.0
0.75 to 2 2 5
20P4
20P7
21P5
22P2
24P0
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M3.5
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M3.5
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M3.5
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M3.5
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M3.5
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M4
0.8 to 1.0
0.75 to 2 2
0.8 to 1.0
0.75 to 2 2
0.8 to 1.0
2 to 5.5
0.8 to 1.0
2 to 5.5
1.2 to 1.5
2 to 5.5
2
3.5
5.5
5
10
20
20
30
17
Wiring
Single-phase 200-V AC Model
Model
CIMR-J7AZ-
Terminal symbol
B0P1
Chapter 2-2
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
Terminal screw
M3.5
Terminal torque
(N • m)
0.8 to 1.0
Wire size
(mm 2 )
0.75 to 2
Recommended wire size
(mm 2 )
2 5
Circuit breaker capacity
(A)
B0P2
B0P4
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M3.5
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M3.5
0.8 to 1.0
0.75 to 2 2
0.8 to 1.0
0.75 to 2 2
5
10
B0P7
B1P5
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M3.5
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M3.5
0.8 to 1.0
0.8 to 1.0
2 to 5.5
2 to 5.5
3.5
2
5.5
2
20
20
3-phase 400-V AC Model
Model
CIMR-J7AZ-
40P2
Terminal symbol
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
Terminal screw
M3.5
Terminal torque
(N • m)
0.8 to 1.0
Wire size
(mm 2 )
2 to 5.5
Recommended wire size
(mm 2 )
2 5
Circuit breaker capacity
(A)
40P4 R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M3.5
0.8 to 1.0
2 to 5.5
2 5
40P7 0.8 to 1.0
2 to 5.5
2 5
41P5
42P2
44P0
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M3.5
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M3.5
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M4
R/L1, S/L2, T/L3, –, +1, +2,
U/T1, V/T2, W/T3
M4
0.8 to 1.0
2 to 5.5
1.2 to 5.5
2 to 5.5
1.2 to 1.5
2 to 5.5
2
2
2
3.5
10
10
20
18
Wiring
Chapter 2-2
Wiring on the Input Side of the Main Circuit
Installing a Molded-case
Circuit Breaker
Always connect the power input terminals (R/L1, S/L2, and T/L3) and power supply via a molded case circuit breaker (MCCB) suitable to the Inverter.
• Install one MCCB for every Inverter used.
• Choose an appropriate MCCB capacity according to the Circuit breaker capacity column in the table on the previous page.
• For the MCCB’s time characteristics, be sure to consider the Inverter’s overload protection (one minute at 150% of the rated output current).
• If the MCCB is to be used in common among multiple Inverters, or other devices, set up a sequence such that the power supply will be turned off by a fault output, as shown in the following diagram.
Inverter
3-phase/Single-phase
200 V AC
3-phase 400 V AC
Power supply
MCCB
R/L1
S/L2
T/L3
OFF ON
MB
MC
Fault output
(NC)
Installing a Ground
Fault Interrupter
Installing a
Magnetic Contactor
Inverter outputs use high-speed switching, so high-frequency leakage current is generated.
In general, a leakage current of approximately 100 mA will occur for each
Inverter (when the power cable is 1 m) and approximately 5 mA for each additional meter of power cable.
Therefore, at the power supply input area, use a special-purpose breaker for
Inverters, which detects only the leakage current in the frequency range that is hazardous to humans and excludes high-frequencyleakage current.
• For the special-purpose breaker for Inverters, choose a ground fault interrupter with a sensitivity amperage of at least 10 mA per Inverter.
• When using a general leakage breaker, choose a ground fault interrupter with a sensitivity amperage of 200 mA or more per Inverter and with an operating time of 0.1 s or more.
If the power supply of the main circuit is to be shut off because of the sequence, a magnetic contactor can be used instead of a molded-case circuit breaker.
When a magnetic contactor is installed on the primary side of the main circuit to stop a load forcibly, however, the regenerative braking does not work and the load coasts to a stop.
• A load can be started and stopped by opening and closing the magnetic contactor on the primary side. Frequently opening and closing the magnetic contactor, however, may cause the Inverter to break down. In order not to shorten the service life of the Inverter’s internal relays and electrolytic capacitors, it is recommended that the magnetic contactor is used in this way no more than once every 30 minutes.
• When the Inverter is operated with the Digital Operator, automatic operation cannot be performed after recovery from a power interruption.
19
Wiring
Connecting Input
Power Supply to the
Terminal Block
Installing an AC Reactor
Installing a
Surge Absorber
Installing a Noise Filter on the Power Supply Side
Chapter 2-2
Input power supply can be connected to any terminal on the terminal block because the phase sequence of input power supply is irrelevant to the phase sequence (R/L1, S/L2, and R/L3).
If the Inverter is connected to a large-capacity power transformer (660 kW or more) or the phase advance capacitor is switched, an excessive peak current may flow through the input power circuit, causing the converter unit to break down.
To prevent this, install an optional AC reactor on the input side of the Inverter.
This also improves the power factor on the power supply side.
Always use a surge absorber or diode for the inductive loads near the Inverter.
These inductive loadsinclude magnetic contactors, electromagnetic relays, solenoid valves, solenoid, and magnetic brakes.
The Inverter’s outputs uses high-speed switching, so noise may be transmitted from the Inverter to the power line and adversely effect other devices in the vicinity. It is recommended that a Noise Filter be installed at the
Power Supply to minimize noise transmission. Noise will also be reduced from the power line to the Inverter.
Wiring Example 1
Power supply
Input Noise Filters
EMC-conforming Input Noise Filter: 3G3JV-PFI _
MCCB CIMR-J7AZ
Noise
Filter
VARISPEED
MCCB
Programmable
Controller
Note Use a Noise Filter designed for the Inverter. A general-purpose Noise Filter will be less effective and may not reduce noise.
20
Wiring
Chapter 2-2
Wiring on the Output Side of the Main Circuit
Connecting the Terminal
Block to the Load
Connect output terminals U/T1, V/T2, and W/T3 to motor lead wires U, V, and
W.
Check that the motor rotates forward with the forward command. Switch over any two of the output terminals to each other and reconnect if the motor rotates in reverse with the forward command.
Never Connect a
Power Supply to Output
Terminals
Never Short or Ground
Output Terminals
Do not Use a Phase
Advancing Capacitor or
Noise Filter
Do not Use an
Electromagnetic Switch of
Magnetic Contactor
Installing a Thermal Relay
Installing a Noise Filter on the Output Side
Never connect a power supply to output terminals U/T1, V/T2, or W/T3.
If voltage is applied to the output terminals, the internal circuit of the Inverter will be damaged.
If the output terminals are touched with bare hands or the output wires come into contact with the Inverter casing, an electric shock or grounding will occur.
This is extremely hazardous.
Also, be careful not to short the output wires.
Never connect a phase advance capacitor or LC/RC Noise Filter to the output circuit.
Doing so will result in damage to the Inverter or cause other parts to burn.
Do not connect an electromagnetic switch of magnetic contactor to the output circuit.
If a load is connected to the Inverter during running, an inrush current will actuate the overcurrent protective circuit in the Inverter.
The Inverter has an electronic thermal protection function to protect the motor from overheating. If, however, more than one motor is operated with one inverter or a multi-polar motor is used, always install a thermal relay (THR) between the Inverter and the motor and set n33 to 2 (no thermal protection).
In this case, program the sequence so that the magnetic contactor on the input side of the main circuit is turned off by the contact of the thermal relay.
Connect a Noise Filter to the output side of the Inverter to reduce radio noise and induction noise.
Power supply
MCCB CIMR-J7AZ
VARISPEED
Noise
Filter
Induction noise Radio noise
Signal line
Controller AM radio
Induction Noise: Electromagnetic induction generates noise on the signal line, causing the controller to malfunction.
Radio Noise: Electromagnetic waves from the Inverter and cables cause the broadcasting radio receiver to make noise.
21
Wiring
Chapter 2-2
Countermeasures against
Induction Noise
As described previously, a Noise Filter can be used to prevent induction noise from being generated on the output side. Alternatively, cables can be routed through a grounded metal pipe to prevent induction noise. Keeping the metal pipe at least 30 cm away from the signal line considerably reduces induction noise.
Power supply
MCCB CIMR-J7AZ
Metal pipe
VARISPEED
30 cm min.
Signal line
Controller
Countermeasures against
Radio Interference
Radio noise is generated from the Inverter as well as the input and output lines. To reduce radio noise, install Noise Filters on both input and output sides, and also install the Inverter in a totally enclosed steel box.
The cable between the Inverter and the motor should be as short as possible.
Steel box
Power supply MCCB
CIMR-J7AZ
Metal pipe
Noise
Filter
VARISPEED
Noise
Filter
Cable Length between
Inverter and Motor
Note
As the cable length between the Inverter and the motor is increased, the floating capacity between the Inverter outputs and the ground is increased proportionally. The increase in floating capacity at the Inverter outputs causes the high-frequency leakage current to increase, and this may adversely affect peripheral devices and the current detector in the Inverter’s output section. To prevent this from occurring, use a cable of no more than 100 meters between the Inverter and the motor. If the cable must be longer than 100 meters, take measures to reduce the floating capacity by not wiring in metallic ducts, by using separate cables for each phase, etc.
Also, adjust the carrier frequency (set in n46) according to the cable length between the Inverter and the motor, as shown in the following table.
Cable length 50 m or less
Carrier frequency 10 kHz max.
100 m or less
5 kHz max.
More than 100 m
2.5 kHz
Single-phase motors cannot be used.
The Inverter is not suited for the variable speed control of single-phase motors.
The rotation direction of a single-phase motor is determined by the capacitor starting method or phase-splitting starting method to be applied when starting the motor.
In the capacitor starting method, however, the capacitor may be damaged by a sudden electric discharge of the capacitor caused by the output of the
Inverter. On the other hand, the starting coil may burn in the phase-splitting starting method because the centrifugal switch does not operate.
22
Wiring
Ground Wiring
Chapter 2-2
• Always use the ground terminal with the following ground resistance:
200-V Inverter: 100 W or less
400-V Inverter: separate ground,10 W or less
• Do not share the ground wire with other devices such as welding machines or power tools.
• Always use a ground wire that complies with technical standards on electrical equipment and minimize the length of the ground wire.
Leakage current flows through the Inverter. Therefore, if the distance between the ground electrode and the ground terminal is too long, the potential on the ground terminal of the Inverter will become unstable.
• When using more than one Inverter, be careful not to loop the ground wire.
23
Wiring
Harmonics
Chapter 2-2
■ Definiton
Harmonics consist of electric power produced from AC power and alternating at frequencies that are integral multiples of the frequency of the AC power.
The following frequencies are harmonics of a 60- or 50-Hz commercial power supply.
Second harmonic: 120 (100) Hz
Third harmonic: 180 (150) Hz
Second harmonic (120 Hz)
Basic frequency (60 Hz)
Third harmonic (180 Hz)
■ Problems Caused by Harmonics Generation
The waveform of the commercial power supply will be distorted if the commercial power supply contains excessive harmonics. Machines with such a commercial power supply will malfunction or generate excessive heat.
Basic frequency (60 Hz) Third harmonic (180 Hz)
Distorted current wave form
24
Wiring
Causes of Harmonics
Generation
Chapter 2-2
Usually, electric machines have built-in circuitry that converts commercial AC power supply into DC power.
Such AC power, however, contains harmonics due to the difference in current flow between DC and AC.
Obtaining DC from AC Using Rectifiers and Capacitors
DC voltage is obtained by converting AC voltage into a pulsating one-side voltage with rectifiers and smoothing the pulsating one-side voltage with capacitors. Such AC current, however, contains harmonics.
Inverter
The Inverter as well as normal electric machines has an input current containing harmonics because the Inverter converts AC into DC. The output current of the Inverter is comparatively high. Therefore, the ratio of harmonics in the output current of the Inverter is higher than that of any other electric machine.
Voltage
Time
Rectified
Voltage
Time
Smoothed
Voltage
Time
Current
A current flows into the capacitors. The current is different from the voltage in waveform.
Time
25
Wiring
Countermeasures with
Reactors against
Harmonics Generation
Wiring Method
Power supply
Chapter 2-2
DC/AC Reactors
The DC reactor and AC reactor suppress harmonics and currents that change suddenly and greatly.
The DC reactor suppresses harmonics better than the AC reactor. The DC reactor used with the AC reactor suppresses harmonics more effectively.
The input power factor of the Inverter is improved by suppressing the harmonics of the input current of the Inverter.
Connection
Connect the DC reactor to the internal DC power supply of the Inverter after shutting off the power supply to the Inverter and making sure that the charge indicator of the Inverter turns off.
Do not touch the internal circuitry of the Inverter in operation, otherwise an electric shock or burn injury may occur.
With DC Reactor
DC reactor
(optional)
MCCB
3-phase 200 V AC
Single-phase 200 V AC
3-phase 400 V AC
VARISPEED
CIMR-J7AZ
Power supply
With DC and AC Reactors
DC reactor
(optional)
MCCB
3-phase 200 V AC
Single-phase 200 V AC
3-phase 400 V AC
AC reactor
(optional)
VARISPEED
CIMR-J7AZ
Reactor Effects
Harmonics suppression method
No reactor
AC reactor
DC reactor
DC and AC reactors
Harmonics are effectively suppressed when the DC reactor is used with the
AC reactor as shown in the following table.
5th harmonic
65
38
30
28
7th harmonic
41
14.5
13
9.1
Harmonic generation rate (%)
11th harmonic
13th harmonic
17th harmonic
19th harmonic
8.5
7.4
7.7
3.4
4.3
3.2
3.1
1.9
8.4
7.2
5
4.1
4.7
3.2
3.2
2.4
23rd harmonic
2.6
1.7
3.0
1.6
25th harmonic
1.8
1.3
2.2
1.4
26
Wiring
Chapter 2-2
2-2-5 Wiring Control Circuit Terminals
A control signal line must be 50 m maximum and separated from power lines.
The frequency reference must be input into the Inverter through shielded, twisted-pair wires.
Wiring of Control I/O Terminals
Wire each control I/O terminal under the following conditions.
Wires and Tightening
Torque
Multi-function Contact Output (MA, MB, and MC)
Terminal screw size
M3
Tightening torque N • m
0.5 to 0.6
Wire Wire size Recommended wire size
Single wire 0.5 to 1.25
(20 to 16)
0.75 (18)
Standard wire
0.5 to 1.25
(20 to 16)
Cable
Cable with polyethylene sheath
Sequential Input (S1 through S5 and SC) and
Analog Monitor Output (AM or AC)
Terminal screw size
M2
Tightening torque N • m
Wire Wire size
0.22 to 0.25 Single wire 0.5 to 1.25
(20 to 16)
Recommended wire size
0.75 (18)
Cable
Cable with polyethylene sheath
Standard wire
0.5 to 0.75
(20 to 18)
Frequency Reference Input (FR, FS, and FC)
Terminal screw size
M2
Tightening torque N • m
Wire Wire size
0.22 to 0.25 Single wire 0.5 to 1.25
(20 to 16)
Recommended wire size
0.75 (18)
Standard wire
0.5 to 0.75
(20 to 18)
Cable
Special cable with polyethylene sheath and shield for measurement use
Solderless Terminal Size The use of solderless terminals for the control circuit terminals is recommended for the reliability and ease of connection.
Note Make sure that the wire size is 0.5 mm
2
when using the following solderless terminal.
1.0 dia.
Model: Phoenix Contact's A1 0.5-8 WH
2.6 dia.
(Size: mm)
27
Wiring
Wiring Method
Chapter 2-2
Note
1.
Loosen the terminal screws with a thin-slotted screwdriver.
2.
Insert the wires from underneath the terminal block.
3.
Tighten each terminal screw firmly to a torque specified in the previous tables.
1.
Always separate the control signal line from the main circuit cables and other power cables.
2.
Do not solder the wires to the control circuit terminals. The wires may not contact well with the control circuit terminals if the wires are soldered.
3.
The end of each wire connected to the control circuit terminals must be stripped for approximately 5.5 mm.
4.
Connect the shield wire to the ground terminal of the CIMR-J7AZ. Do not connect the shield wire to the device side being controlled.
5.
Be sure to insulate the shield wire with tape so that the shield wire will not come into contact with other signal wires or equipment.
Thin-slotted screwdriver
Terminal block
Strip the end for approximately
5.5 mm if no solderless terminal is used.
Wire
Solderless terminal or wire without soldering.
Note Applying excessive torque may damage the terminal block. If the tightening torque is insufficient, homever, wires may disconnect.
28
Wiring
Chapter 2-2
2-2-6 Conforming to EC Directive
The following description provides the wiring method of the Inverter to meet
DC Directive requirements. If the following requirements are not satisfied, the whole equipment incorporating the Inverter will need further confirmation.
Standard Connection
Main Circuit Terminals
Noise Filter
MCCBs Clamp core
3-phase 200 V AC
Single-phase 200 V AC
3-phase 400 V AC
Control Circuit Terminals
Forward/Stop
Multi-function input 1 (S2)
Multi-function input 2 (S3)
Multi-function input 3 (S4)
Multi-function input 4 (S5)
Sequence input common
Frequency reference power supply at +12 V
FREQ adjuster
Frequency reference input
Frequency reference common
(2k Ω , 1/4 W min.)
Multi-function contact output
NO
NC
Common
Analog-monitor output
Analog-monitor output common
Note I/O signals can be connected to a single shielded cable.
29
Wiring
Chapter 2-2
Wiring the Power Supply Make sure that the Inverter and Noise Filter are grounded together.
• Always connect the power input terminals (R/L1, S/L2, and T/L3) and power supply via a dedicated Noise Filter.
• Reduce the length of the ground wire as much as possible.
• Locate the Noise Filter as close as possible to the Inverter. Make sure that the cable length between the Noise Filter and the Inverter does not exceed 40 cm.
• The following Noise Filters are available.
3-phase 200-V AC Noise Filter
Inverter
Model CIMR-J7AZ-
20P1/20P2/20P4/20P7
21P5/22P2
24P0
Schaffner model
3G3JV-PFI2010-SE
3G3JV-PFI2020-SE
3-phase 200-V AC Noise Filter
Rasmi model
3G3JV-PFI2010-E
3G3JV-PFI2020-E
--- 3G3JV-PFI2030-E
10
16
26
Rated current (A)
Single-phase 200-V AC Noise Filter
Inverter
Model 3G3JVSchaffner model
B0P1/B0P2/B0P4 3G3JV-PFI1010-SE
B0P7/B1P5 3G3JV-PFI1020-SE
3-phase 400-V AC Noise Filter
Inverter
Model CIMR-J7AZSchaffner model
Single-phase 200-V Noise Filter
Rasmi model
3G3JV-PFI1010-E
3G3JV-PFI1020-E
10
20
Rated current (A)
40P2/40P4
40P7/41P5/44P0
A44P0
3G3JV-PFI3005-SE
3G3JV-PFI3010-SE
3G3JV-PFI3020-SE
Single-phase 200-V Noise Filter
Rasmi model Rated current (A)
Schaffner model Rasmi model
3G3JV-PFI3005-E
3G3JV-PFI3010-E
3G3JV-PFI3020-E
5
10
20 15
Connecting a Motor to the
Inverter
Wiring a Control Cable
• When connecting a motor to the Inverter, be sure to use a cable with a braided shield.
• Reduce the length of the cable as short as possible and ground the shield on the Inverter side as well as the motor side. Make sure that the cable length between the Inverter and the motor does not exceed 20 cm.
Furthermore, connect a clamp core (Clamp Filter) close to the output terminals of the Inverter.
Product
Clamp Filter
Model
2CAT3035-1330 TDK
Manufacturer
• Be sure to connect a cable with a braided shield to the control circuit terminals.
• Ground the shield on the Inverter side only.
30
Wiring
Grounding the Shield
Chapter 2-2
In order to ground the shield securely, it is recommended that a cable clamp be directly connected to the ground plate as shown below.
Cable clamp
Ground plate
Cable
LVD Conformance
Shield
• Always connect the Inverter and power supply via a molded case circuit breaker (MCCB) suitable to the Inverter for protecting the Inverter from damage that may result from short-circuiting.
• Use one MCCB per Inverter.
• Select a suitable MCCB from the following table.
• With 400-V Inverters, it is necessary to ground to the power supply’s neutral phase.
300V Models
21P5
22P2
24P0
B0P1
B0P2
B0P4
B0P7
B1P5
Inverter
Model CIMR-J7AZ-
20P1
20P2
20P4
20P7
NF30
NF30
MCCB (Mitsubishi Electric)
Type Rated current (A)
5
5
5
10
5
10
20
20
20
20
30
5
31
Wiring
Chapter 2-2
400-V Models
Inverter
Model CIMR-J7AZ-
40P2
40P4
40P7
41P5
42P2
44P0
NF30
MCCB (Mitsubishi Electric)
Type Rated current (A)
5
5
5
10
10
20
To satisfy LVD (Low-voltage Directive) requirements, the system must be protected by a molded case circuit breaker (MCCB) when a short-circuit occurs. A single MCCB may be shared with more than one Inverter or with other machines. In that case, however, take some appropriate measures so that the MCCB will protect all the Inverters from the occurrence of any single short-circuit.
The frequency reference power supply (FS) of the Inverter is of basic insulation construction. When connecting the Inverter to peripheral devices, be sure to increase the degree of insulation.
32
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