Appendix 7. EMC Installation Guidelines
Appendix 7-1 Introduction ......................................................................................................................A7-2
Appendix 7-2 EMC instructions ..............................................................................................................A7-2
Appendix 7-3 EMC measures ................................................................................................................A7-3
Appendix 7-4 Measures for panel structure ...........................................................................................A7-3
Appendix 7-4-1 Measures for control panel unit.................................................................................A7-3
Appendix 7-4-2 Measures for door .....................................................................................................A7-4
Appendix 7-4-3 Measures for operation board panel .........................................................................A7-4
Appendix 7-4-4 Shielding of the power supply input section..............................................................A7-4
Appendix 7-5 Measures for various cables ............................................................................................A7-5
Appendix 7-5-1 Measures for wiring in panel .....................................................................................A7-5
Appendix 7-5-2 Measures for shield treatment...................................................................................A7-5
Appendix 7-5-3 Servomotor power cable ...........................................................................................A7-6
Appendix 7-5-4 Servomotor feedback cable ......................................................................................A7-6
Appendix 7-5-5 Spindle motor power cable........................................................................................A7-7
Appendix 7-5-6 Spindle motor feedback cable...................................................................................A7-7
Appendix 7-6 EMC countermeasure parts .............................................................................................A7-8
Appendix 7-6-1 Shield clamp fitting ....................................................................................................A7-8
Appendix 7-6-2 Ferrite core ................................................................................................................A7-9
Appendix 7-6-3 Power line filter........................................................................................................A7-10
Appendix 7-6-4 Surge protector........................................................................................................A7-15
A7 - 1
Appendix 7. EMC Installation Guidelines
Appendix 7-1 Introduction
EMC Instructions became mandatory as of January 1, 1996. The subject products must have a CE mark attached indicating that the product complies with the Instructions.
As the NC unit is a component designed to control machine tools, it is believed to be out of the direct
EMC Instruction subject. However, we would like to introduce the following measure plans to backup
EMC Instruction compliance of the machine tool as the NC unit is a major component of the machine tools.
(1) Methods for installation in control/operation panel
(2) Methods of wiring cable outside of panel
(3) Introduction of countermeasure parts
Mitsubishi is carrying out tests to confirm the compliance to the EMC Standards under the environment described in this manual. However, the level of the noise will differ according to the equipment type and layout, control panel structure and wiring lead-in, etc. Thus, we ask that the final noise level be confirmed by the machine manufacturer.
These contents are the same as the EMC INSTALLATION GUIDELINES (BNP-B8582-45).
For measures for CNC, refer to "EMC INSTALLATION GUIDELINES" (BNP-B2230).
Appendix 7-2 EMC instructions
The EMC Instructions regulate mainly the following two withstand levels.
Emission ..... Capacity to prevent output of obstructive noise that adversely affects external sources.
Immunity ..... Capacity not to malfunction due to obstructive noise from external sources.
The details of each level are classified as Table 1. It is assumed that the Standards and test details required for a machine are about the same as these.
Table 1
Class Name
Radiated noise
Emission
Conductive noise
Details
Electromagnetic noise radiated through the air
Electromagnetic noise discharged from power line
Generic
Standard
Standards for determining test and measurement
EN50081-2
EN61800-3
(Industrial environment)
EN55011
IEC61000-4-2
Immunity
Static electricity electrical discharge
Radiated magnetic field
Burst immunity
Conductive immunity
Power supply frequency field
Power dip
(fluctuation)
Example) Withstand level of discharge of electricity charged in a human body.
Example) Simulation of immunity from digital wireless transmitters
Example) Withstand level of noise from relays or connecting/disconnecting live wires
Example) Withstand level of noise entering through power line, etc.
Example) 50/60Hz power frequency noise
Example) Power voltage drop withstand level
Surge
Example) Withstand level of noise caused by lightning
IEC61000-4-3
EN61000-6-2
EN61800-3
(Industrial environment)
IEC61000-4-4
IEC61000-4-6
IEC61000-4-8
IEC61000-4-11
IEC61000-4-5
A7 - 2
Appendix 7. EMC Installation Guidelines
Appendix 7-3 EMC measures
The main items relating to EMC measures include the following.
(1) Store the device in an electrically sealed metal panel.
(2) Earth all conductors that are floating electrically. (Lower the impedance.)
(3) Wire the power line away from the signal wire.
(4) Use shielded wires for the cables wired outside of the panel.
(5) Install a noise filter.
Ensure the following items to suppress noise radiated outside of the panel.
(1) Securely install the devices.
(2) Use shielded wires.
(3) Increase the panel's electrical seal. Reduce the gap and hole size.
Note that the electromagnetic noise radiated in the air is greatly affected by the clearance of the panel and the quality of the cable shield.
Appendix 7-4 Measures for panel structure
The design of the panel is a very important factor for the EMC measures, so take the following measures into consideration.
Operation board panel
Door
Control panel
Appendix 7-4-1 Measures for control panel unit
(1) Use metal for all materials configuring the panel.
(2) For the joining of the top plate and side plates, etc., mask the contact surface with paint, and fix with welding or screws.
In either case, keep the joining clearance to a max. of 20cm for a better effect.
(3) Note that if the plate warps due to the screw fixing, etc., creating a clearance, noise could leak from that place.
(4) Plate the metal plate surface (with nickel, tin) at the earthing section, such as the earthing plate.
(5) The max. tolerable hole diameter of the openings on the panel surface, such as the ventilation holes, must be 3cm to 5cm. If the opening exceeds this size, use a measure to cover it. Note that even when the clearance is less than 3cm to 5cm, noise may still leak if the clearance is long.
Example)
Painting mask
Hole exceeding
3cm to 5cm
∗
Provide electrical conductance
A7 - 3
Painting mask
Max. joining clearance 20cm
Appendix 7. EMC Installation Guidelines
Appendix 7-4-2 Measures for door
(1) Use metal for all materials configuring the door.
(2) Use an EMI gasket or conductive packing for the contact between the door and control panel unit.
(3) The EMI gasket or conductive packing must contact at a uniform and correct position of the metal surface of the control panel unit.
(4) The surface of the control panel unit contacted with the EMI gasket or conductive packing must have conductance treatment.
EMI gasket
Packing
Control panel
Door
Carry out conductance treatment on sections that the EMI gasket contacts.
(5) As a method other than the above, the control panel unit and door can be connected with a plain braided wire. In this case, the panel and door should be contacted at as many points as possible.
Appendix 7-4-3 Measures for operation board panel
(1) Always connect the operation board and indicator with an earthing wire.
(2) If the operation board panel has a door, use an EMI gasket or conductive packing between the door and panel to provide electrical conductance in the same manner as the control panel.
(3) Connect the operation board panel and control panel with a sufficiently thick and short earthing wire.
Refer to the "EMC INSTALLATION GUIDELINES" BNP-B2230 for the NC for more details.
Appendix 7-4-4 Shielding of the power supply input section
(1) Separate the input power supply section from other parts in the control panel so that the input power supply cable will not be contaminated by radiated noise.
(2) Do not lead the power line through the panel without passing it through a filter.
Control panel
Drive unit
Power line filter
Radiated noise
Breaker AC input
Control panel
Drive unit
Shielding plate
Power line filter
Radiated noise
Breaker AC input
The power supply line noise is eliminated Use a metal plate, etc., for the shielding by the filter, but cable contains noise again because of the noise radiated in the control panel.
partition. Make sure not to create a clearance.
A7 - 4
Appendix 7. EMC Installation Guidelines
Appendix 7-5 Measures for various cables
The various cables act as antennas for the noise and discharge the noise externally. Thus appropriate treatment is required to avoid the noise.
The wiring between the drive unit and motor act as an extremely powerful noise source, so apply the following measures.
Appendix 7-5-1 Measures for wiring in panel
(1) If the cables are led unnecessarily in the panel, they will easily pick up the radiated noise. Thus, keep the wiring length as short as possible.
Noise Noise
Device Device Device Device Device Device
(2) The noise from other devices will enter the cable and be discharged externally, so avoid internal wiring near the openings.
Control panel Control panel
Device Device Device Device
Noise
(3) Connect the control device earthing terminal and earthing plate with a thick wire. Take care to the leading of the wire.
Appendix 7-5-2 Measures for shield treatment
Common items
Use of shield clamp fittings is recommended for treating the shields. The fittings are available as options, so order as required. (Refer to section "6.1 Shield clamp fitting".)
Clamp the shield at a position within 10cm from the panel lead out port.
POINT
1. When leading the cables, including the grounding wire (FG), outside of the panel, clamp the cables near the panel outlet (recommendation: within
10cm).
2. When using a metal duct or conduit, the cables do not need to be clamped near the panel outlet.
3. When leading cables not having shields outside the panel, follow the instructions given for each cable. (Installation of a ferrite core, etc., may be required.)
A7 - 5
Appendix 7. EMC Installation Guidelines
Appendix 7-5-3 Servomotor power cable
Control panel
Control panel
Earth with paint mask
Conduit connector
Earth with P or U clip
Cannon connector To drive unit
Cannon connector
To drive unit
Servomotor
Servomotor
Conduit
Shield cable Cabtyre cable
Using shield cable Using conduit
(1) Use four wires (3-phase + earthing) for the power cable that are completely shielded and free from breaks.
(2) Earth the shield on both the control panel side and motor chassis side.
(3) Earth the shield with a metal P clip or U clip.
(A cable clamp fitting can be used depending on the wire size.)
(4) Directly earth the shield. Do not solder the braided shield onto a wire and earth the end of the wire.
Solder
(5) When not using a shield cable for the power cable, use a conventional cabtyre cable. Use a metal conduit outside the cable.
(6) Earth the power cable on the control panel side at the contact surface of the conduit connector and control panel. (Mask the side wall of the control panel with paint.)
(7) Follow the treatment shown in the example for the conduit connector to earth the power cable on the motor side. (Example: Use a clamp fitting, etc.)
Clamp fitting
To earthing
Conduit
Conduit connector
Appendix 7-5-4 Servomotor feedback cable
Control panel
Cannon connector
Use a conventional batch shield pair cable for the servomotor feedback cable, and ground it in the NC side
(control panel).
Cannon connector
To drive unit
Batch shield pair cable
A7 - 6
Appendix 7. EMC Installation Guidelines
Appendix 7-5-5 Spindle motor power cable
Control panel
Control panel
Earth with
P or U clip
Terminal box
Earth with paint mask
Conduit connector Terminal box
To drive unit
To drive unit
Conduit
Shield cable
Spindle motor
Using shield cable
Cabtyre cable
Using conduit
(1) Use four wires (3-phase + earthing) for the power cable that are completely shielded and free from breaks.
(2) Earth the shield in the same manner as the servomotor power cable.
(3) When not using a shield cable for the power cable, use a conventional cabtyre cable. Use a metal conduit outside the cable.
(4) Earth the power cable on the control panel side at the contact surface of the conduit connector and control panel side wall in the same manner as the servomotor power cable. (Mask the side wall of the control panel with paint.)
(5) Earth at the conduit connector section in the same manner as the servomotor power cable.
Appendix 7-5-6 Spindle motor feedback cable
Control panel
Clamp the shield, and connect to the connector case.
Terminal box
To drive unit
Spindle side connector
(State with the cover removed)
Batch shield pair cable
(1) Use a conventional batch shield pair cable for the spindle motor feedback cable.
Note) A shield for the spindle motor feedback cable is not "FG", and therefore do not ground it.
A7 - 7
Appendix 7. EMC Installation Guidelines
Appendix 7-6 EMC countermeasure parts
Appendix 7-6-1 Shield clamp fitting
The effect can be enhanced by connecting the cable directly to the earthing plate. Install an earthing plate near each panel's outlet (within 10cm), and press the cable against the earthing plate with the clamp fitting. If the cables are thin, several can be bundled and clamped together. Securely earth the earthing plate with the frame ground. Install directly on the cabinet or connect with an earthing wire.
Contact Mitsubishi if the earthing plate and clamp fitting set (AERSBAN- SET) is required.
•
Outline drawing
View of clamp section
AERSBAN-DSET
AERSBAN-ESET
100
70
86
56
30
–
Note 1) Screw hole for wiring to earthing plate in cabinet.
Note 2) The earthing plate thickness is 1.6mm.
Clamp fitting A
×
2
Clamp fitting B
×
1
Clamp fitting A
Clamp fitting B
L
70
45
CAUTION
The shield of the spindle detector cable is not connected to the "FG"(Earth). Do not connect the cable shield to the earth by clamping the cable, etc.
A7 - 8
Appendix 7. EMC Installation Guidelines
Appendix 7-6-2 Ferrite core
A ferrite core is integrated and mounted on the plastic case.
Quick installation is possible without cutting the interface cable or power cable.
This ferrite core is effective against common mode noise, allowing measures against noise to be taken without affecting the signal quality.
Recommended ferrite core
TDK ZCAT Series
Shape and dimensions
ZCAT type
A
B
D
C
ZCAT-A type
A
B
E
C
ZCAT-B type
A
B
Fig. 1
E
ZCAT-C type
A
Fig. 2
Fig. 3 Fig. 4
ZCAT3035-1330 (-BK)*
1
ZCAT2035-0930-M (-BK)
ZCAT2017-0930-M (-BK)
ZCAT2749-0430-M (-BK)
Unit [mm]
Applicable
Weight
Recommended ferrite core
1 39 34 13 30 --- 13 63
2 35 29 13 23.5
4 49 27 4.5
19.5
22 10 29
9 12
--- 4.5 26
*1 A fixing band is enclosed when shipped.
ZCAT-B type: Cabinet fixed type, installation hole ø4.8 to 4.9mm, plate thickness 0.5 to 2mm
ZCAT-C type: Structured so that it cannot be opened easily by hand once closed.
A7 - 9
Appendix 7. EMC Installation Guidelines
Appendix 7-6-3 Power line filter
(1) Power line filter for 200V
HF3000A-TM Series for 200V
Features
•
3-phase 3-wire type (250V series, 500V series)
•
Compliant with noise standards German Official Notice Vfg243,
EU Standards EN55011 (Class B)
•
Effective for use with IGBT inverter and MOS-FET inverter.
•
Easy mounting with terminal block structure, and outstanding reliability.
Application
•
Products which must clear noise standards German Official
Notice Vfg243 and EU Standards EN55011 (Class B).
•
For input of power converter using advanced high-speed power device such as IGBT MOS-FET.
Specifications (250V series)
Part name
HF3005A HF3010A HF3015A HF3020A HF3030A HF3040A HF3050A HF3060A HF3080A HF3100A HF3150A
-TM -TM -TM -TM -TM -TM -TM -TM -TM -TM -TM
Rated voltage 250VAC
Rated current 5A 10A 15A 20A 30A 40A 50A 60A 80A 100A
Leakage current 1.5mA MAX 250VAC 60Hz
Contact: Soshin Electric Co., LTD. Telephone: 03-3775-9112 (+81-3-3775-9112) http://www.soshin.co.jp
<Example of measuring voltage at noise terminal> ... Measured with IGBT inverter
150A
German Official Notice Vfg243 measurement data EU Standards EN55011 (Class B)
A7 - 10
<Typical characteristics>
Appendix 7. EMC Installation Guidelines
40A item
<Circuit diagram>
(250V series)
Outline dimensions
(500V series)
[ Unit : mm ]
Part name
Dimensions
A B C
HF3005A-TM
HF3010A-TM
HF3015A-TM
180 170 130
HF3020A-TM
HF3030A-TM
260 155 140
HF3040A-TM
HF3050A-TM
HF3060A-TM
290 190
170
230
HF3080A-TM
405 220
HF3100A-TM
HF3150A-TM 570 230
210
A7 - 11
Appendix 7. EMC Installation Guidelines
200V MX13 Series 3-phase high attenuation noise filter
Features
•
Perfect for mounting inside control panel:
New shape with uniform height and depth dimensions
•
Easy mounting and maintenance work:
Terminals are centrally located on the front
•
Complaint with NC servo and AC servo noise:
High attenuation of 40dB at 150KHz
•
Safety Standards:
UL1283, CSA22.2 No.8, EN133200
•
Patent and design registration pending
Specifications
Type
MX13030 MX13050 MX13100 MX13150
Item
1 Rated voltage (AC)
2 Rated current (AC)
3
Test voltage (AC for one minute across terminal and case)
4
Insulation resistance
(500VDC across terminal and case)
5 Leakage current (250V, 60Hz)
3-phase 250VAC (50/60Hz)
2500VAC (100mA) at 25°C, 70% RH
100M
Ω
min. at 25°C, 70% RH
8 Working ambient temperature
9 Working ambient humidity
10 Storage ambient temperature
11 Storage ambient humidity
12 Weight (typ)
3.5 mA max.
30 m
Ω
max. 11 m
Ω
max.
30°C max
8 mA max.
5.5 m
Ω
max. 3.5 m
Ω
max.
–25°C to +85°C
30% to 95% RH (non condensing)
–40°C to +85°C
10% to 95% RH (non condensing)
2.8kg 3.9kg 11.5kg 16kg
(Note) This is the value at Ta
≤
50°C.
Refer to the following output derating for Ta>50°C.
Contact : Densei-lambda Co., Ltd. Telephone : 03-3447-4411 (+81-3-3447-4411)
Fax : 03-3447-7784 (+81-3-3447-7784)
http://www.densei-lambda.com
A7 - 12
Appendix 7. EMC Installation Guidelines
Example of using MX13 Series
This is a noise filter with the same dimensions as MDS-D/DH drive unit depth (200mm) and height
(380mm). This unit can be laid out easily in the device by arranging it in a row with the servo unit.
As with the servo unit, the terminals are arranged on the front enabling ideal wire lead-out.
Refer to the following usage examples for details.
Wire to 3-phase power supply
Noise filter input terminal
200
380
Noise filter (MX13 Series)
Servo unit
Servo input terminal
Example of noise terminal voltage attenuation
Wire from noise filter to servo
Noise filter output terminal
Frequency [MHz] Frequency [MHz]
EMI data for independent control panel EMI data for control panel + noise filter
(with six-axis servo unit mounted) (MX13030)
Output derating
Ambient temperature Ta (°C)
A7 - 13
Outline drawing
MX13030, MX13050
Appendix 7. EMC Installation Guidelines
[ Unit : mm ]
MX13030 MX13050
A
B
C
D
E
F
66 81
45 55
10.5 13
50 67
13 16
10 13
G 177 179
H M4 screw M6 screw
I 70 85
J M4 screw M6 screw
K 195 200
MX13100, MX13150
(Installation hole) (Installation hole)
[ Unit : mm ]
A
B
C
D
E
130 165
90 110
20 27.5
115 150.5
37.5 57.5
J
K
L
F
G
18 23
174 176
H M6 screw M8 screw
I 21 27
37.5 56.5
115 149.5
276 284
A7 - 14
Appendix 7. EMC Installation Guidelines
Appendix 7-6-4 Surge protector
Insert a surge protector in the power input section to prevent damage to the control panel or power supply unit, etc. caused by the surge (lightning or sparks, etc.) applied on the AC power line.
Use a surge protector that satisfies the following electrical specifications.
(1) Surge protector for 200V
R•A•V BYZ series for 200V
Part name
Circuit voltage
50/60Hz Vrms
Maximum tolerable circuit voltage
Clamp voltage
(V) ±10%
Surge withstand level
8/20µs (A)
Surge withstand voltage
1.2/50µs (V)
Electrostatic capacity
Service temperature
RAV-781BYZ-2 3AC 250V 300V 783V 2500A 20kV 75pF -20 to 70°C
(Note) Refer to the manufacturer's catalog for details on the surge protector's characteristics and specifications, etc.
(1) Black (2) Black (3) Black
0 0
UL-1015 AWG16
41 1
R•A•V BXZ series for 200V unit: mm
Part name
Circuit voltage
50/60Hz Vrms
Maximum tolerable circuit voltage
Clamp voltage
(V) ±10%
Surge withstand level
8/20µs (A)
Surge withstand voltage
1.2/50µs (V)
Electrostatic capacity
Service temperature
RAV-781BXZ-4 3AC 250V 300V 1700V 2500A 2kV 75pF -20 to 70°C
(Note) Refer to the manufacturer's catalog for details on the surge protector's characteristics and specifications, etc. diagram
(1)Black (2)Black (3)Black
U Green
0 0
UL-1015 AWG16
41 1
A7 - 15 unit: mm
Appendix 7. EMC Installation Guidelines
(2) Example of surge protector installation
Factory power
Input power supply
Grounding
An example of installing the surge protector in the machine control panel is shown below.
A short-circuit fault will occur in the surge protector if a surge exceeding the tolerance is applied.
Thus, install a circuit protection breaker in the stage before the surge protector. Note that almost no current flows to the surge protector during normal use, so a breaker installed as the circuit protection for another device can be used for the surge protector.
Panel earth leakage breaker Breaker
Breaker
B
Grounding plate
A
Transformer
Contactor
MC
Breaker
AC reactor
NC unit
Other device
(panel power supply, etc.)
Power supply unit and drive unit
Other device
(panel power supply, etc.)
(1) Surge protector
(Protection across phases)
Control panel
(relay panel,
etc.)
(2) Surge protector
(Protection across each phase's grounding)
Installing the surge absorber
CAUTION
1. The wires from the surge protector should be connected without extensions.
2. If the surge protector cannot be installed just with the enclosed wires, keep the wiring length of A and B to 2m or less. If the wires are long, the surge protector's performance may drop and inhibit protection of the devices in the panel.
3. The selected surge protector differs according to the input power voltage.
A7 - 16
