Example Of Measure Against Noise - Mitsubishi Electric Melsec-Q172DCPU User Manual

7 EMC DIRECTIVES

7.1.4 Example of measure against noise

Q61P QnUD Q17 D(S)
CPU
CPU
Battery holder
unit
(Q170DBATC)
(Note-1)
1)
2)
Noise ferrite
(FR-BLF)
MCCB
AC power
supply
1) Ground the FG terminal of the Motion controller and 24VDC power supply module to the control panel.
2) Measure against noise of the power supply cable
• Wire the power supply cable as short as possible using the twisted cable.
• Set a line filter (FR-BLF) near the exit/entrance of control panel and in secondary side of MCCB. (Approx. 4 turn)
3) Measure against noise of the encoder cable
• When the cables are extracted from the control panel, ground the cables at a position 5 to 10cm (1.97 to 3.94inch) away from the exit/entrance
of the control panel with the cable clamp, etc.
• Refer to the Section 2.5.5 and Appendix 1.2 for encoder cable.
Use shielded twisted pair cable.
4) Measure against noise of the manual pulse generator/external signal input cable
• When the cables are extracted from the control panel, ground the cables at a position 5 to 10cm (1.97 to 3.94inch) away from the exit/entrance
of the control panel with the cable clamp, etc.
• Refer to the Section 2.5.6 for manual pulse generator.
Use shielded twisted pair cable.
• Refer to the Section 2.5.4 for external signal input.
Use shielded twisted pair cable between the external signal and COM signal.
• When the cables are connected to internal I/F connector of Q173DSCPU/Q172DSCPU and extracted from the control panel, ground the
cables at a position 20 to 30cm (1.97 to 3.94inch) away from the module with the cable clamp, etc. Use a shielded cable.
• Refer to the Section 2.5.1and Appendix 1.5 for internal I/F connector cable.
5) Measure against noise of the internal I/F cable
• When the cables are extracted from the control panel, ground the cables at a position 20 to 30cm (1.97 to 3.94inch) away from the module
with the cable clamp, etc. Use a shielded cable.
Control panel
QI60 QX / Q6 AD Q172D
QY /DA LX
5)
Ethernet cable
(Shield twisted pair of category 5 or more)
SSCNET
(1) Refer to Section 2 for the following cables.
• Ethernet cable
• USB cable
• SSCNET cable
• Battery cable
• Forced stop input cable
Q173D Q172D
PX EX
3)
Manual pulse generator/
DI cable
cable
7 - 8
: AD75CK cable clamp
: Ferrite core (ZCAT3035-1330)
: Ferrite core (ZCAT2032-0930)
(It is packed together with internal I/F
connector set)
Encoder cable (Q171ENC-W8/
Q170ENC)
4)
(Note-1): Q173DCPU(-S1)/Q172DCPU(-S1) only
Encoder
Manual pulse
generator
(MR-HDP01)
Limit switch