Rockwell-automation System Design for the Control of Electrical Noise Manual do Utilizador descarregar pdf (Página 109)

Publication GMC-RM001A-EN-P — July 2001

Noise Control Supplement A-7

Figure A.5

Wire segregation test results

Figure A.6

Wire segregation test panel

Conclusions

The following statements summarize the results of the testing.

• 150 mm (6 in.) is a reasonable minimum separation required even

for short runs.

• A well grounded steel dividing wall is as good or better than 200

mm (8 in.) of separation.

Very noisy or very sensitive wires are best placed close to the

backplate if possible (this is good EMC practice).

Wire Segregation Test

500 mm run, unsuppressed relay coil

0.01

0.1

100

0 25 50 100 200

Horizontal Separation mm

Victim Noise Vp

40 mm

3 mm

1 2 ... 104 105 106 107 108 109 110 111 112 113 114 ... 126 127

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Rockwell-automation System Design for the Control of Electrical Noise Manual do Utilizador Página 109