5 0
P a n e l M a t e e P r o P S U s e r s G u i d e
Ethernet Communications
Recommended Distance
Recommended Cable Type/Size
Install in compliance with IEEE 802
Standards
CAT 5, STP (Sheilded Twisted Pair)
Ethernet Shielding Recommendations
Application: Short or Long Runs in LOW or HIGH Noise Environment with
INSIGNIFICANT Levels of Low Frequency Ground Differential Voltage Between
Connected Units
A good quality CAT 5 STP cable is recommended. A CAT 5 UTP cable is not
recommended because the unshielded cable and connectors may act as an antenna
resulting in radiated emissions that may exceed CE specification limit. Additionally, STP
cable provides greater ESD protection. The shield should be connected directly to the
chassis of the interconnected units at
both ends
. The connector housing should contact
the cable shield uniformly around the entire 360-degree periphery of the housing cable
entry opening. Never connect the shield by way of a drain wire pigtail unless absolutely
necessary. If a pigtail is required, the shield should be terminated as closely as possible
to the connector to minimize the pigtail length.
Application: Short or Long Runs in LOW Noise Environment with HIGH Levels of
Low Frequency Ground Differential Voltage Between Connected Units
A good quality CAT 5 STP cable is recommended. The shield should be connected
directly to the chassis of one of the interconnected units (one end only). Never connect
the shield by way of a drain wire pigtail unless absolutely necessary. If a pigtail is
required, the shield should be terminated as closely as possible to the connector to
minimize the pigtail length.
Application: Short or Long Runs in HIGH Noise Environment with HIGH Levels of
Low Frequency Ground Differential Voltage Between Connected Units
A good quality CAT 5 STP cable is recommended. The shield should be connected
directly to the chassis of one of the interconnected units and ac-coupled through a 0.01
microfarad capacitor at the other end to the chassis of the second unit. The connector
housing should contact the cable shield uniformly around the entire 360-degree
periphery of the housing cable entry opening. Attaching the capacitor at the ac-coupled
end will require some ingenuity to achieve a secure connection at both the shield and
chassis while keeping the capacitor lead length as short as possible.