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9.3 Power Supply Wiring and Grounding
9
9.3 Power Supply Wiring and Grounding
(1) Power supply wiring
(a) S controller power supply wiring
Wire the S controller power according to the items presented in "Wiring of the
Power Supply" section in the S3 User's Manual - Hardware.
Use shielded transformers and noise filters if the power supply has a high noise
level.
(b) Power supply wiring for the MAU power supply terminals
See section 3.5, "MAU Power Supply" in this document.
(2) Grounding
(a) S controller Grounding
Wire the S controller power according to the items presented in "Grounding"
section in the S3 User's Manual - Hardware.
(b) Grounding for the MAU power supply terminals
See section 3.5, "MAU Power Supply". This ground is critical for noise prevention
for the 10BASE5 AUI cables.
Warning
• Turn off all power before wiring or connecting any cables.
Wiring or connecting cables with the power on can lead to electrical shocks.
• Either use crimp-on connectors with sheaths or wrap exposed conductors with insulating
tape so that no conductors are exposed.
Also, handle the terminal block cover so that it is not lost or damaged. When the wiring oper-
ations are done, do not fail to reinstall the terminal block cover on the terminal block.
Leaving conductors exposed can lead to electrical shocks.
• Ground the equipment.
Electrical shocks and malfunctions are possible if equipment is not grounded correctly. In
particular, the MAU power supply terminal grounding is critical for AUI cable noise preven-
tion.
Caution
• Connect a power source that matches the ratings for the MAU power supply terminal block.
Be sure to connect the 12-VDC power + and - sides correctly. Use of incorrect wiring or a
power supply with an incorrect rating can cause explosions or fires.
• Only the qualified personnel should perform all wiring operations.
Incorrect wiring can cause fires, breakdowns, and electrical shocks.
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