Mitsubishi LE-30CTN, Инструкция по эксплуатации

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13.4 Measures for EMC
13. EC Directives (CE Marking)
(7) If the control box has holes, remove the coating from areas around holes, and completely close
holes so that metal is connected between the control box main body and the door.
If an exhaust fan is required, select the electromagnetic shield type. (However, note that an exhaust
fan deteriorates the noise radiation restraining effect and noise shielding effect.)
(8) Install bus bars inside the control box, and concentrate the grounding of various equipments on bus
bars. At this time, connect the grounding terminal of each equipment to a bus bar using a thick and
short wire, dedicated grounding strap or shielding mesh.
* It is important also to enhance the grounding inside the control box.
(9) For the control box main body, perform one-point grounding from a bus bar inside the control box to
the ground using a wire as thick and short as possible, dedicated grounding strap or shielding mesh.
The grounding resistance should be 100
Ω
or less, and 10
Ω
or less if possible.
* It is most important for achieving the electromagnetic compatibility to enhance the
grounding of the control box main body.
(10)Use a bus bar inside the control box only for the LE-30CTN. Install other bus bars inside the control
box for noise-generating equipments such as inverter and servo amplifier.
The grounding cable from the bus bar for the LE-30CTN to the outside of the control box should not
be shared by other bus bars for inverter and servo amplifier. Use an independent wire, grounding
strap or shielding mesh.
If problems may be caused by common use of one bus bar between the LE-30CTN and the PLC,
perform grounding separately to the bus bar for the LE-30CTN and the bus bar for the PLC.
(11)Weld connection areas between the ceiling and a side box of the control box without leaving any
gap. Or eliminate the gap using shielding gasket, and then tighten connection areas with screws.
13.4.3 Cable treatment
(1) For secure countermeasures against noise in the input power cable, separate the input power area
from other areas inside the control box so that the input power cable is not affected by radiated
noise.
(2) Cables offered as accessories of the tension detector (sensor) do not have sufficient shielding effect.
Provide overall shielding using a dedicated shielding cable or conduit (pipe) without disconnection.
Perform grounding to the overall shielding on the both sides (control box and tension detector). Make
sure to perform grounding also to the tension detector itself by utilizing a screw hole (M4) for
grounding. At this time, remove the coating from the screw hole, and then tighten the grounding
cable with a screw.
(3) When connecting the LE-30CTN to an actuator such as powder clutch/brake, hysteresis clutch/
brake, AC servo amplifier and vector inverter, perform electromagnetic shielding using a shielded
cable or conduit (pipe).
Perform grounding to the electromagnetic shield on the both sides (control box and actuator).
Make sure to perform grounding also to the actuator itself.
Utilize the mounting plate for an actuator without dedicated screw hole for grounding such as powder
clutch/brake. Use a dedicated screw hole for grounding in an actuator such as servo motor.
If the screw hole for grounding has coating, remove the coating before tightening the grounding
cable with a screw.
(4) Connect the grounding cable to the control box using a dedicated connector and grounding ring.
Perform grounding to the cable shield at 100
Ω
or less from the grounding ring by way of the bus bar
inside the control box.