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Network Layout Guidelines
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BNC jack-to-jack connectors are to be used in all coaxial cable splices. |
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• The communication cable shield (where used) must be continuous throughout the link. However, communication cables may supply low level power (less than 1 watt at 24 volts maximum rms). |
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• Cable terminators (50 ohms) must be installed at each end of the coaxial cable link. |
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• If coaxial cable must be extended, the additional section should be from the same manufacturer's lot. |
Caution: The outer shield conductor of Ethernet coaxial cable MUST NOT touch earth ground points. If BNC conductors are inside conduit, wrap them completely with electrical tape to prevent shorting to earth ground.
Using Generic Ethernet Boards
If the NCR or WD boards are not used exclusively:
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The maximum overall network length is |
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The maximum number of nodes is 30. |
Note: Off-the-shelf generic Ethernet boards must meet the requirements in IEEE Specification #802.3.